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Ql13.py
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# Python Import
import math
# User Import
from .CabUtils import CabUtils
from .DoorOpen import DoorOpen
class Ql13(CabUtils):
# .=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.==.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=
# Job : CALCULATE CABINET HEAT LOADS FOR CONFIGURATION
# Configuration 3: Top Mount self.R/ F
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
def __init__(self, Cab):
# Calculate overall internal Height, Width and Depth of Freezer
# compartment(FRZ) and the Fresh Food Compartment(FFC)
# Python only
HFFC = WFFC = DC = H2 = D2 = D1 = D3 = 0
AIRSID = loc_RR = AORSID = AIRBCK = AORBCK = AIRFNT = AORFNT = 0
AORBOT = AIRBOT = AIRBTM1 = AORBTM1 = AIRBTM2 = AORBTM2 = AIRBTM3 = AORBTM3 = QWFS = QWFB = 0
# Internal dimensions
loc_HFRZ = Cab.TOPMUL - Cab.TIFT
loc_WFRZ = Cab.WIDTH - Cab.TIFLS - Cab.TIFRS
loc_DFRZ = Cab.DEPTH - Cab.WEDGE - Cab.TIFF - Cab.TIFB - Cab.DGSKT
ALPHA = 0.0
BETA = 0.0
H1 = 0.0
DFFC = 0.0
if Cab.NCCTYPE == 1:
HFFC = Cab.HEIGHT - Cab.TOPMUL - Cab.THMUL - Cab.BINSUL
WFFC = Cab.WIDTH - Cab.TIRLS - Cab.TIRRS
DFFC = Cab.DEPTH - Cab.WEDGER - Cab.TIRF - Cab.TIRB - Cab.DGSKT
if Cab.NCCTYPE == 2:
BETA = math.atan(Cab.CDDN / Cab.CCHGT)
ALPHA = math.pi / 4.0 - BETA / 2.0
H1 = Cab.HEIGHT - Cab.TOPMUL - Cab.THMUL - Cab.BINSUL
HTRIAN = Cab.CCHGT - Cab.BINSUL + Cab.BINSUL / math.sin(BETA) - Cab.TIRB / math.tan(BETA)
DC = Cab.DEPTH - Cab.WEDGER - Cab.TIRF - Cab.TIRB - Cab.DGSKT
H2 = H1 - HTRIAN
D1 = HTRIAN / math.cos(BETA)
D2 = DC - HTRIAN * math.tan(BETA)
WFFC = Cab.WIDTH - Cab.TIRLS - Cab.TIRRS
HFFC = H1
if Cab.NCCTYPE == 3:
BETA = math.atan((Cab.CDDN - Cab.CDUP) / Cab.CCHGT)
ALPHA = math.pi / 4.0 - BETA / 2.0
H1 = Cab.HEIGHT - Cab.TOPMUL - Cab.THMUL - Cab.BINSUL
H2 = H1 - Cab.CCHGT
D1 = Cab.CDUP - Cab.TIRB
if Cab.CDDN == Cab.CDUP:
D2 = Cab.CCHGT - Cab.BINSUL
else:
D2 = (Cab.CDDN - Cab.CDUP) / math.sin(BETA) - Cab.BINSUL * math.tan(ALPHA)
D3 = Cab.DEPTH - Cab.CDDN - Cab.TIRF - Cab.WEDGER - Cab.BINSUL * math.tan(ALPHA) - Cab.DGSKT
DC = Cab.DEPTH - Cab.WEDGER - Cab.TIRF - Cab.TIRB - Cab.DGSKT
WFFC = Cab.WIDTH - Cab.TIRLS - Cab.TIRRS
HFFC = H1
FALPHA = 4.0 * ALPHA / math.pi
FBETA = 2.0 * BETA / math.pi
# Internal Areas
# AMUL IS THE MULLION AREA(FT2)
# UMUL IS THE MULLION OVERALL HEAT TRANSFER(BTU/ HR - FT2 - DEG F)
# Cab.QMULI is the heat leaking into the freezer from the fresh food
AMUL = loc_WFRZ * loc_DFRZ
