DOE-2.2 bug fixes through version -037b

LOADS program 

*/=== Fix some initialization bugs that caused GP faults when some types
*/===     of shading surfaces were in problem.
*/=== Also, make std. file pointer dump more readable.
*/=== [JJH 6/9/97]
*/=== allow consistant use of new default expressions
*/=== 1. use ZONE-FRACTION2 as the key to 2nd daylighting area rather
*/===    than looking for 2nd reference point fully specified. (BDL
*/===    now checks for 1st and 2nd point based upon DAYLIGHTING=YES
*/===    and ZONE-FRACTION2 >0., respectively)
*/=== 2. use PEOPLE-HEAT-GAIN if specified, to overwrite sens and lat
*/===    values for reporting as well as calc; before both were reported 
*/===    as input but P-H-G overwrote without changing report values.
*/=== [JJH 7/2/97]
*/=== Fix bug in S-G infiltration calculation.  The coeff's were getting
*/=== passed to HVAC as 0.0 due to their being moved (not equiv'ed) to
*/=== out of the same positions as the three residential coeff's
*/=== [JJH 1/27/98]
*/=== Fix problem in shading calculation for exterior wall polygons that have
*/=== adjacent verticies (1,2,3 or 2,3,4) that are collinear or don't exist.
*/=== This caused a divide by zero or strange results
*/=== [FCW/JJH 4/10/98]
*/=== now replace FFDIF code to use points 1,2,3 rather than 4,3,2
*/=== A few modifications to allow TILT for external surfaces to
*/=== have a range from -180 to 180 rather than 0 to 180.  These
*/=== changes only effect convection calc's as solar calc's must
*/=== use the relative positionally correct angles.
*/=== THERM and the various film resistance calculations use
*/=== the absolute value of TILT in the calculations; this has
*/=== the effect of reversing the top and bottom of the window for
*/=== the convection calc's which is required as those calc's use
*/=== correlations that assume the tilt is positive.
*/=== (The other way to do this would have been to remake the
*/=== walls at BDL output time, but this is VERY complex if there
*/=== are POLYGON wall shapes.  This method will produce same
*/=== results for same wall input with different coord's and
*/=== TILT = n vs -n)
*/=== [6/30/99 JJH]
*/=== Use absolute value of TILT to determine if horizontal
*/=== For the THERM calculation use absolute value of TILT
*/=== For FILM2 use absolute as well
*/=== Fix debug print in THEM to send to output file not console
*/=== Fix bug in LOADS report LV-D.  More than 500 spaces or walls
*/=== in a project caused a GP fault due to fixed dimensioned array
*/=== space being exceeded.  Changed to 512 spaces and 2048 walls.
*/=== [6/27/98 JJH]
*/=== Remove call to MessageBox incorrectly left in this mod
*/=== Fix bug in LOADS LD-D report.  Floor AZIMUTH and wall TILT were 
*/=== not taken into account when calculating AZ's for report.  If TILT
*/=== is <0 add 180 to AZ.  Add FLOOR AZ always, if a FLOOR is there.
*/=== [JJH 3/6/99]
*/=== Allow building net area of zero by calculating total cond +
*/=== uncond area and setting gross/net area to it if net is zero.
*/=== [5/20/99 JJH]
*/=== Fix bug that prevented SPACE level reports if more than 64 SPACEs
*/=== are defined in LOADS. Caused either a GP Fault, unreliable
*/=== results, or the report generator to issue ERRORs. (From JJH 2.1E mods)
*/=== [JJH 7/15/99]
*/=== Fix big that causes totally bogus results in SYSTEMS (possible -nan 
*/=== values for heat or cool loads) in a models with SUNPACE = YES.
*/=== The response factors that were being passed from LOADS to HVAC were
*/=== incorrect as the wall properties block has shifted due to the 4->8
*/=== character name chage. Change this to always work by using edtt variable
*/=== rather than "hard coded" AA() references.
*/=== [JJH 7/24/99]
*/=== Fix bug that causes either GPF fault in LOADS the first hour sun is up
*/=== in a model with SUNPACE = YES in several adjacent spaces.
*/=== LOADS, during its setup in SPMISC, saves space to for solar factors 
*/=== for each "common wall" (a STANDARD INTERNAL-WALL between a SUNSPACE 
*/=== and non SUNSPACE) and each window on such an INTRENAL-WALL. LOADS also 
*/=== converts specified SUNSPACEs with no common walls into non SUNSPACEs.
*/=== The problem arises when a specified SUNSPACE is changed into a 
*/=== non-SUNSPACE; it may have INTERNAL-WALL that suddenly become
*/=== common walls after the count of common walls for the SUNSPACE is already
*/=== complete (when three SUNSPACES are adjacent, the third can become
*/=== a non-SUNSPACE and thus its walls/windows to the 2nd space become
*/=== common, but the saved space for the solar factors for the second
*/=== SUNSPACE have already been saved).  Thus, later on during the LOADS
*/=== calculation of solar to each surface (IWSOL) the solar factors
*/=== for all walls in that sdecond SPACE as well as all following SPACES
*/=== are off by the number of "missed" walls/windows.
