DOE-2 Engineers Manual Version 2.1A - DOE-2.com

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II. Simu 1 ate the central fl u i d loop It is assumed that the central fluid loop is constructed such that all units receive fluid at the same temperature. The fluid temperature is calculated each hour by adding the temperature change, caused by the net heat gain or loss of the loop, to the past hour's loop temperature. The net heat gain to the loop (QCZ) is the sum of the gains from all units that are operating in the cooling mode. This total heat gain for each cooling zone is the sum of the zone (space) cooling load (includ·ing fan heat), plus the compressor energy consumption. nzones QCZ = L [ZQC nz + (EIR nz * QCT nz )] * MULTIPLIER nz ' nz=l (IV.442) where QCT = the rated cool ing capacity of the zone unit as defined in Eq. (IV.413). Similarly, the fluid loop heat loss (QHZ) is the sum of the losses from all units that are operating in the heating mode. This total heat loss for each heating zone is the zone (space) heatir.g load (including fan heat) minus the compressor energy consumption. nzones QHZ = L [ZQH nz - (EIR nz * QHT nz)] * MULTIPLIER nz • nz=l (IV. 443) The resultant flui.d loop temperature for the current hour is then calculated as + (QHZ + QCZ) FTEMP = last hour FLUID-HEAT-CAP (IV .444) It is further assumed that the PLANT equipment can maintain the loop temperature between the specified values for MIN-FLUID-T and MAX-FLUID-I. Thus, if the calculated fluid temperature is larger than MAX-FLUID-T, and cooling is scheduled to be on, the cooling load passed to PLANT (QC) is calculated as QC = (FTEMP - MAX-FLUID-T) * FLUID-HEAT-CAP. (IV.445) Similarly for heating, if the calculated fluid temperature falls below MIN-FLUID-T, and heating is scheduled to be on, the heating load passed to PLANT (QH) is calculated as IV.152
QH = (FTEMP - MIN-FLUID-T) * FLUID-HEAT-CAP. (IV.446) Some system-level quantities are saved for reporting. These include the total system electrical energy consumption, nzones = L ZKW nz * MULTIPLIER nz ' nz=l total electrical input for cooling, nzones SKWQC = L EIRnz * QCT nz * MULTIPLIER nz * 0.000293 nz=l (where 0.000293, or 1/3413, converts Btu/hr to kilowatt-hr), total electrical input for heating, nzones SKWQH = - L EIRnz * QHT nz * MULTIPLIER nz * 0.000293, nz=l total fan electrical energy consumption, nzones FANKW = L (FH nz + FC nz ) * MULTIPLIER nz * ' and nz=l total space latent heat gain from people and equipment, nzones QCLAT = L QCLATZ nz * MULTIPLIER nz ' nz=l IV.153 (IV.447) (IV.448) (IV.449) (IV.450) (IV .451)
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DOE-2:ENGINEERS MP.NUAL .( Versi on
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ABSTRACT •...... ACKNOWLEDGMENTS
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TABLE OF CONTENTS (Cont.) Page 2.3.
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TABLE OF CONTENTS (Cont.) III. LOAD
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TABLE OF CONTENTS (Cont). 2.2 Equip
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2.3 TABLE OF CONTENTS (Cont.) Page
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ABSTRACT ••....• ACKNOWLEDGME
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ACK NOWLE DGMENTS This Engineers Ma
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DOE-2 STAFF PERSONNEL Principal Inv
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STATUS - MAY 1981 This edition of t
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SERVICE BUREAU MISSOURI McDonnell-D
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1.4 Volume IV - Engineers Manual Th
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4. CHAPTER I REFERENCES 1. D. A. Yo
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2.4 TABLE OF CONTENTS (Cont.) 2.3.4
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3. CURVE FIT. 4. CHAPTER II REFEREN
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These are the fundamental equations
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1.2 Outline of Algorithm Step 1 Let
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1.3 Description of the Subroutines
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2. WEIGHTING FACTORS by J. F. Kerri
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can be selected for use in 00E-2. T
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t o 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
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In terms of Laplace transfer functi
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This infin ite sequence can be ch a
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The total energy in the pulse is no
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the outside air temperature, and Kv
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calculated from the wall response f
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This is the basis of the air-temper
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TABLE 11.6 LIGHTING DATA FOR WEIGHT
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In the sketch, Rc is the convective
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R' ! Ts Os Circuit A ROO 1 Circuit
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I -'- I + DOE-2 Values -- This Corr
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2.4. Weighting-Factor Subroutines i
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18. Count number of delayed surface
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4. Increment surface counter and in
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emainder, 0.4, to the other walls a
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2.4.S Subroutine WFMATG 2.4.8.1 Sum
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The \/0 \/1 \/2 - d1 WJ. - d(jl2 =
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N WFDDT = L Xi Y i' i=1 where N is
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TABLE 11.10 (Cant. ) Section II.2.3
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Program Variable FLRFUR FLRWT FR FR
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Program Var iab 1e PFA QFLOOR QSi Q
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has been simplified to ZX, etc. The
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5. CHAPTER II INDEX (Cont.)* Duhame
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5. CHAPTER II INDEX (Cont.)* solar.