UMUL = 1.0/(1.0 / Cab.HIFMUL + 1.0 / Cab.HIRMUL + Cab.THMUL / Cab.CKMUL)
Cab.QMULI = UMUL * AMUL * (Cab.TFF - Cab.TFRZ)
# Internal Freezer(F) Areas
AIFSID = loc_HFRZ * loc_DFRZ
AIFTOP = loc_WFRZ * loc_DFRZ
AIFBCK = loc_HFRZ * loc_WFRZ
# External Freezer(F) Areas
AOFSID = (Cab.TOPMUL + Cab.THMUL / 2.0) * (Cab.DEPTH - Cab.WEDGE - Cab.DGSKT)
AOFTOP = Cab.WIDTH * (Cab.DEPTH - Cab.WEDGE - Cab.DGSKT)
AOFBCK = (Cab.TOPMUL + Cab.THMUL / 2.0) * Cab.WIDTH
# Internal Fresh Food(Cab.R) Areas
if Cab.NCCTYPE == 1:
AIRSID = HFFC * DFFC
AIRBOT = WFFC * DFFC
AIRBCK = HFFC * WFFC
AIRFNT = AIRBCK
if Cab.NCCTYPE == 2:
AIRSID = DC * H2 + (DC + D2) * (H1 - H2) / 2.0
AIRBCK = WFFC * H2
AIRFNT = WFFC * H1
AIRBTM1 = WFFC * D1
AIRBTM2 = WFFC * D2
if Cab.NCCTYPE == 3:
AIRSID = DC * H2 + Cab.CCHGT * (D3 + D3 + Cab.CCHGT * math.tan(BETA)) / 2.0
AIRBCK = WFFC * H2
AIRFNT = WFFC * H1
AIRBTM1 = WFFC * (D1 + Cab.BINSUL * math.tan(ALPHA))
AIRBTM2 = WFFC * (D2 + Cab.BINSUL * math.tan(ALPHA))
AIRBTM3 = WFFC * D3
# External Fresh Food(Cab.R) Areas
if Cab.NCCTYPE == 1:
AORSID = (Cab.HEIGHT - Cab.TOPMUL - Cab.THMUL / 2.0) * (Cab.DEPTH - Cab.WEDGER - Cab.DGSKT)
AORBOT = Cab.WIDTH * (Cab.DEPTH - Cab.WEDGER - Cab.DGSKT)
AORBCK = (Cab.HEIGHT - Cab.TOPMUL - Cab.THMUL / 2.0) * Cab.WIDTH
AORFNT = AORBCK
if Cab.NCCTYPE == 2:
AORSID = (Cab.HEIGHT - Cab.TOPMUL - Cab.THMUL / 2.0) * (Cab.DEPTH - Cab.WEDGER - Cab.DGSKT) \
- Cab.CDDN * Cab.CCHGT / 2.0
AORFNT = (Cab.HEIGHT - Cab.TOPMUL - Cab.THMUL / 2.0) * Cab.WIDTH
AORBCK = AORFNT - Cab.CCHGT * Cab.WIDTH
AORBTM1 = Cab.WIDTH * Cab.CCHGT / math.cos(BETA)
AORBTM2 = Cab.WIDTH * (Cab.DEPTH - Cab.CDDN - Cab.WEDGER - Cab.DGSKT)
if Cab.NCCTYPE == 3:
AORSID = (Cab.HEIGHT - Cab.TOPMUL - Cab.THMUL / 2.0) * (Cab.DEPTH - Cab.WEDGER - Cab.DGSKT) \
- (Cab.CDDN + Cab.CDUP) * Cab.CCHGT / 2.0
AORFNT = (Cab.HEIGHT - Cab.TOPMUL - Cab.THMUL / 2.0) * Cab.WIDTH
AORBCK = AORFNT - Cab.CCHGT * Cab.WIDTH
AORBTM1 = Cab.WIDTH * Cab.CDUP
AORBTM2 = Cab.WIDTH * Cab.CCHGT / math.cos(BETA)
AORBTM3 = Cab.WIDTH * (Cab.DEPTH - Cab.CDDN - Cab.WEDGER - Cab.DGSKT)
# The average insulation conductivity. Cab.DKIN is the door
# insulation conductivity. Cab.RKIN is the side, back, top and
# bottom insulation conductivity, i.e. the cabinet.
# FF is the Fresh Food, FZ is the FreeZer
#
TAVGL = 0.25 * (Cab.DKINFF + Cab.DKINFZ + Cab.RKINFF + Cab.RKINFZ)