*/=== [JJH 7/23/99]
*/=== Add missing items to STNDFL pointer dump
*/=== Fix shading arrays and col-linear checking array to allow polygons to 
*/=== have up to 60 verticies.  Also allow up to 2048 SPACEs.
*/=== [JJH 7/5/2000]

SYSTEMS program

*/=== fix bug in pipe/duct loss calc.  if PIPE&DUCT-ZONE is not specified
*/=== incorrect pointer are used (0) to pick up values; this can cause
*/=== memory protection fault in DOS, GP fault in windows, or just bad
*/=== values for UA's (if it makes it past bad code)
*/=== [JJH 2/7/96]
*/=== change SDSF so that humidification is allowed at the same time cooling
*/=== is being done by the cooling coil.  This assumes that the humidification
*/=== happens in the spaces (assume all spaces have humidifiers).
*/=== [JJH 9/95]
*/=== allow MAX-COND-RECVRY and MAX-HUMIDITY to work together in PSZ
*/=== systems.  Also allow MAX-HUMIDITY to allow a heating requirement
*/=== to still cause cooling to be activated and find the supply temp
*/=== needed to meet the max-hum setpoint. (previously max-hum only
*/=== worked if the AHU was in the cooling mode).
*/=== [JJH 12/13/95]
*/=== fix bug that allowed air to become "super saturated" and thus cause 
*/=== modifier functions to return negative or very large values for
*/=== EIR, Tot Cap, Sen Cap, BF.  This caused an occational divide by 0
*/=== abort or negative compressor electricals.
*/=== [JJH 3/15/96]
*/=== fix bug that allowed a divide by zero when dehumidification
*/=== was thought to be needed but turned out that the required
*/=== temp was .GE. TM (so not needed).
*/=== [JJH 6/6/96]
*/=== fix bug in calc of design CHW zone coil capacity - when COOL-CAPZ was
*/=== specified the calc of CHWCAP6544Z was skipped (for unitary systems).
*/=== This caused a divide by zero when TWO-WAY valves were specified
*/=== in fan coil and induction systems with cooling coils
*/=== [JJH 6/25/96]
*/=== fix bug in RESYS evaporative cooler - did not use correct CFM
*/=== depending on if in heat/evap cool/mech cool modes.  Caused
*/=== the cooling by evap to always be based upon the SUPPLY-CFM
*/=== rather than the evap. cool flowrate.
*/=== [JJH 8/7/96]
*/=== improve the calculation for duct thermal losses
*/=== [sdg 3/28/97]
*/=== fix bug that prevented EXHAUST-FAN-SCH from working.  Whenever
*/=== this schedule was specified the exhaust fan were always off
*/=== (asxs if the schedule was 0 always).  No workaround.
*/=== [JJH 5/6/97]
*/=== prevent divide by zero when S-G natural vent is used and
*/=== a ZONE's SPACE has a negative Z value
*/=== [JJH 5/6/97]
*/=== 1. Fix bug in HP system - fan heat was not being added into mix air
*/=== temp calculation, for either the capacity estimation calc or the
*/=== unit energy calc, so heating was overestimated. No workaround.
*/=== 2. Correct latent calc to take into account compressor operation frac
*/=== so that HP and PTAC systems only remove latent during comp operation
*/=== fix more bugs in HP system 
*/=== 1. when the OA-CONTROL was not set to FIXED bug caused
*/=== overcooling and thus added heating load.  In the estimation
*/=== "iteration" of air temperatures to calc zone temp, the deadband mix
*/=== temperature did not account for dampers closing back to the
*/=== minimum position, so temp could be forced down into the heating
*/=== range rather than float.  No workaround.
*/=== 2. during the second "iteration" (the energy calc) the wrong value
*/=== was used for the minimum OA damper position (used the first iteration
*/=== value rather than the real min pos.  No workaround.
*/=== [JJH 7/4/97]
*/=== fix error in format for no report message
*/=== [JJH 9/10/97]
*/=== fix bug in HP system - when heating-capacity was specified it was
*/=== being set back to 0. because of an incorrect check of HEAT-SOURCE=
*/=== NONE (check was removed as HP always has heating).
*/=== [JJH 9/10/97]
*/=== fix bug in air handler systems - when preheat is present the maximum
*/=== supply temperature was being set incorrectly by not taking into account
*/=== the preheat coil thus the supply temperature could be too low. Usually
*/=== seen when fraction of OA was high so mixed air well below preheat temp.
*/=== or, when cooling is sched off since the past mix temp, used in 
*/=== estimating conditions and limiting the min mix air temp was not 
*/=== being set, so it was zero.
*/=== [WFB/JJH 9/10/97]
*/=== fix bug in refrigeration calculation - for EVAP-CONDENSER the
*/=== user specified value for REFG-PUMP-KW was being set to 0. but
*/=== if no user value was input, the default was calc'd correctly
*/=== [JJH 2/12/98]
*/=== Fix bug in SV-B that cause error during HVAC report process with
*/=== a read beyond record end (and messed up title of report) due to
*/=== SYSTEM having a wrong record length on the blank seperator line
*/=== between groups of five ZONE's output to report
*/=== [JJH 3/19/98]
*/=== Fix bug in PIU system ZONE simulation order sort - it sorted
*/=== all ZONEs rather than just the CONDITIONED ZONEs.
