HVAC

Term Project

NAME ID

Mahmoud Adnan Fahmi Azem 1933399

Abdallah Ibrahim Abdallah AbuZaid 1932347

Ayham EYAD M. ABUANZEH 1937362

Majd Amin Mohammad Abbad 1933536

Autocad scheme for the apartment
External Wall Thickness (mm) R-Value (m2.K/W)
Gypsum plaster 19.05 0.02624
Air space 0.00 0.16026
LW concrete block 101.60 0.26593
Face brick 101.60 0.07819
Overall U-Value 1.409 W/m2/K
Table (1): Medium Weight Wall

Roof Thickness (mm) R-Value (m2.K/W)

Acoustic tile 19.050 0.31524
Ceiling air space 0.000 0.17622
Steel siding 1.524 0.00004
25mm insulation 25.400 0.58645
10mm felt & membrane 9.525 0.05019
13mm slag or stone 12.700 0.00881
Overall U-value 0.760 W/m2/K
Table (2): Light Weight Roof

Area (m2)
External Walls 17.90
Roof 12.00
Floor 12.00
Windows 2.25*2
Door 2.00
Table (3): Area
 Sample calculations (Living Room)
1-Heating Load Calculations (Based on JORDANIAN CODE):
Ti = 24oC To = 0oC ΔT = 24oC
A) Heat Due External walls:
Q̇ w = Uw Aw ΔT = 1.409×17.90×24oC = 605.306 (W)
B) Heat loss Due Roof:
Q̇ r = Ur Ar ΔT = 0.760×12.00×24 oC = 218.880 (W)
C) Heat loss Due Windows:
Ug = 3.083 (W/m2/K)
Ag = 1.5 ×1.5 = 2.25 (m2)
Q̇ g = Ug Ag ΔT = 3.083×2.25×24 oC = 166.482 (W)
D) Heat loss Due Infiltration:
N = 1.0 (For Living Rooms)
V = 3×4×3.2 = 38.4 (m3)
1250 1250
Q̇ inf = × N × V × ΔT = ×1.0×38.4×24 oC = 320.000 (W)
3600 3600
E) Total Heat:
Q̇ tot. = Q̇ w + Q̇ r + Q̇ g + Q̇ inf = 605.306 + 218.880 + 166.482 + 320.000 = 1310.668 (W)

For Safety = 1310.668 * 1.2 = 1572.802

Q̇ (W)
External Walls 605.306
Roof 218.880
Windows 166.482
Infiltration 320.000
Qtot.* S.F 1572.802
Table (4): Q TOTAL
 2-COOLING LOAD CALCULATION:

Solar time =15

Month (August)
Ti=24oc
From table A-7
T min = 0oc
T max = 38oc
To = T max = 38oc

*To,m= 0.5(T max - T min)=(38+0)*0.5 = 19oc

2 2
*Tadj= Ti +( )( To - Ti) = 24 + ( ) (38-24) = 33.33oc
3 3

A. Heat gain by external wall (living room):

(CLTD)CORR=[(CLTD+LM) *K+(25.5- Ti) +( To.m -29.4)*F]
Ti= 24oc
To.m = 19oc
F=1
k= 0.83(Medium color wall).
CLTD: from group e (mass =303 kg/m2)

LM: from table (9-2)

surface CLTD LM (CLTD)CORR Area(m^2)

N 8 -1.1 -3.173 10.55m2

E 20 0 7.7 7.35m2
 U=1.409w/m2. k

Q` = UA (CLTD)CORR
Q̇ WALL, N = 47.17 W

Q̇ wall,E = 80 W

Q̇ total = 95.68 +174.15=127.17 W

B-heat gain by glass:

Q̇ glass=Q̇ transmitted + Q̇ convected

Q̇ transmitted =A *(SHG)*(SC)*(CLF)

(SHG): from table (9-7)

(SC): From table (9-8) (Double glass, Medium,regular)

(CLF): from table (9-11)

surface SHG SC CLF Area(m2)

N 117 0.9 0.76 2.25
E 691 0.9 0.29 2.25

Q̇ transmitted, north=2.25*117*0.9*0.76=180.063 W
Q̇ transmitted, east =2.25*691*0.9*0.29=405.788 W
Q̇ converted= U window *A*(CLTD)CORR
U=3.083
Ti= 24oc
To,m= 19 oc
F=1 K=1
CLTD=8 (from table 9-12)LM:from table
(9-2)
 Air System Sizing Summary for Living room
Project Name: HVAC project VRF-System 11/19/2022

Prepared by: Group3 12:52PM

surface LM (CLTD)corr Area

N -1.1 -2 2.25
E 0 -0.9 2.25

Q̇ converted, north = 13.873 W

Q̇ converted, east = 6.42 W
Q̇ glass= Q̇ transmitted+ Q̇ converted
Q̇ glass=257.0001+114.03+14.4+6.48=605.961 W

C-heat gain due roof (without suspended ceiling):

Q̇ celing=U*A*(CLTD)CORR
Uceiling=0.76
A=12m2
CLTD(ROOF)=43
LM= -0.5K=0.5
F=1
(CLTD)CORR=12.35
Q̇ ROOF = 112.632 W

D-heat gain by the occupants:

Q̇ occ= n [𝒒̇ sen (CLF)occ+𝒒̇ lat]
n: number of occupants 𝒒̇ lat, 𝒒̇ sen:
from table (4-2)CLF: from table (4-
3)