# Calculate the cabinet heat leak as the sum of the top, sides,
# bottom, front and back heat leaks.
# Note that the cabinet has
# - six wall sections(top, bottom, left side, right side, bottom and back)
# - 12 edges
# - and 8 corners.
# The door, which involves:-
# 4 edges and
# 4 corners,
# has in addition to the edge and corner effect, a gasket and a wedge heat leak added in.
# The shape factor for an edge is 0.54 * Length of the edge.
# The shape factor for a corner is 0.15 * Wall thickness.
# (Holman p. 54).
# note that most corners have two or three insulation thicknesses, thus we average all three thicknesses.
#
# Cab.TIFT: insulation thickness on top(FT)
# Cab.TIFRS: insulation thickness on the Freezer Right side(FT)
# Cab.TIFLS: insulation thickness on the Freezer Left side(FT)
# Cab.TIRLS: insulation thickness on the Left Fresh Food Side(FT)
# Cab.TIRRS: insulation thickness on the Right Fresh Food Side(FT)
# Cab.TIFB: insulation thickness on the Freezer back(FT)
# Cab.TIRB: insulation thickness on the Fresh Food back(FT)
# Cab.TIFF: insulation thickness on the Freezer front(FT)
# Cab.TIRF: insulation thickness on the Fresh Food front(FT)
# Cab.BINSUL: insulation thickness on the bottom(FT)
# Cab.R: conduction resistance.
# It is the sum of the wall resistance plus the edge resistance plus the corner resistance in that order.
# The Left Side Wall Resistance(Cab.R) and heat leak(QLFSID)
# The side walls have two Depth and two Height length edges.
# The edge shape factor is divided by two because each edge is shared by two walls.
# The corner shape factor is divided by three because each corner is shared by three walls.
# (Actually each corner shape factor is divided by 9 because the three corner thicknesses are averaged(9 = 3X3))
# Calculate the heat leak out of the LEFT Freezer Side
#
RF = AIFSID / Cab.TIFLS + 0.54 * (loc_DFRZ + 2.0 * loc_HFRZ) / 2.0 \
+ 0.15 * (2.0 * Cab.TIFLS + Cab.TIFB + 2.0 * Cab.TIFT + Cab.TIFF) / 9.0
R1 = 1.0/(RF * Cab.RKINFZ) + 1.0/(Cab.HILTT * AIFSID)
R2 = 1.0/(Cab.HOLTT * AOFSID)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFRZ, Cab.TFLSID)
Cab.QFLSID = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Calculate the heat leak out of the LEFT Fresh Food Side
if Cab.NCCTYPE == 1:
loc_RR = AIRSID / Cab.TIRLS + 0.54 * (DFFC + 2.0 * HFFC) / 2.0 \
+ 0.15 * (2.0 * Cab.TIRLS + Cab.TIRB + 2.0 * Cab.BINSUL + Cab.TIRF) / 9.0
if Cab.NCCTYPE == 2:
loc_RR = AIRSID / Cab.TIRLS \
+ 0.54 * (H1 + H2 + D1 + D2) / 2.0 \
+ 0.15 * ((2.0 * Cab.BINSUL + Cab.TIRLS) * FALPHA
+ (Cab.TIRB + Cab.TIRLS + Cab.BINSUL) * FBETA
+ (Cab.TIRF + Cab.TIRLS + Cab.BINSUL)
) / 9.0
if Cab.NCCTYPE == 3:
loc_RR = AIRSID / Cab.TIRLS \
+ 0.54 * (H1 + H2 + D1 + D2 + D3) / 2.0 \