*/=== [JJH 3/20/98]
*/=== for dual fan DD system fix balancing calc to correctly calc hot
*/=== fan size when only cold fan size is specified.  Also fix
*/=== hot fan sizing for CV systems so that hot fan is just sized for
*/=== heating peak not equal to cooling size.
*/=== [JJH 9/15/97]
*/=== bug in saving of min-cfm-ratio's for use by hrly schedules  values (was
*/=== before balancing code, so user specified values were not used when
*/=== values for SUPPLY-CFM and HSUPPLY-CFM were re-calc'd during re-balance
*/=== or re-distribution of user specified fan sizes)
*/=== [JJH 9/15/97]
*/=== bug in desiccant add-on unit for HP system - humitidy control was
*/=== not activated as MAX-HUIMIDITY keyword not used (change BDLKEY also).
*/=== [JJH 9/15/97]
*/=== bug in RESVVT when heatpump is used for heating and supp heat is furnace
*/=== - the adjustment supplemental heat after call to FURNAC to move fuel from
*/=== heating to supp fuel was only moving part since the furnace routine did
*/=== not take into account the portion of the hour in heat mode.  Thus heat
*/=== fuel was too high (double counting supp fuel).
*/=== [JJH 9/15/97] 
*/=== fix bug in fan coil humidification - it was ignored if humidifier
*/=== was not hot water, and in the hot water case it was only counted
*/=== in last zone in the system
*/=== [JJH 9/15/97] 
*/=== improve calc of coil temp depression for MAX-HUMIDITY control
*/=== for the case of single duct air handle with central heat recovery
*/=== or central heating coil (use code for existing case of dry coil
*/=== becomes wet due to MAX-HUMIDITY check)
*/=== [JJH 9/15/97]
*/=== allow OA-FROM-SYSTEM and RECOV-MODE to work together - the recovery
*/=== system uses OA-FROM-SYSTEM return air as the intake and then tries
*/=== to exchange heat between the two streams
*/=== [JJH 10/24/97]
*/=== improve the HAX-HUMIDITY override calc's in DKTEMP to correctly
*/=== know about movable OA dampers as well as coil BF changes as a
*/=== function of entering conditions and coil load
*/=== [JJH 10/25/97]
*/=== fix probelm with estimation of minimum supply temp (TCMIN)
*/=== It was using the past mix air temp as the value for the
*/=== mix air entering the coil for the TCMIN calc when the
*/=== TMMIN - min mix air temp for this hour - should be used.
*/=== This caused TCMIN to be to high in cases when the OA temp
*/=== was droping and the COOL-CAP was max'ed out due to undersizing
*/=== or oversize of SUPPLY-CFM (common in high humidity or humidity
*/=== control problem situations).
*/=== But we will not allow mechanical cooling below MIN-SUPPLY-T
*/=== minus 1/2 COOL-CTRL-RANGE (assume some lockout mechanism).
*/=== Also, replace use of <PASTWOA> (last hour OA system leaving abs. hum)
*/=== with WOA (this hour new estimate) in MAX-HUMIDITY control calc's
*/=== [JJH 10/26/97]
*/=== improve HAX-HUMIDITY override in PSZ SYSTEMS with MAX-COND-RCVRY
*/=== to correctly know that OA can be used for cooling.  Previously
*/=== the MAX-HUMIDITY reset was done after the return/economizer
*/=== calc's, thus if OA could be increased to do cooling this was
*/=== missing and all cooling temp reset was with mechanical cooling.
*/=== [JJH 10/24/97]
*/=== fix MIN-SUPPLY-SCH bug - did not work correctly as the schedule
*/=== pointer was converted from # to ptr twice!
*/=== <MIN-SUPPLY-SCH> = IPTSCH(ITS,<MIN-SUPPLY-SCH>)
*/=== Change SDSF so that PCTON is in QCRUN (#155) and COOL-CLOSS-FPLR
*/=== is set (was only done for GHP/VSHP DX units).
*/=== [JJH 10/28/97]
*/=== Fix bug in design calc's for HP/PTAC system - they both wrongly
*/=== checked for CCoil-CHW delta T >6degF
*/=== [JJH 3/3/98]
*/=== fix entering wetbuld limit - move it up to 60 or ent. drybulb, 
*/=== whichever is lower
*/=== Fix bug in COOL-CONTROL = WARMEST or RESET for single duct air-handlers
*/=== where the cooling supply temperature reset was not over-riding the
*/=== dampers opening in winter, thus the supply temperature was too low.