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III. LOADS SIMULATOR TABLE OF CONTE
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1.2 LOADS Relationship to the Rest
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Within the space loop, but outside
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2.2 Weather 2.2.1 Weather V ariab l
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1061 = the enthalpy of saturated wa
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2 • 3. So 1 ar Cal cu 1 at ion s
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The diffuse radiation for cloudy co
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Step 2 In Eq. (IIL8) the hour angle
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Step 6 10) , where Equation (IILI0)
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The clear sky value is then reduced
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1. A new coordinate system is defin
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then --> --> (V 3 - V 2 ) rV; -V; I
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Step 5. Transformation of the shadi
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2.5 Interior Loads 2.5.1 Interior H
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7. If the user has input a schedule
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PPN TZONER SV ISCHR The
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2.5.2 Calculation of Cooling Loads
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2.6. Heat Conduction Gain 2.6.1. He
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For a wall with no heat capacity, t
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Then, Q = QIN t * XSAREA = [XSQCMP
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and RA = C * UWI where UWI is the i
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where UW = l/(RO + RA + Rl), and th
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Steps 5 through 8 For < 8 and < 2
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2.7. Solar Incident On Surfaces Thi
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uilding, the amount of diffuse sola
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Program Variable SOLID DRGOLGE QDI
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Equation (111.37) is the same as Eq
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4. CHAPTER III INDEX (Cont.)* coord
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4. CHAPTER III INDEX (Cont.)* peopl
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4. CHAPTER III INDEX (Cont.)* so 1
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IV. SYSTEMS SIMULATOR TABLE OF CONT
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1. SYSTEMS OVERVIEW by James J. Hir
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1.3 Simulation of Heat and Moisture
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where Tsurf is the coil surface tem
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ErR PLR=lead 1.0 - - - - - - - - -
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In addition to the types of heating
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air will remain at the mlnlmUm unti
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load is calculated as discussed in
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B. Calculate the supply air and ret
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Otherwise, = the larger of (OA-CHA
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QHM1 = CVAL(HEAT-CAP-FT,DBT,TMZ). H
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= MAX-HEAT-RATE + (HEATING-CAPACITY
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If the user has specified COOLING-C
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(1) (2 ) where MAX-SUPPL Y-T = MIN-
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QHMI = CVAL{HEAT-CAP-FT,DBT,TMIN),
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it is possible to use TC and TMAX i
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3. SYSTEM SIMULATION ROUTINES 3.1 C
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This is the temperature that will b
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exhaust fan energy consumption, nzo
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nsystems CFMP = L ns=l TMP = CFM ,
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The mixed air controller set point
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COIL-BF-FCFM is a correction functi
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MIN-UNLOAD-RATIO is equal to 1. 0,
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ERMAXM = CONS(l) * CFMIN * «TNOW>
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D. Calculate the mixed air temperat
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WMM = [(1.0 + F) * WRMINJ - ow - (F
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If variable-air-volume control to t
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3.1.5 Ceiling Induction System (sub
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Because the baseboard heaters are a
Page 386 and 387: The specification of HEAT-SOURCE =
Page 388 and 389: 1. The maximum supply air temperatu
Page 391: TH is less than the return air temp
Page 395 and 396: nsystems CFMP = L CFM ns ' and (IV.
Page 397 and 398: (1) MIN-SUPPLY-T and (2) TCMIN, as
Page 399 and 400: Q = - [CFMZ * (TAVE - TC]) (I V. 3
Page 402 and 403: The specification of HEAT-SOURCE =
Page 404 and 405: Calculation Algorithms I. Simulate
Page 406 and 407: THMAX = TM - CONS(l) * ' and (I V.
Page 408: If, additionally, it is assumed tha
Page 416 and 417: 6. Update the zone temperature and
Page 418: 1. The Cooling Mode If PLRC is not
Page 423 and 424: nsystems CFMP = CFM , and L: ns ns=
Page 425: OA-CHANGES * PO = the larger of 60
Page 428 and 429: total zone heating coil energy cons
Page 431: QCS = the smaller of {[ * CVAL(COOL
Page 440 and 441: 3.2.3. Packaged Terminal Air-Condit
Page 443: where QHPT = * CVAL(HEAT-CAP-FT,DB
Page 446 and 447: lIW = CONS(Z) , the space latent e
Page 448: continuously. If no outside ventila
Page 451 and 452: 3.2.4. Unit Heaters and Unit Ventil
Page 455 and 456: nzones = L (ZKW nz + ZFANKW nz ) *
Page 457 and 458: nzones QH = L ZQHnz * MULTIPLIER nz
Page 459: where ZQH = , if < 0.0 -- if > 0.