+ 0.15 * (2.0 * (2.0 * Cab.BINSUL + Cab.TIRLS) * FALPHA
+ (2.0 * (Cab.TIRLS + Cab.BINSUL)
+ Cab.TIRF + Cab.TIRB)
) / 9.0
R1 = 1.0 / (loc_RR * Cab.RKINFF) + 1.0/(Cab.HILTB * AIRSID)
R2 = 1.0 / (Cab.HOLTB * AORSID)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFF, Cab.TRLSID)
Cab.QRLSID = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Calculate the heat leak out of the RIGHT Freezer Side
RF = AIFSID / Cab.TIFRS + 0.54 * (loc_DFRZ + 2.0 * loc_HFRZ) / 2.0 \
+ 0.15 * (2.0 * Cab.TIFRS + Cab.TIFB + 2.0 * Cab.TIFT + Cab.TIFF) / 9.0
R1 = 1.0/(RF * Cab.RKINFZ) + 1.0/(Cab.HIRTT * AIFSID)
R2 = 1.0/(Cab.HORTT * AOFSID)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFRZ, Cab.TFRSID)
Cab.QFRSID = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Calculate the heat leak out of the RIGHT Fresh Food Side
if Cab.NCCTYPE == 1:
loc_RR = AIRSID / Cab.TIRRS + 0.54 * (DFFC + 2.0 * HFFC) / 2.0 \
+ 0.15 * (2.0 * Cab.TIRRS + Cab.TIRB + 2.0 * Cab.BINSUL + Cab.TIRF) / 9.0
if Cab.NCCTYPE == 2:
loc_RR = AIRSID / Cab.TIRRS \
+ 0.54 * (H1 + H2 + D1 + D2) / 2.0 \
+ 0.15 * ((2.0 * Cab.BINSUL + Cab.TIRRS) * FALPHA
+ (Cab.TIRB + Cab.TIRRS + Cab.BINSUL) * FBETA
+ (Cab.TIRF + Cab.TIRRS + Cab.BINSUL)
) / 9.0
if Cab.NCCTYPE == 3:
loc_RR = AIRSID / Cab.TIRRS \
+ 0.54 * (H1 + H2 + D1 + D2 + D3) / 2.0 + 0.15 \
* (2.0 * (2.0 * Cab.BINSUL + Cab.TIRRS) * FALPHA
+ (2.0 * (Cab.TIRRS + Cab.BINSUL) + Cab.TIRF + Cab.TIRB)) / 9.0
R1 = 1.0/(loc_RR * Cab.RKINFF) + 1.0/(Cab.HIRTB * AIRSID)
R2 = 1.0/(Cab.HORTB * AORSID)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFF, Cab.TRRSID)
Cab.QRRSID = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Calculate the heat leak out of the top(Freezer Only)
# The top has two Depth and two Width length edges
#
Cab.R = AIFTOP / Cab.TIFT + 0.54 * (2.0 * loc_DFRZ + 2.0 * loc_WFRZ) / 2.0 \
+ 0.15 * (2.0 * Cab.TIFLS + 2.0 * Cab.TIFRS + 2.0 * Cab.TIFB + 4.0 * Cab.TIFT + 2.0 * Cab.TIFF) / 9.0
R1 = 1.0/(Cab.R * Cab.RKINFZ) + 1.0 / (Cab.HITOP * AIFTOP)
R2 = 1.0/(Cab.HOTOP * AOFTOP)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFRZ, Cab.TTOP)
Cab.QTOP = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Calculate the heat leak out of the BACK Freezer
# The back has two Height and one Width length edges
Cab.R = AIFBCK / Cab.TIFB + 0.54 * (2.0 * loc_HFRZ + loc_WFRZ) / 2.0 \
+ 0.15 * (Cab.TIFLS + Cab.TIFRS + 2.0 * Cab.TIFB + 2.0 * Cab.TIFT) / 9.0
R1 = 1.0 / (Cab.R * Cab.RKINFZ) + 1.0/(Cab.HIBKT * AIFBCK)
R2 = 1.0 / (Cab.HOBKT * AOFBCK)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFRZ, Cab.TFBACK)
Cab.QFBACK = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Calculate the heat leak out of the BACK Fresh Food
# The back has two Height and one Width length edges
if Cab.NCCTYPE == 1:
