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

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Keywords FORTRAN Variables TOT CAP STM-SATURATION-T TSATUR STURB-T TSTURB MAX-NUMBER-AVAIL KAV Description of Calculations 1. Precedence rule - Eng i neer i ng Variables TOT CAP TSATUR TSTURB KAV Description The total design (rated) capacity of each equ i pme nt type (summed over all sizes of a given type). The steam saturation temperature. The temperature of steam entering the steam-turbine generator. The number of units of each equipment type. The first variables calculated in this routine are those associated with the "precedence rule" discussed under the PLANT-EQUIPMENT cOlTf11and in the <strong>DOE</strong>-2 Reference <strong>Manual</strong> (Ref. 2). Briefly, this rule states that, unless the user allocates equipment loads through the use of the LOAD-ASSIGNMENT and the LOAD-MANAGEMENT commands, only one type of boiler, compression chiller, absorption chiller, and cooling tower will be allowed to operate. This rule does not apply to different sizes of the same equipment type. For example, two different sizes of fossil fuel steam boilers can be input without making use of a LOAD-ASSIGNMENT and the program will operate them by default with no difficulty. However, if an electric steam boiler is input in addition to a fossil fuel steam boiler, only the fossil fuel steam boiler' will operate. The reason is that the default allocation algorithms are not general enough to allow more than one type in each equipment category. This is not a serious problem, because it is not very likely that an electric steam boiler would be used in the same plant as a fossil fuel steam boiler. However, if such a combination is to be used, the user must input a LOAD-ASSIGNMENT to instruct the program how they are to be used. 2. Steam data - The steam pressure, temperature, enthalpy and entropy are used in the steam turbine algorithm. The steam saturation temperature is used in the diesel engine and gas turbine generator routines to calculate the heat recoverable from the exhaust gases. a. Steam pressure (FORTRAN variable PSTEAM or PSTURB for steam-turbines) - V.13
If the steam pressure is not input using the STM-PRES keyword, the steam pressure is normally defaulted to 15 psig. For a two-stage absorption chiller or a steam turbine, the steam pressure will default to 150 psig. Finally, if the user inputs a value for the steam-turbine pressure by using the keyword STURB-PRES, the pressure must be at least the default value. b. Steam saturation temperature. (FORTRAN variable TSATUR) - The steam saturation temperature is either user-defined through keyword STM-SATURATION-T or is calculated as a function of the steam pressure: TSATUR = 1 .0017887 _ L.00011429 * In(PSTEAM + 14.7)J - 460 (Ref. 2). c. Steam turbine enthalpy (FORTRAN variable HSTURB) - The entering steam-turbine temperature (FORTRAN variable TSTURB) for enthalpy calculation is either user-defined by keyword STURB-T or it will default to TSATUR + l25'F. The enthalpy is then calculated in subroutine ENTHAL as: HSTURB = [1068.0 - 0.485(PSTURB + 14.7)J + [0.432 + .000953(PSTURB + 14.7)JTSTURB + [0.000036 + (0.496 * 10-6) (PSTURB + 14.7)JTSTURB2 (Ref.2). d. Steam turbine entropy (FORTRAN variable SSTURB) The steam turbine enthropy is calculated in subroutine ENTROP as: SSTURB = 2.385 - (0.4398 * 10-2)TSATUR + (0.8146 * 10-5)TSATUR2 - (0.626 * 10-8)TSATUR3 + 2C(TSTURB _ TSATUR) + (B _ 920C)ln (TSTURB + 460) TSATUR + 460 where B = 0.432 - (0.953 * 10-3 PSTURBl C = (0.36 * 10-4) - (0.496 * 10-b PSTURB) (Ref. 2). 3. Total capacity of equipment type (FORTRAN variable TOTCAP) - The total capacity of each equipment type is set equal to the sum of the design capacities of all equipment of that type. If the installed capacity is greater than the capacity available all at once (see keyword MAX-NUMBER-AVAIL), TOT CAP is set equal to the available capacity. TOT CAP V.14
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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
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The specification of HEAT-SOURCE =
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1. The maximum supply air temperatu
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TH is less than the return air temp
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nsystems CFMP = L CFM ns ' and (IV.
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(1) MIN-SUPPLY-T and (2) TCMIN, as
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Q = - [CFMZ * (TAVE - TC]) (I V. 3
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The specification of HEAT-SOURCE =
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Calculation Algorithms I. Simulate
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THMAX = TM - CONS(l) * ' and (I V.
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If, additionally, it is assumed tha
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6. Update the zone temperature and
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1. The Cooling Mode If PLRC is not
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nsystems CFMP = CFM , and L: ns ns=
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OA-CHANGES * PO = the larger of 60
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total zone heating coil energy cons
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QCS = the smaller of {[ * CVAL(COOL
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II. Simu 1 ate the central fl u i d
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3.2.3. Packaged Terminal Air-Condit
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where QHPT = * CVAL(HEAT-CAP-FT,DB
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lIW = CONS(Z) , the space latent e
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continuously. If no outside ventila
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3.2.4. Unit Heaters and Unit Ventil
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nzones = L (ZKW nz + ZFANKW nz ) *
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nzones QH = L ZQHnz * MULTIPLIER nz
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where ZQH = , if < 0.0 -- if > 0.
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For SYSTEM-TYPEs that do not allow
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thermostat action. an analogous equ
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Step 6. Update the History of the Z
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4.2. Furnace Simulation (subroutine
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would require solving all zone and
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RETURN-DELTA-T = the temperature ga
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TRC is then added to the set point
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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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Page 535 and 536: 2.2.3.5 2.2.3.6 TABLE OF CONTENTS (
Page 537 and 538: TABLE OF CONTENTS (Cont.) 3.2 Syste
Page 539 and 540: 1.2 Communication with Other Progra
Page 541 and 542: 1.3 Simulation Limitations 1. There
Page 543 and 544: 2. ALGORITHM DESCRIPTIONS This sect
Page 546 and 547: --- 0:: ...J ..E:...o:: J: PLR --0
Page 548 and 549: 2.1.4. Effect of Temperature on Ene
Page 552 and 553: is used in many of the equipment ro
Page 554 and 555: Keywords STM-BOILER-HIR HW-BOILER-H
Page 556 and 557: 2.2.2.1.1 Steam or Hot-Water Boiler
Page 558 and 559: This calculation assumes that the e
Page 560 and 561: The fuel consumption during the hou
Page 563 and 564: The skin losses from the boiler are
Page 566 and 567: Keyword ABSORS-HIR ABSOR1-HIR ABSOR
Page 568: 2.2.3.2 Initial Calculations The ca
Page 571 and 572: where LOAD is the load on this type
Page 573 and 574: SIZE MAX-NUMBER-AVAIL Economi c Dat
Page 576 and 577: where AUXIKW is the additional elec
Page 578 and 579: RCAPi = f1 (CHWT,ECT = TTOWR). f1 i
Page 580 and 581: is The compressor load including an
Page 584: Keyword TWR-CELL MAX-GPM TWR-PUMP
Page 588 and 589: (b) If the desired water exit tempe
Page 590: The water flow rate has been set by
Page 593 and 594: It can be seen from Fig. V.12 that
Page 597: 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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