Page 465 and 466: For SYSTEM-TYPEs that do not allow
Page 467 and 468: thermostat action. an analogous equ
Page 470 and 471: Step 6. Update the History of the Z
Page 472 and 473: 4.2. Furnace Simulation (subroutine
Page 475 and 476: would require solving all zone and
Page 478: RETURN-DELTA-T = the temperature ga
Page 481: TRC is then added to the set point
Page 485 and 486: D. If COOL-CONTROL = RESET, TC is c
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where WSURF A - B - C = (1.0 - CBF)
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In this control simulation, the ent
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4.4. Outside Air Control (subroutin
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4.5 Calculation of Fan Energy Consu
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and PLS PLR PWR S - no--=-- , for s
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4.7 Calculation of Humidity Ratio (
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6. CHAPTER IV INDEX* air handler, c
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6. CHAPTER IV INDEX* (Cont.) coolin
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6. CHAPTER IV INDEX* (Cont.) econom
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6. CHAPTER IV INDEX* (Cont.) four p
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6. CHAPTER IV INOEX* (Cant.) multiz
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6. CHAPTER IV INDEX* (Cant.) packag
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6. CHAPTER IV INDEX* (Cont.) packag
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6. CHAPTER IV INDEX* (Cont.) packag
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6. CHAPTER IV INOEX* (Cont.) packag
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6. CHAPTER IV INDEX* (Cant.) supply
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6. CHAPTER IV INDEX* (Cont.) two-pi
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6. CHAPTER IV INDEX* (Cont.) unitar
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6. CHAPTER IV INDEX* (Cont.) variab
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2.2.3.5 2.2.3.6 TABLE OF CONTENTS (
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TABLE OF CONTENTS (Cont.) 3.2 Syste
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1.2 Communication with Other Progra
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1.3 Simulation Limitations 1. There
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2. ALGORITHM DESCRIPTIONS This sect
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--- 0:: ...J ..E:...o:: J: PLR --0
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2.1.4. Effect of Temperature on Ene
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Keywords FORTRAN Variables TOT CAP
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is used in many of the equipment ro
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Keywords STM-BOILER-HIR HW-BOILER-H
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2.2.2.1.1 Steam or Hot-Water Boiler
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This calculation assumes that the e
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The fuel consumption during the hou
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The skin losses from the boiler are
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Keyword ABSORS-HIR ABSOR1-HIR ABSOR
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2.2.3.2 Initial Calculations The ca
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where LOAD is the load on this type
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SIZE MAX-NUMBER-AVAIL Economi c Dat
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where AUXIKW is the additional elec
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RCAPi = f1 (CHWT,ECT = TTOWR). f1 i
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is The compressor load including an
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Keyword TWR-CELL MAX-GPM TWR-PUMP
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(b) If the desired water exit tempe
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The water flow rate has been set by
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It can be seen from Fig. V.12 that
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APP = TTOWR - TWBDES, where TWBDE5
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number of double bundle chillers +
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Step S. Determine the approach for
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The power is then equa 1 to the pow
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With the exception of heat recovery
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where TOTCAP19 is the heat storage
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TFREZH is the fluid freezing point
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500,000 MBtu of jacket heat will be
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a. If the tank has been defined in
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Equations (V.29) through (V.32) are
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The pumps are not explicitly define
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V ar i ab 1 eli s t: Keywords FORTR
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FORTRAN Engineering Keywords Variab
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The heat exchanger UA factor is ass
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Keyword FORTRAN Engineering Variabl
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FORTRAN Engineering Keyword Variabl
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The load that has just been allocat
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2. RElCOM = where HIRNOMi correspon
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or ECOOLT or CAPA, whichever is sma
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priority on the generator heat. The
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g. The coupled absorption chiller l
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Step 8. Step 9. Step 10. Step II. S
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Step 34. Recalculate the excess ste
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where KAVQi : KAVi + 1. KAVi in tur
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2.3 Economic Calculations Calculati
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Keywords UNIT INSTALLATION ESCALATI
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2.3.1 Equipment Costs (subroutines
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(V.llO) Cyclical Costs. The equipme
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Step 6 The cyclical cost coefficien
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Q * p-mo Qblock = M Fbill (U29) whe
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4. CHAPTER V REFERENCES 1. J. J. Al
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5. CHAPTER V INDEX (for non-solar e
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1. DESCRIPTION OF THE LIFE-CYCLE CO
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1.3 Cost Types In ooE-2, non-energy
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1.5 Calculation of Investment Stati
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1.6 Subroutine Deser iption RDESF R
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DAYLIGHTING CALCULATION IN DOE-2 Fr
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1. Introduction DAYLIGHTING CALCULA
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a b c Fig. 2. Window with diffusing
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Fig. 5. Sun height' 20° Sun height
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, ¢sun ¢sun,deg L z y altitude of
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New York Ci ty, NY .34 .33 .40 .54
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The background luminance, L b , is
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(1) One or more coordinates of the
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specified. ( 4) Print error message
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where GILSK and GILSU are the illum
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• 3. A shade is left open if the
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