Cab.R = AIRBCK / Cab.TIRB + 0.54 * (2.0 * HFFC + WFFC) / 2.0 \
+ 0.15 * (Cab.TIRLS + Cab.TIRRS + 2.0 * Cab.TIRB + 2.0 * Cab.BINSUL) / 9.0
if Cab.NCCTYPE == 2:
Cab.R = AIRBCK / Cab.TIRB + 0.54 * (2.0 * H2 + WFFC * FBETA) / 2.0 + 0.15 \
* (Cab.TIRLS + Cab.TIRRS + 2.0 * Cab.TIRB + 2.0 * Cab.BINSUL) * FBETA / 9.0
if Cab.NCCTYPE == 3:
Cab.R = AIRBCK / Cab.TIRB + 0.54 * (2.0 * H2 + WFFC) / 2.0 \
+ 0.15 * (Cab.TIRLS + Cab.TIRRS + 2.0 * Cab.TIRB + 2.0 * Cab.BINSUL) / 9.0
R1 = 1.0/(Cab.R * Cab.RKINFF) + 1.0/(Cab.HIBKB * AIRBCK)
R2 = 1.0/(Cab.HOBKB * AORBCK)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFF, Cab.TRBACK)
Cab.QRBACK = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Calculate the heat leak out of the FRONT Freezer
# The front has two Height and one Width length edges
#
Cab.R = AIFBCK / Cab.TIFF + 0.54 * (2.0 * loc_HFRZ + loc_WFRZ) / 2.0 \
+ 0.15 * (Cab.TIFLS + Cab.TIFRS + 2.0 * Cab.TIFF + 2.0 * Cab.TIFT) / 9.0
R1 = 1.0/(Cab.R * Cab.DKINFZ) + 1.0/(Cab.HIFTT * AIFBCK)
R2 = 1.0/(Cab.HOFTT * AOFBCK)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFRZ, Cab.TFFRNT)
Cab.QFFRNT = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Calculate the heat leak out of the FRONT Fresh Food
# The front has two Height and one Width length edges
#
Cab.R = AIRFNT / Cab.TIRF + 0.54 * (2.0 * HFFC + WFFC) / 2.0 \
+ 0.15 * (Cab.TIRLS + Cab.TIRRS + 2.0 * Cab.TIRF + 2.0 * Cab.BINSUL) / 9.0
R1 = 1.0/(Cab.R * Cab.DKINFF) + 1.0/(Cab.HIFTB * AIRFNT)
R2 = 1.0/(Cab.HOFTB * AORFNT)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFF, Cab.TRFRNT)
Cab.QRFRNT = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Calculate the heat leak out of the bottom, both
# with and without compressor notch
# The top has two Depth and two Width length edges
if Cab.NCCTYPE == 1:
AOB = AORBOT
AIB = AIRBOT
Cab.R = AIB / Cab.BINSUL + 0.54 * (2.0 * DFFC + 2.0 * WFFC) / 2.0 \
+ 0.15 * (4.0 * Cab.BINSUL + 2.0 * Cab.TIRB + 2.0 * Cab.TIRLS + 2.0 * Cab.TIRRS + 2.0 * Cab.TIRF) / 9.0
R1 = 1.0/(Cab.R * Cab.RKINFF) + 1.0/(Cab.HIBOT * AIB)
R2 = 1.0/(Cab.HOBOT * AOB)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFF, Cab.TBTM)
Cab.QBOTTM = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
if Cab.NCCTYPE == 2:
RB1 = AIRBTM1 / Cab.BINSUL \
+ 0.54 * (WFFC * (FALPHA + FBETA) + 2.0 * D1) / 2.0 \
+ 0.15 * ((2.0 * Cab.TIRB + 2.0 * Cab.BINSUL
+ Cab.TIRLS + Cab.TIRRS) * FBETA
+ (4.0 * Cab.BINSUL + Cab.TIRLS + Cab.TIRRS) * FALPHA
) / 9.0
R1 = 1.0/(RB1 * Cab.RKINFF) + 1.0/(Cab.HIBOT * AIRBTM1)
R2 = 1.0/(Cab.HOBOT * AORBTM1)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFF, Cab.TBTM)
Cab.QBOTTM1 = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
RB2 = AIRBTM2 / Cab.BINSUL \
+ 0.54 * (WFFC * (1.0 + FALPHA) + 2.0 * D2) / 2.0 \
+ 0.15 * ((4.0 * Cab.BINSUL + Cab.TIRLS + Cab.TIRRS) * FALPHA