*/=== This was due to the THMAX (AHU max supply temp) not taking into account
*/=== that the reset could close the OA dampers and thus raise the mix temp
*/=== [JJH 3/18/98]
*/=== fix bugs related to duct losses in systems that cycle or have a
*/=== control zone - also when using RESVVT
*/=== [SDG 1/28/98]
*/=== mods for dual-duct/multizone constant volume mixing boxes - setpoint to be
*/=== midway between heating and cooling setpoint, throttling range spans the
*/=== setpoints
*/=== [SDG 5/12/98]
*/=== Fix bug in dual duct and multi-zone systems.  If the SUPPLY-CFM
*/=== was specified then during the calc to distribute those CFM
*/=== to the ZONES the outside air requirement for ZONEs with an
*/=== ASSIGNED-CFM specified was ignore when calculating the new
*/=== total SYSTEM min outside air requirement used for the min OA
*/=== damper position.  For cases where all ZONEs had ASSIGNED-CFM
*/=== specified, the OA then became 0 and no economizer was present.
*/=== [JJH 9/15/98]
*/=== Fix problems and improve the part load cooling coil performance
*/=== model.  Could produce > saturation coil leaving conditions if
*/=== COIL-BF-FPLR was poor (like the default! which is also changed
*/=== from linear = PLR to linear = 1).  Calc the CBF applying the
*/=== COIL-BF-FPLR to the design value (as described) to represent
*/=== performance for multi-circuit/compressor coils/units (so if
*/=== a single unit/circuit use 1.0 or close to this - by circuit
*/=== I mean controlled by a single value or compressor).  Then
*/=== vary the operating CBF based upon the sensible preformance
*/=== of the coil (i.e., recalc CBF using Tsurf, TM, TC, where 
*/=== Tsurf was calc'd with initial CBF).
*/=== [JJH 9/15/98]
*/=== Fix bug in XFC idents where IEND was changed to IAX, but
*/=== GETBUF was still used which resulted in IAX being incremented
*/=== twice.  Use new routine GETAA (added in SIM) instead of GETBUF.
*/=== [JJH 9/17/98]
*/=== fix verification report-only to work
*/=== fix CURINV routine to use /FILES/ rather than unit numbers as
*/=== this does not work for windows
*/=== [JJH 11/12/98]
*/=== Fix bug that causes report program to die when writing
*/=== summary reports when a SYSTEM had ain illegal HEAT-SOURCE 
*/=== equal to HEAT-PUMP (such as PMZS, DDS).
*/=== [JJH 12/28/98]
*/=== Fix bug that caused loop not to recognize heat/cool modes
*/=== correctly.  Caused by plt/sys commons being out of sync 
*/=== after GHLP subhour changes.
*/=== [SDG 2/3/99]
*/=== Fix bug that kept REPORT-ONLY option from working in SYSTEMS
*/=== due to it causing plant design calc's to be done twice.
*/=== [SDG 2/3/99]
*/=== Fix bug in model of air source heat pump combined with cycling
*/=== indoor fans - 
*/=== the ontime fraction of the unit was always being calculated
*/=== using the combined supp+hp capacity rather than full runtime
*/=== with HP then adding supplemental heat (thus fan runtime was
*/=== underestimated.)
*/=== [JJH 3/10/99]
*/=== first - fix bugs in DKTEMP to get THMXNS (THMAX with no
*/=== supplemental heat) and THMIX (est. TM in heating) calc'd correctly
*/=== Allow PSZ ans SZRH to use central heating coil to reheat
*/=== after humidity control cooling coil.
*/=== [JJH 3/10/99]
*/=== Add auto sizing for baseboards.  
*/=== First set it to LOADS/users peak SPACE load and set the SPACE
*/=== load used to size the air system to zero (this approximates
*/=== using skin loads to size baseboards in air systems).  Then
*/=== after air system is sized, re-size baseboards to take into
*/=== account added/reduced capacity due to air supply temp to ZONE.
*/=== [JJH 3/20/99]
*/=== for zonal units recalc BB sizing based on air system requirement
*/=== don't calc max/min extraction of no AHU capability
*/=== for AHU's recalc BB sizing based on air system requirement
*/=== fix error/warning about too little ZONE heating capacity when
*/=== there is cold air supply system.
*/=== now also apply HEAT-SIZING-RAT
*/=== note: the application of HEAT/COOL-SIZING-RAT's is very
*/=== badly implmented - it is applied after all calc's are
*/=== done rather than during calc process.  Thus most of the
*/=== extraction/addition rate calculations and design conditions
*/=== reported by SV-A and other design reports do not take this
*/=== sizing into effect.  Needs to be corrected (don't hold
*/=== your breath for AEE to do it right.)
*/=== [JJH 3/20/99]
*/=== add BASEBOARD-RATING line to SV-A
*/=== Fix bug in CFM distribution when SUPPLY-CFM is specified and
*/=== DUCT-AIR-LOSS is also specified.  The duct loss was not being
*/=== correctly recalculated based upon specified CFM; it was calc'd
*/=== using ratio of ZONE calc's without those being adjusted for
*/=== the specified losses.
*/=== [JJH 3/24/99]
*/=== Fix bug in air losses to unconditioned zones in RESVVT; losses
*/=== were double counted in DESIGN calculations 
*/=== [JJH 3/24/99]
*/=== Fix bug in DESIGN OA calc in the case of DUCT-AIR-LOSS to an
*/=== unconditioned ZONE combined with specified SUPPLY-CFM.  
