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E20 SHEET
1 of 1
PREPARED BY
Khairul Anuar Abd Jabar
NAME OF JOB
D35 Upgrade For HVAC System
LOCATION
Miri Serawak
SPACE USED FOR
Electrical Main Room
SIZE
APPROVED
1,460.00
ITEM
HEAT LOAD ESTIMATION FORM
DATE
3.60
m2 X
ESTIMATE FOR
m3
LOCAL TIME SUN TIME
PEAK LOAD
September 4.00 pm
EQUIPMENT OPERATION
SUN GAIN OR TEMP. DIFF
AREA OR QUANTITY
5,256.00
=
FACTOR
LOCAL TIME SUN TIME
HOUR/DAY
10 hours
WATTS CONDITIONS
SOLAR GAIN - GLASS
DB
WB
DP
%RH
g/Kg
OUTDOOR (OA)
NW
GLASS
m2 x
x
0.57
0
ROOM (RM)
NE
GLASS
m2 x
x
0.57
0
DIFFERENCE
SE
GLASS
m2 x
x
0.57
0
SW
GLASS
m2 x
x
0.57
0
m2 x
x
-
-
OUTDOOR AIR PEOPLE x
7
l/s
5,256
l/s =
1,460.01
-
l/s VENTILATION =
1,460.01
Ventilation SKYLIGHT
1 Air change/hr :
0
m3 =
SOLAR & TRANS. GAIN - WALLS & ROOF NW
m2 x
WALL
3.04
x
0
NE
WALL
m2 x
x
3.04
0
SE
WALL
m2 x
x
3.04
0
SW
WALL
m2 x
x
3.04
0
ROOF - SUN
m2 x
x
0
ROOF - SHADED
m2 x
x
0
Infiltration
-
PARTITION
PEOPLE x
OPEN DOORS
DOORS x
l/s per person =
-
l/s per m
-
mX
l/s INFILTRATION =
m2 x
-
x
m2 x
-
x
5.89
APPARATUS DEW POINT & DEHUMIDIFIED AIR QUANTITY
0 0
EFFECTIVE SENSIBLE = HEAT FACTOR
CEILING
m2 x
-
x
0
FLOOR
m2 x
-
x
0
ADP
INDICATED ADP =
INFILTRATION
m2 x
-
x
0
Dehum. Rise
(1-
INTERNAL HEAT PEOPLE
-
x
245
0
POWER
KW
x
1,000.00
0
LIGHTS
WATTS
x
-
ERSH
-
ERTH
= 56.00 C
1.25
-
C - TADP
56.00 -
56.00 C) =
x
0
ADDITIONAL HEAT GAINS
x
0 SUB TOTAL
ERSH
(-
) SUB TOTAL
SAFETY FACTOR
5
%
ROOM SENSIBLE HEAT (RSH) =
OUTDOOR AIR
SUPPLY DUCT LEAK LOSS
%+
SUPPLY DUCT HEAT GAIN
l/s x
1,460.01
-
%+
FAN H.P.
C
x
Outlet Temp. Diff
-
RSH =
-
RSH =
#DIV/0! C (RM - OUTLET AIR)* 1.20
-
x
l/sDA
BF x
g/kg
kg/hr x
0 0
1.2
0
-
10
%
ROOM LATENT HEAT (RLH) =
l/s x
-
g/kg x
0.15
x (TOA
-
CTROOM
0.15 BF x (TEDB
-
C - TADP
-
C) = TEDB
-
56.00 C) = TLDB
TEWB
C,
TEWB
C
47.60 C C
NOTES
0
SUB TOTAL
1,460.01
1,460.01 l/sOA ######## l/s**
C +
**WHEN BYPASSING A MIXTURE OF OUTDOOR AND RETURN AIR, USE SUPPLY l/s, WHEN BYPASSING RETURN AIR ONLY, USE DEHUMIDIFIED l/s.
g/kg x
SUPPLY DUCT LEAKAGE LOSS
56.00
C +
FROM PSYCH. CHART:
0
SAFETY FACTOR
-
0
0
OUTDOOR AIR
TRM
0
0
x
l/sBA
3
ADDITIONAL HEAT GAINS 0.01
l/sDA =
205
x
2310
SQ.m x
-
*IF THIS DT IS TOO HIGH, DETERMINE SUPPLY CFM FOR DESIRED DIFFERENCE BY SUPPLY AIR QUANTITY FORMULA.
0
APPLIANCES, ETC.
VAPOR TRANS.
l/sSA
#DIV/0!
TADP
x
STEAM
CDESIRED DIFF
RESULTING ENT & LVG CONDITIONS AT APPARATUS 0.15
l/s x -
Bypass l/s
#DIV/0!
x
0
LATENT HEAT
PEOPLE
l/s SA
#DIV/0! 1.20
0
%
EFFECTIVE ROOM SENSIBLE HEAT (ERSH) =
INFILTRATION
l/s DA
SUPPLY AIR QUANTITY
0
0
-
(47.60) CDEHUM. RISE
x
Supply l/s x
C
(47.60) C
= 1.20
0
APPLIANCES, ETC.
#DIV/0!
SELECTED ADP =
0.15 BF) x (TRM
Dehum. l/s
m2 x
l/s OA
l/s OUTDOOR AIR THRU APPARATUS =
ESHF
STORAGE
-
l/s per door=
EXHAUST FAN CRACK
TRAN. GAIN - EXCEPT WALLS & ROOF ALL GLASS
SWINGING REVOLVING DOORS
0 0 0
15
%
0
BF x
3
0
EFFECTIVE ROOM LATENT HEAT (ERLH) =
0
EFFECTIVE ROOM TOTAL HEAT (ERTH) =
0
OUTDOOR AIR HEAT SENSIBLE
1,460.01
l/s X
-
Cx
(1-
0.15
BF) x
1.2
0
LATENT
1,460.01
l/s X RETURN DUCT % RSH + LEAKAGE GAIN
-
g/kg x
(1-
0.15
BF) x
3
0
RETURN DUCT HEAT GAIN RETURN AIR OR BLOW - THRU FAN