+ (2.0 * Cab.BINSUL + 2.0 * Cab.TIRF + Cab.TIRLS + Cab.TIRRS)
) / 9.0
R1 = 1.0/(RB2 * Cab.RKINFF) + 1.0/(Cab.HIBOT * AIRBTM2)
R2 = 1.0/(Cab.HOBOT * AORBTM2)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFF, Cab.TBTM)
Cab.QBOTTM2 = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Cab.QBOTTM = Cab.QBOTTM1 + Cab.QBOTTM2
if Cab.NCCTYPE == 3:
RB1 = AIRBTM1 / Cab.BINSUL + 0.54 * (WFFC * (1 + FALPHA) + 2.0 * D1) / 2.0 \
+ 0.15 * ((4.0 * Cab.BINSUL + Cab.TIRLS + Cab.TIRRS) * FALPHA
+ (2.0 * Cab.BINSUL + 2.0 * Cab.TIRB + Cab.TIRLS + Cab.TIRRS)
) / 9.0
R1 = 1.0/(RB1 * Cab.RKINFF) + 1.0/(Cab.HIBOT * AIRBTM1)
R2 = 1.0/(Cab.HOBOT * AORBTM1)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFF, Cab.TBTM)
Cab.QBOTTM1 = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
RB2 = AIRBTM2 / Cab.BINSUL + 0.54 * (2.0 * WFFC * FALPHA + 2.0 * D2) / 2.0 \
+ 0.15 * (8.0 * Cab.BINSUL + 2.0 * Cab.TIRLS + 2.0 * Cab.TIRRS) * FALPHA / 9.0
R1 = 1.0/(RB2 * Cab.RKINFF) + 1.0/(Cab.HIBOT * AIRBTM2)
R2 = 1.0/(Cab.HOBOT * AORBTM2)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFF, Cab.TBTM)
Cab.QBOTTM2 = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
RB3 = AIRBTM3 / Cab.BINSUL + 0.54 * ((1 + FALPHA) * WFFC + 2.0 * D3) / 2.0 \
+ 0.15 * ((4.0 * Cab.BINSUL * Cab.TIRLS + Cab.TIRRS) * FALPHA
+ (2.0 * Cab.BINSUL + 2.0 * Cab.TIRF + Cab.TIRLS + Cab.TIRRS)
) / 9.0
R1 = 1.0/(RB3 * Cab.RKINFF) + 1.0/(Cab.HIBOT * AIRBTM3)
R2 = 1.0/(Cab.HOBOT * AORBTM3)
loc_list = self.getRadHeatFlux(R1, R2, Cab.TFF, Cab.TBTM)
Cab.QBOTTM3 = loc_list[0]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Cab.QBOTTM = Cab.QBOTTM1 + Cab.QBOTTM2 + Cab.QBOTTM3
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# Sum all the heat leaks to get the cabinet heat leak.
Cab.QFRZ = Cab.QFLSID + Cab.QFRSID + Cab.QTOP + Cab.QFBACK + Cab.QFFRNT + Cab.QMUL
Cab.QFFT = Cab.QRLSID + Cab.QRRSID + Cab.QRBACK + Cab.QRFRNT + Cab.QBOTTM - Cab.QMUL
# calculate gasket heat leaks for each compartment and for
# freezer fan on and freezer fan off
if Cab.IRFTYP == 7:
Cab.QGZN = 12.0 * Cab.HLFZG * (2.0 * Cab.TOPMUL + Cab.WIDTH) * (Cab.TROOM - Cab.TFRZ)
Cab.QGZF = Cab.QGZN
Cab.QGR = 12.0 * Cab.HLRG * (2.0 * HFFC + Cab.WIDTH) * (Cab.TROOM - Cab.TFF)
else:
Cab.QGZN = 24.0 * Cab.HLFZG * (Cab.TOPMUL + Cab.WIDTH) * (Cab.TROOM - Cab.TFRZ)
Cab.QGZF = Cab.QGZN
Cab.QGR = 24.0 * Cab.HLRG * (HFFC + Cab.WIDTH) * (Cab.TROOM - Cab.TFF)
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# CALCULATE WEDGE HEAT LEAKS
THETAL = math.atan((Cab.TIFLS - Cab.FLANGE) / Cab.WEDGE)
THETAR = math.atan((Cab.TIFRS - Cab.FLANGE) / Cab.WEDGE)
AWEDGL = Cab.WEDGE * (Cab.TIFLS/(Cab.TIFLS - Cab.FLANGE))
AWEDGR = Cab.WEDGE * (Cab.TIFRS/(Cab.TIFRS - Cab.FLANGE))