*/=== After the recalc of ZONE cfm's using the calculated SUPPLY-CFM,
*/=== the OA fraction was not adjusted for the duct air loss (which
*/=== is made up with OA.
*/=== [JJH 3/24/99]
*/=== Fix design calc bug for DUCT-AIR-LOSS and HDUCT-AIR-LOSS when the 
*/=== loss ZONE is a PLENUM; the return CFM was adjusted for losses but 
*/=== the return temperature did not contain a term for the loss CFM times
*/=== the supply temperature.  Thus the heat/cool design return temp was
*/=== wrong and coils under (cooling) or over (heating) sized.
*/=== [JJH 3/24/99]
*/=== Fix problem in cooling coil sizing calculations for all systems.
*/=== If the LOADS passed OA temp at the time of the cooling peak
*/=== causes a design mixed air temperature that is below the
*/=== MIN-SUPPLY-T a negative cooling capacity results.  This
*/=== is changed to result in a zero cooling capacity.
*/=== Another possibility for a similar error arises from the simple
*/=== correction applied to cooling capacity (total and/or sensible)
*/=== for packaged DX equipment; a (tm-80)*CFM*(1-CBF) factor applied
*/=== could cause the capacity to go negative.  This is also prevented
*/=== [JJH 3/30/99]
*/=== Fix auto sizing calculation for heat pumps - Calc that
*/=== checked that heating and cooling capacities agreed with each
*/=== other (same compressor for both thus capacities are related)
*/=== was incorrectly resetting the heating capacity in many cases
*/=== [JJH 3/31/99]
*/=== Fix problem with minimum supply air temperature not taking into
*/=== account the fan temperature rise; so low limit is really
*/=== MIN-SUPPLY-T - SUPPLY-DELTA-T - (1/2) x COOL-CTRL-RANGE
*/=== [JJH 4/03/99]
*/=== Fix problem in DKTEMP prediction of zone air flows used to
*/=== estimate min/max supply temperature range prior to setting
*/=== AHU supply setpoint.  For SD VAV systems, zones in heating mode
*/=== were using heating max flow time min flow ratio rather than
*/=== box max flow.  For non-reverse action thermostats this double
*/=== multiplied by the min as max heating flow is the min flow.
*/=== [JJH 4/03/99]
*/=== Fix bug in DKTEMP calculation of minimum mix air temp.  It had
*/=== included fan heat even if fan was DRAW-THROUGH, thus the fan
*/=== heat was being added twice to this value.  
*/=== [JJH 4/03/99]
*/=== Also, remove fan heat, if appropriate, from saved coil EDB
*/=== and don't double count it in DualDuct system supply air
*/=== [JJH 4/03/99]
*/=== add the supply and return fan temp rise to hourly reports
*/=== [JJH 4/03/99]
*/=== change TPFC/FPFC to FC and TPIU/FPIU to IU in reports
*/=== Change TERMINAL-TYPE = STD-VAV to be 0 rather than 1 so that the
*/=== keyword can be unused for most system types.
*/=== [JJH 5/10/99]
*/=== Allow humidifier to attach to hw or steam loop
*/=== [SDG 6/5/99]
*/=== Fix bug in DOUBLE routine that did not allow baseboard loads to
*/=== flow on to their circulation loop
*/=== [SDG 6/10/99]
*/=== Fix bug in HTPUMP routine that did not allow baseboard loads to
*/=== flow on to their circulation loop
*/=== [SDG 6/10/99]
*/=== Allow a difference between a BASEBOARD-RATING as unspecified and 0.
*/=== 0. means no baseboard, unspecified (-66666./unfilled) means auto size
*/=== [JJH 6/10/99]
*/=== Fix terminal-type PIU bug added in -034 (change line back)
*/=== Fix recalc of maximum addition rate to include reheat coils
*/=== Split some reheat coil debugging output so seen for electric reheat 
*/=== Fix some delta T warnig messages - make heating dT correct for
*/=== systems with reheat coils. Don't do cooling message for heating
*/=== only systems or heating message for cooling systems.
*/=== Remove extra header in SV-B
*/=== [JJH 7/9/99]
*/=== Allow MIN-OA-METHOD to choose using either a FRAC-OF-DESIGN flow
*/=== or FRAC-OF-HOURLY flow as the definition of the min OA specification
*/=== [JJH 7/9/99]
*/=== Activate HEAT-CONTROL for VAVS, RHFS, PVAVS, PIU when COOL-CONTROL
*/=== is WARMEST.  The will be used to all the AHU to optionally perform 
*/=== heating in the case that WARMEST finds no ZONE requiring cooling.
*/=== [JJH 7/9/99]
*/=== Fix problem introduced in -034 for single zone systems (PSZ, SZRH)
*/=== where the estimated maximum heating temperature was way low due
*/=== to the use of the TC value for heating coil enerting temperature.
*/=== For single zone systems TC is 0 as it is unused.
