cltd mtd
DESCRIPTION
CLTD cooling load calculationTRANSCRIPT
Roof
=
U = 0.3A = 500 m2
Roof No = 13
inside temperature tr = 25 degCdaily range = 11 degC maximum outdoor temperature = 32 degC
Corr. CLTD = CLTD + (25.5 - tr) + (tm - 29.4) = CLTD + (25.5-25) + ( 32-11/2-29.4)= CLTD + -2.4
Time 0900 1000 1100 1200 1300 1400 1500 1600 1700CLTD 9 9 11 13 16 18 21 23 26
Corr. CLTD 6.6 6.6 8.6 10.6 13.6 15.6 18.6 20.6 23.6
U 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
A 500 500 500 500 500 500 500 500 500
990 990 1290 1590 2040 2340 2790 3090 3540
Heat Gain - External Walls
External walls -South wall
=U = 11A = 20m x 4.5m x 80%
= 72 m2
Wall No = 13
Time 0900 1000 1100 1200 1300 1400 1500 1600 1700CLTD 5 5 5 6 7 9 11 12 13
Corr. CLTD 2.6 2.6 2.6 3.6 4.6 6.6 8.6 9.6 10.6
U 11 11 11 11 11 11 11 11 11
A 72 72 72 72 72 72 72 72 72
2059 2059 2059 2851 3643 5227 6811 7603 8395
Q Roof U * A * CLTD Roof Corrected
W /m2.K
Q Roof
Q Wall U * A * CLTD Wall Corrected
W /m2.K
Q3 Wall,S
External walls -East wall
=U = 11A = 25m x 4.5m x 80%
= 90 m2
Wall No = 13
Time 0900 1000 1100 1200 1300 1400 1500 1600 1700CLTD 8 9 12 14 16 16 17 17 17
Corr. CLTD 5.6 6.6 9.6 11.6 13.6 13.6 14.6 14.6 14.6
U 11 11 11 11 11 11 11 11 11A 72 72 72 72 72 72 72 72 72
4435 5227 7603 9187 10771 10771 11563 11563 11563
External walls -North wall
=U = 11A = 20m x 4.5m x 80%
= 72 m2
Wall No = 13
Time 0900 1000 1100 1200 1300 1400 1500 1600 1700CLTD 4 4 4 5 6 6 7 8 8
Corr. CLTD 1.6 1.6 1.6 2.6 3.6 3.6 4.6 5.6 5.6
U 11 11 11 11 11 11 11 11 11A 72 72 72 72 72 72 72 72 72
1267 1267 1267 2059 2851 2851 3643 4435 4435
External walls -West wall
=U = 11A = 25m x 4.5m x 80%
= 90 m2
Wall No = 13
Time 0900 1000 1100 1200 1300 1400 1500 1600 1700CLTD 5 5 5 6 7 9 11 12 13
Q Wall U * A * CLTD Wall Corrected
W /m2.K
Q2 Wall
Q Wall U * A * CLTD Wall Corrected
W /m2.K
Q1 Wall
Q Wall U * A * CLTD Wall Corrected
W /m2.K
Corr. CLTD 2.6 2.6 2.6 3.6 4.6 6.6 8.6 9.6 10.6
U 11 11 11 11 11 11 11 11 11A 72 72 72 72 72 72 72 72 72
2059 2059 2059 2851 3643 5227 6811 7603 8395
Solar - Glass
Solar Glass – North wall
= A * SC * SCL A = 20m x 4.5m x 20%
= 18 m2SC = 0.55
For single story building from Table 35B, having 1 exterior walls, without carpet, Gypsum partition type, without inside shade, the Zone type for glass solar is C.
Q4 Wall
Q Glass Solar (rad)
Time 0900 1000 1100 1200 1300 1400 1500 1600 1700
SC 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55
SCL 85 95 104 107 110 107 101 91 91A 18 18 18 18 18 18 18 18 18
842 941 1,030 1,059 1,089 1,059 1,000 901 901
Solar Glass – South wall
= A * SC * SCL A = 20m x 4.5m x 20%
= 18 m2SC = 0.55
For single story building from Table 35B, having 1 exterior walls, without carpet, Gypsum partition type, without inside shade, the Zone type for glass solar is C.
Time 0900 1000 1100 1200 1300 1400 1500 1600 1700SC 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55
SCL 113 170 221 249 249 221 170 126 104A 18 18 18 18 18 18 18 18 18
1,119 1,683 2,188 2,465 2,465 2,188 1,683 1,247 1,030
Solar Glass – East wall
= A * SC * SCL A = 25m x 4.5m x 20%
= 22.5 m2SC = 0.55
For single story building from Table 35B, having 1 exterior walls, without carpet, Gypsum partition type, without inside shade, the Zone type for glass solar is C.