BWEDGL = AWEDGL - Cab.WEDGE
BWEDGR = AWEDGR - Cab.WEDGE
WL1 = 2.0 * loc_HFRZ + loc_WFRZ
WL2 = 2.0 * (loc_HFRZ - Cab.FLANGE + Cab.TIFT) + loc_WFRZ + (Cab.TIFLS - Cab.FLANGE) \
+ (Cab.TIFRS - Cab.FLANGE)
Cab.QWFZ = (1.0 / (1.0 / (Cab.HOLTT * Cab.WEDGE * (2.0 * Cab.TOPMUL + Cab.WIDTH))
+ (THETAL/(Cab.WKIN * math.log(AWEDGL / BWEDGL) * (WL1 + WL2) / 2.0)
+ THETAR / (Cab.WKIN * math.log(AWEDGR / BWEDGR) * (WL1 + WL2) / 2.0)) / 2.0)
) * (Cab.TROOM - Cab.TFRZ)
if Cab.WEDGER != 0.0:
THETAL = math.atan((Cab.TIRLS - Cab.FLANGER) / Cab.WEDGER)
THETAR = math.atan((Cab.TIRRS - Cab.FLANGER) / Cab.WEDGER)
AWEDGL = Cab.WEDGER * (Cab.TIRLS/(Cab.TIRLS - Cab.FLANGER))
AWEDGR = Cab.WEDGER * (Cab.TIRRS/(Cab.TIRRS - Cab.FLANGER))
BWEDGL = AWEDGL - Cab.WEDGER
BWEDGR = AWEDGR - Cab.WEDGER
WL = HFFC + Cab.BINSUL - Cab.FLANGER
QWFS = (1.0 / (1.0/(Cab.HOLTB * Cab.WEDGER * 2.0 * HFFC)
+ (THETAL / (Cab.WKINR * math.log(AWEDGL / BWEDGL) * (WL + HFFC))
+ THETAR / (Cab.WKINR * math.log(AWEDGR / BWEDGR) * (WL + HFFC))) / 2.0)
) * (Cab.TROOM - Cab.TFF)
THETA = math.atan((Cab.BINSUL - Cab.FLGB) / Cab.WEDGER)
AWEDGE = Cab.WEDGER * (Cab.BINSUL/(Cab.BINSUL - Cab.FLGB))
BWEDGE = AWEDGE - Cab.WEDGER
WL = Cab.WIDTH - 2.0 * Cab.FLANGER
QWFB = (1.0 / (1.0/(Cab.HOBOT * Cab.WEDGER * Cab.WIDTH)
+ THETA / (Cab.WKINR * math.log(AWEDGE / BWEDGE) * (WFFC + WL) / 2.0))
) * (Cab.TBTM - Cab.TFF)
Cab.QW = Cab.QWFZ + QWFS + QWFB
Cab.QWFF = QWFS + QWFB
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# SUM VARIOUS COMPONENTS OF THE HEAT LEAK
Cab.QGON = Cab.QGR + Cab.QGZN
Cab.QGOF = Cab.QGR + Cab.QGZF
Cab.QTON = Cab.QFRZ + Cab.QFFT + Cab.QGON + Cab.QW
Cab.QTOF = Cab.QFRZ + Cab.QFFT + Cab.QGOF + Cab.QW
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# The heat leak due to Door Openings
obj_doorpn = DoorOpen().DoorpnBuilder() \
.withTempFFSetpoint(Cab.TFF) \
.withTempFZSetpoint(Cab.TFRZ) \
.withHeighFF(HFFC) \
.withWidthFF(WFFC) \
.withDepthFF(DFFC) \
.withHeighFZ(loc_HFRZ) \
.withWidthFZ(loc_WFRZ) \
.withDepthFZ(loc_DFRZ) \
.withMode(Cab.NMOD) \
.withVolumeFZ(Cab.VOLAZ) \
.withVolumeFF(Cab.VOLAR) \
.withRelHumidity(Cab.RELHUM) \
.withTempAirAmbient(Cab.TDRAIR) \
.withOpenHrFF(Cab.FFCOPN) \
.withWaterFF(Cab.WATERF) \
.withWaterFZ(Cab.WATERZ) \
.withOpenHrFZ(Cab.FRZOPN) \
.withHrOpenFF(Cab.HRFFC) \
.withHrOpenFZ(Cab.HRFRZ) \
.build()
lstRes = obj_doorpn.main()
Cab.QDFFCS = lstRes[0]
Cab.QDFFFS = lstRes[1]
Cab.QDFZCS = lstRes[2]
Cab.QDFZFS = lstRes[3]
Cab.QDFFCL = lstRes[4]
Cab.QDFFFL = lstRes[5]
Cab.QDFZCL = lstRes[6]
Cab.QDFZFL = lstRes[7]
return
# .=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.==.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=
# ___________ End of Ql13 class _________________________________________________________________