*/=== [JJH 7/27/99] 
*/=== Fix problem introduced in -034 for DUCT-AIR-LOSS in VAV systems
*/=== where the design return air heating temperature was way low due
*/=== to the use of RCFM rather than RCFMH when calculating it.
*/=== [JJH 7/31/99] 
*/=== Fix bug that in the distribution of ZONE loads/cfm to the
*/=== five minute bins that caused a divide by zero in the case
*/=== where outdoor reset baseboards are on but fan are off; the
*/=== code did not regognize that there was no current heat/cool
*/=== thermostat setpoint of throttling range, but tried to divide
*/=== by the THR.  Changed to check for current setpoints and if
*/=== none active assume ZONE is "floating."
*/=== [JJH 7/18/99]
*/=== Make some debugging output more readable
*/=== [JJH 7/19/99]
*/=== Check for bad SSFCOR calculations; if dT > 20 deg issue message and
*/=== don't use the value.  This allows simulation to continue without
*/=== totally bogus results if something is wrong with calculation.
*/=== [JJH 7/23/99]
*/=== Fix SV-A report to know about baseboard line
*/=== [JJH /7/23/99]
*/=== Fix some design calculations related to reheat coil availability.
*/=== Not all sizing calculations used ZONE level value.
*/=== [JJH /7/23/99]
*/=== Fix design AHU heat coil discharge temperature being incorrect when 
*/=== no central heat coil or preheat coil was requested
*/=== [JJH /7/23/99]
*/=== Remove incorrect reset of MAX-SUPPLY-T that happened when it was
*/=== not specified (=0. really) and also REHEAT-DELTA-T was not specified
*/=== [JJH /7/23/99]
*/=== Fix problem which caused incorrect "insufficient heating capacity"
*/=== message for SYSTEM TYPEs with reheat coils in many cases - the
*/=== message was issued because the maximum addition rate was not
*/=== being recalculated once the reheat coil flow and capacity
*/=== was calculated, but rather later after the bogus warning was already
*/=== issued. Also, don't touch <ERMIND> for PIU non STD-VAV boxes; it
*/=== may be used later to size box fans.
*/=== [JJH 7/24/99]
*/=== Fix the parenthsis error in dT messages from -035
*/=== enlarge dT format width in ERROR message
*/=== Improve reheat coil capacity calculation during rebalance when
*/=== SUPPLY-CFM has been specified
*/=== [JJH /7/24/99]
*/=== For warnings about "insufficient heating capacity" add note that
*/=== this comes from a comparison of heapacity requirements found
*/=== on LS-A and LS-B from the LOADS calculation.
*/=== [JJH 7/24/99]
*/=== Improve ZONE DESIGN extraction calculation when then central AHU
*/=== HEATING-CAPACITY has been specified
*/=== [JJH /7/24/99]
*/=== Add call to collect fan part load information for PIU SYSTEM 
*/=== [JJH 7/24/99]
*/=== Fix some PIU box design calculations (routine DESPIU) problems:
*/===  - change warnings to be more specific
*/===  - correct SERIES box sizing - reheat coils are in box outlet
*/===  - save correct dT EAT-EWT
*/===  - correct PARALLEL sizing - remove SQRT() formulation
*/===      and use the min flow/sqft for heating as over ride
*/=== [JJH 7/24/99]
*/=== Fix problems in PIU system design and hourly calculations.
*/=== In sizing:
*/=== 1) problem where the DUCT-AIR-LOSS was not included
*/=== 2) problem when INDUCED-AIR-ZONE is itself
*/=== 3) detect that more air is induced from a ZONE than
*/===    is being supplied to that ZONE and issue aWARNING
*/===    then change all the ZONE that reference itto 
*/===    induce air from themselves.
*/=== In hourly calc:
*/=== 1) in DKTEMP the DUCT-AIR-LOSS was not included
*/=== 2) DKTEMP/PIU problem when INDUCED-AIR-ZONE is itself
*/=== 3) in DKTEMP/PIU QL and Cinf did not account for exhaust
*/=== [JJH 7/28/99 revised 8/6/99]
*/=== Fix bug in report SS-R where its information was not always
*/=== being saved
*/=== [SDG 8/6/99]
*/=== Allow PIU system with a single ZONE; this is allowed now
*/=== since a PIU can induce from the local ZONE
*/=== [JJH 8/22/99]
*/=== Correct bug in -036 where PIU ZONE reorder did not skip uncond/plen ZONEs
*/=== [JJH 1/31/2000]
*/=== Fix bug in PIU PARALLEL box code where the zone box fan on fraction
*/=== was not being properly reflected into the box flow. This was a problem
*/=== in DKTEMP estimates as well as PIU hourly calc.  Also, fix problem
*/=== where ZONE fan setpoint was allowed to be less than the heating setpoint.
*/=== [JJH 2/9/2000]
*/=== Fix some code that could potentially cause / by zero
*/=== [JJH 2/10/2000]
*/=== Fix bug that prevented heat recovery from working in HP systems
*/=== since RCFM was not set; this made recovery routine think there
*/=== was no return flow (all exhausted.)