Time 0900 1000 1100 1200 1300 1400 1500 1600 1700
SC 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55
SCL 457 391 280 195 176 164 148 135 117A 22.5 22.5 22.5 22.5 22.5 22.5 22.5 22.5 22.5
5,655 4,839 3,465 2,413 2,178 2,030 1,832 1,671 1,448
Q1 Glass Solar,N
Q Glass Solar (rad)
Q Glass Solar,S
Q Glass Solar (rad)
Q1 Glass Solar,N
Solar Glass – West wall
= A * SC * SCL A = 25m x 4.5m x 20%
= 22.5 m2SC = 0.55
For single story building from Table 35B, having 1 exterior walls, without carpet, Gypsum partition type, without inside shade, the Zone type for glass solar is C.
Time 0900 1000 1100 1200 1300 1400 1500 1600 1700
SC 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55
SCL 98 107 113 117 186 309 416 482 491A 22.5 22.5 22.5 22.5 22.5 22.5 22.5 22.5 22.5
1,213 1,324 1,398 1,448 2,302 3,824 5,148 5,965 6,076
People
N = 02 person / room x 24 rooms= 48 people
Qs = 75 WQL = 55 W
type, No inside shade, the Zone type for People is C.From Table 37, for Zone type C, at 10hours in space (for 9 hrs) , CLF selected.Time Watts in Table 3
CLF Zone CCooling load (W)
Sensible Latent Sensible Latent0900 48 9 1 75 55 0.92 3,312 26401000 48 9 2 75 55 0.94 3,384 26401100 48 9 3 75 55 0.35 1,260 26401200 48 9 4 75 55 0.28 1,008 26401300 48 9 5 75 55 0.23 828 2640
1400 48 9 6 75 55 0.18 648 2640
1500 48 9 7 75 55 0.15 540 2640
1600 48 9 8 75 55 0.12 432 2640
1700 48 9 9 75 55 0.10 360 2640
Q Glass Solar (rad)
Q1 Glass Solar,N
Q sensible = N (QS) (CLF)
Q latent = N (QL)
For single story building from Table 35B, having 4 exterior walls, without carpet, concrete block partition
No. of people
Hrs in space
Hrs after entry
LightsQ =
No of lights = 01 Light per room x 24 rooms= 24 Nos
Capacity of light = 1,536 Watt= 24 x 1536= 36,864 Watt
type, no inside shade, the Zone type lighting is C.
Time
0900 9 1 36,864 1 1.2 44,237 0.92 40,698 1000 9 2 36,864 1 1.2 44,237 0.93 41,140 1100 9 3 36,864 1 1.2 44,237 0.25 11,059 1200 9 4 36,864 1 1.2 44,237 0.16 7,078 1300 9 5 36,864 1 1.2 44,237 0.13 5,751
1400 9 6 36,864 1 1.2 44,237 0.11 4,866
1500 9 7 36,864 1 1.2 44,237 0.09 3,981
1600 9 8 36,864 1 1.2 44,237 0.08 3,539
1700 9 9 36,864 1 1.2 44,237 0.08 3,539
Appliances
= Qin x Fu x Frx (CLF)
No of computers = 01 per room x 24 rooms= 24 Nos= 24 Nos x 200 Watt
4,800 Watt
From Table 35B, Zone type is C. From Table 39, for 10 hrs in operation (for 9hrs use) CLF is selected.
TimeSensible
0900 4800 9 1 0.89 42721000 4800 9 2 0.91 43681100 4800 9 3 0.5 24001200 4800 9 4 0.4 19201300 4800 9 5 0.33 1584
1400 4800 9 6 0.26 1248
1500 4800 9 7 0.21 1008
W. Ful .Fsa (CLF)
For single story building from Table 35B, having 4 exterior walls, without carpet, concrete block partition
Hrs in operation
Hrs after lights
turned on
Fluorescent
WattageLighting
Use Factor
Lighting special
allowance Factor
Heat Gain/[Watt]
CLF Zone C
Fluorescent
Lighting load
Q Sensible
Assume Fu = 1.0 &Fr = 1.0
Sensible Watts
Hrs in space
Hrs after entry
CLF Zone C
Cooling load (W)
1600 4800 9 8 0.17 816
1700 4800 9 9 0.14 672
Infiltrationq (sensible) = 1.23Q(to-ti)
Assume , air changes = 0.5 ACHQ = 20x25x4.5x.5x1000/3600 l/s
= 312.5 l/s
q (sensible) = 1.23x312.5x(32-25)= 2,691 W
q (latent) = 3010Q (W0-Wi)= 3010x312.5x(0.0225-0.0100)
11,758 Watt