*/=== [JJH 4/12/2000]
*/=== Fix bug in SV-B for PIU system that caused record size exceeds
*/=== maximum if SV-B was requested and the ZONEs in the report could
*/=== not fit on a single page (the page eject command to the report
*/=== generator was incorrect.)
*/=== [JJH 4/13/00]
*/=== Prevent divide by zero when refrigeration is specified
*/=== but not for the first temperature range.
*/=== [JJH 5/11/2000]
*/=== Correct bug in sunspace venting where it could not work
*/=== because variables in common were initialzed in SSFCOR
*/=== as data statements but set to 0. in inits
*/=== [JJH 8/23/2000]
*/=== Fix bug in heat recovery.  When scheduled value is less than -1, which
*/=== indicates a cooling or heating recovery is wanted, only heat recovery
*/=== is actually done due to an error in the IF statement not checking for
*/=== an ABS(dT) rather than just dT.
*/=== [JJH 8/21/2000]
*/=== Prevent divide by zero when 
*/=== Fix bug(s) that caused divide by zero in single duct no PIU air
*/=== handler design calc's when either no reheat coil is present and
*/=== a zone D-H-T is equal to the AHU MAX-S-T or when a reheat coil
*/=== is present but the Min-S-T equals the D-C-T plus R-D-T
*/=== [JJH 8/22/00] 
*/=== Fix bug when there are any SUNSPACE=YES spaces.  This caused all results
*/=== to be susspect as the pointer to the first zone ZP1 block for any SYSTEM
*/=== could get reset to the one for the SYSTEM within which the space on the
*/=== ther side of an internal-wall was located.
*/=== [JJH 8/23/2000]

PLANT program

*/=== fix a bug in the dhw routines where they didn't initialize the operating
*/=== capacity correctly
*/=== [SDG 10/1/97]
*/=== revise reports PS-E and PS-F to include the end-use consumption at
*/=== the total peak
*/=== [SDG 4/13/98]
*/=== fix bug in heat-rejection routines - not working properly in some 
*/=== situations where flow was non-zero, but there was no load
*/=== [SDG 5/12/98]
*/=== Fix bug in interior/exterior-kw keywords in METER commands -
*/=== if value for any one is 0 HVAC causes a GP Fault.  This is because
*/=== if KW is zero the schedule value is not converted to a schedule ptr
*/=== [JJH 2/25/98]
*/=== Fix bug in PLANT that caused simulation bomb with invalid file
*/=== unit number - in planti code was using the variable ICTRL for
*/=== a misc. variable, but that is also the CTRL file unit number
*/=== variable, so when it got set to 0 or -1  ... bomb
*/=== [3/19/98 JJH]
*/=== replace GETBUF as it incremented IAX twice
*/=== [JJH 9/17/98]
*/=== Fix loop capacity ratio problem - don't use capacity ratio <1
*/=== if loop was ON previous hour and FLOATING
*/=== [SDG 11/9/98]
*/=== Fix bug in cooling tower design routine - was using wrong variable
*/=== and had not yet been set.
*/=== [11/10/98 SDG]
*/=== Fix bug in cooling tower design routine - was using tower-side    
*/=== flow instead of loop-side flow - the two may be different when
*/=== using a heat-exchanger.
*/=== [11/10/98 SDG]
*/=== Fix bug in PlantReports that caused the monthly values in the PS-H
*/=== report for steam and chw meters to be incorrect.
*/=== [11/16/98 SDG]
*/=== Force loop into floating mode if the net change in loop temperature
*/=== due to a load is less than 0.01F
*/=== [SDG 1/14/99]
*/=== Air-cooled chiller fan power was calculated, but not summed into
*/=== output variable and thus never got to any meter.
*/=== Also modify so used identically to EIR
*/=== [SDG 1/18/99 SDG]
*/=== Fix CHW flow sizing for CHW coil in ZONEs for IU system types 
*/=== - they were set to zero (actually, never calculated.)
*/=== [JJH 2/2/99]
*/=== Fix 2-pipe loop bug - cannot work as program always thinks
*/=== both heat and cool are on due to initialization error.
*/=== [JJH 3/3/99]
*/=== Fix 2-pipe loop bug - loop capacity ratios were not being set 
*/=== properly during the changeover hours.  The result is that cooling
*/=== cooling would be disabled.
*/=== [SDG 3/3/99]
*/=== Fix 2-pipe loop bug - some zonal coil design dTs were using system
*/=== level value instead of zone level value.
*/=== [SDG 3/3/99]
*/=== Cooling tower pan heater bug - a design flow was being calculated
*/=== for an electric pan heater, producing a divide by zero
*/=== [SDG 3/3/99]
*/=== Cooling tower pan heater bug - TWRaux was not being zeroed hourly,
*/=== causing electric pan heat to continuously increase over the hours
*/=== [SDG 3/3/99]
*/=== Bug - The design calcs were failing to multiply zonal condenser
*/=== loads by the zone multiplier, resulting in undersized equipment
*/=== [SDG 3/22/99]
*/=== Bug - Statistics generated a divide by zero during hours when a
*/=== WLHP switched from heating to cooling, but an overload from the
*/=== previous heating hour forced the loop to remain in the heating
*/=== mode.
*/=== [SDG 3/22/99]
*/=== Include heating effect of pump heat in check of heating capacity
*/=== vs. secondary loads.  Not a bug, but reduces the number of 
*/=== times a design warning is issued.
*/=== [SDG 3/22/99]
*/=== When sizing equipment, add additional checks to ensure that the
*/=== loop's flow requirements are met in addition to the load 
*/=== requirements
*/=== [SDG 3/22/99]
*/=== Add pump VFD loss calculations
*/=== [SDG 3/22/99]
*/=== Remove a # sign from a couple of edtt variables for compatibility
*/=== with new UpdateX
*/=== [SDG 3/22/99]
*/=== Fix bug in DRY-COOLER and FLUID-COOLER that causes a X**Y, X<0 and
*/=== Y not interger.  To fix, remove CW sub-hour temperature swing.
*/=== [SDG 3/27/99]
*/=== A primary equipment load such as a charging load from thermal storage
*/=== or an absorption chiller demanding heat could not activate a loop
*/=== operating in the STANDBY mode.  Loads would be met only if the airside
*/=== standby flags were set.
*/=== [SDG 4/5/99]
*/=== Ident GLHX1 introduced a bug whereby the EQUIP-CTRL routine failed to 
*/=== properly allocate load between a storage tank and other equipment when
*/=== the new keyword PRORATE-LOAD = NO.
*/=== [SDG 4/21/99]
*/=== Force LOOP-LOCATION to be 0 if no loop thermal loss.  Since the code 
*/=== uses this value as a flag for thermal losses, and the user can 
*/=== override the default expression, force the location to be zero if
*/=== no thermal losses.
*/=== [SDG 4/21/99]
*/=== Add internal aquastat to dw heaters, allow curves to be active at
*/=== zero net load, prevent negative part-load ratios when a DHW
*/=== circulation-loop temperature setpoint is ever reset downwards
*/=== [SDG 6/5/99]
*/=== Allow humidifier to attach to hw or steam loop
*/=== [SDG 6/5/99]
*/=== Fix bug in FC system when COOLING-CAPACITY is specified that causes
*/=== a divide by zero.  Plant tries to connect a loop when this is just
*/=== a way of specifying a global ZONE coil size.
*/=== [JJH 6/10/99]
*/=== Fix bug PLANT that can cause a divide by zero. Check for a LOOP
*/=== having at least one supplier is incorrect in that and CHW/steam 
*/=== meter is counted as a supplier for all CHW/HW loops.  Change check to
*/=== look for CHW/STEAM meter connected to a particular loop.
*/=== [JJH 6/11/99]
*/=== Fix bug where very small secondary loop loads may not be
*/=== passed on correctly to the primary loop
*/=== [SDG 6/10/99]
*/=== Not a bug - just line up things better
*/=== [SDG 6/10/99]
*/=== Secondary loops sometimes get stuck in a mode where they have a 
*/=== capacity ratio significantly less than their primary loop
*/=== [SDG 6/10/99]
*/=== If PrimaryEquip uses an EQUIP-CTRL to allocate load, but the load
*/=== must be reallocated based on flow, the default flow allocation 
*/=== was incorrect when reusing last hour's equipment mix
*/=== [SDG 6/10/99]
*/=== When using an EQUIP-CTRL to allocate a load, warn if resulting
*/=== flow requirements cannot be met, and program is going to use the
*/=== default allocation routine.
*/=== [SDG 6/10/99]
*/=== Warn when equipment is so small that it can never be used by itself
*/=== because the minimum loop flow requirements are larger
*/=== [SDG 6/10/99]
*/=== When heating loops are simulated with no losses, do not allow
*/=== pump heat to drive loop to an unrealistically high temperature
*/=== when loads are small
*/=== [SDG 6/10/99]
*/=== No bug, just clean up the logic
*/=== [SDG 6/10/99]
*/=== The loop control mode was not being handled correctly between primary
*/=== and secondary loops.  A secondary loop could force its primary off,
*/=== even when there were loads on the primary and/or other secondaries.
*/=== [SDG 7/15/99]  
*/=== In the drycooler, an extremely small load could result in a range
*/=== so small that roundoff errors can produce a divide by zero
*/=== [SDG 11/24/99]
*/=== Bug - Pipe losses to ground failed to convert the ground 
*/=== temperature from Rankine to Fahrenheit.  Same w/ scheduled
*/=== ground-loop heat-exchanger.
*/=== [SDG 3/10/00]
*/=== Bug - Allow user-specified pipe loss dT to be either positive or
*/=== negative and still work 
*/=== [SDG 3/12/00]
*/=== Bug - The pump routine called with zero operating time could 
*/=== divide by zero 
*/=== [SDG 3/12/00]
*/=== Prevent mis-estimated pipe loss from causing the loop temperature
*/=== to float past the environmental temperature
*/=== [SDG 3/12/00]
*/=== When multiple pumps on a loop are overloaded, the Pump routine was
*/=== not taking the number of pumps into account when recalculating the
*/=== balance point.
*/=== [SDG 4/12/00]