Hours after the entre the space :(2) Total

hours in space (4)

N 7
Q̇ lat 45
Q̇ sen 70
(CLF)occ 0.8

Q̇ occ=707 w

E-heat gain by lights:

(CLF)Lt (fixture X) = (0.69)
Q̇ Lt=2*32*1*1.2*0.69 = 52.992 W
F-heat bain by infiltration:

Q̇ inf = (𝒗̇ /vo) *(ho-hi)

from table (6-1):

N=1
𝑉̇ =N*V=1.5*4*3*3.2=57.6m3
h=0.016 m3/s

From table (A-7):

&o=40%
&i=50%
Hi= 48 kj/kg, ho = 63 kj/kg, vo = 0.88
Q̇ inf = (0.016/0.88) *(63-48) = 272.7 W

G-total cooling load:

Q̇ total=Q̇ iwall+Q̇ iglass+Q̇ iroof+Q̇ iocc+Q̇ ilight+Q̇ inf

=1877.62*1.2(safety factor)
=2254.35 W

3-Calculating the living room load using HAP sofware

 Air System Sizing Summary for Living room
Project Name: HVAC project VRF-System 11/19/2022

Prepared by: Group3 12:52PM

Air System Information

Air System Name ...................................... Living room Number of zones ............................................................. 1

Equipment Class ............................................... UNDEF Floor Area ................................................................... 12.0 m²

Air System Type ................................................. SZCAV Location .................................................. Amman, Jordan

Sizing Calculation Information

Calculation Months ..................................... Jan to Dec Zone L/s Sizing ................... Sum of space airflow rates

Sizing Data .................................................. Calculated Space L/s Sizing ............... Individual peak space loads

Centr al Cooling Coil Sizing Data

Total coil load ............................................................ 2.7 kW Load occurs at .................................................... Jun 1400

Sensible coil load ...................................................... 2.2 kW OA DB / WB ...................................................... 37.1 / 23.9 °C

Coil L/s at Jun 1400 ................................................. 162 L/s Entering DB / WB .............................................. 26.1 / 18.3 °C

Max block L/s ........................................................... 162 L/s Leaving DB / WB .............................................. 13.8 / 13.0 °C

Sum of peak zone L/s .............................................. 162 L/s Coil ADP ...................................................................... 12.4 °C

Sensible heat ratio ................................................ 0.800 Bypass Factor ........................................................... 0.100

m²/kW ........................................................................ 4.4 Resulting RH .................................................................. 51 %

W/m² ...................................................................... 227.7 Design supply temp. ................................................... 12.2 °C

Water flow @ 10.0 °K rise ...................................... 0.07 L/s Zone T-stat Check .................................................... 1 of 1 OK

Max zone temperature deviation .................................. 0.0 °K

Central Heating Coil Sizing Data

Max coil load ............................................................. 1.6 kW Load occurs at ..................................................... Des Htg

Coil L/s at Des Htg ................................................... 162 L/s W/m² .......................................................................... 134.1

Max coil L/s .............................................................. 162 L/s Ent. DB / Lvg DB ............................................... 17.9 / 26.9 °C

Water flow @ 10.0 °K drop ..................................... 0.04 L/s

Supply Fan Sizing Data

Actual max L/s ............................................................ 162 L/s Fan motor BHP ........................................................... 0.00 BHP

Standard L/s ............................................................. 147 L/s Fan motor kW ............................................................. 0.00 kW

Actual max L/(s-m²) .............................................. 13.46 L/(s-m²) Fan static .......................................................................... 0

Outdoor Ventilation Air Data

Design airflow L/s ....................................................... 21 L/s L/s/person ................................................................... 3.01 L/s/p

L/(s-m²) .................................................................... 1.76 L/(s-m²)

 DESIGN COOLING DESIGN HEATING

COOLING DATA AT Jun 1400 HEATING DATA AT DES HTG

COOLING OA DB / WB 37.1 °C / 23.9 °C HEATING OA DB / WB 0.0 °C / -2.5 °C

Sensible Latent Sensible Latent

ZONE LOADS Details (W) (W) Details (W) (W)

Window & Skylight Solar Loads 5 m² 345 - 5 m² - -

Wall Transmission 17 m² 333 - 17 m² 509 -

Roof Transmission 12 m² 235 - 12 m² 192 -

Window Transmission 5 m² 155 - 5 m² 293 -

Skylight Transmission 0 m² 0 - 0 m² 0 -

Door Loads 0 m² 0 - 0 m² 0 -

Floor Transmission 0 m² 0 - 0 m² 0 -

Partitions 0 m² 0 - 0 m² 0 -

Ceiling 0 m² 0 - 0 m² 0 -

Overhead Lighting 52 W 52 - 0 0 -

Task Lighting 0W 0 - 0 0 -

Electric Equipment 0W 0 - 0 0 -

People 7 472 246 0 0 0

Infiltration - 0 0 - 0 0

Miscellaneous - 0 0 - 0 0

Safety Factor 20% / 20% 319 49 20% 199 0

>> Total Zone Loads - 1911 296 - 1193 0

Zone Conditioning - 1891 296 - 1131 0

Plenum Wall Load 0% 0 - 0 0 -

Plenum Roof Load 0% 0 - 0 0 -

Plenum Lighting Load 0% 0 - 0 0 -

Return Fan Load 162 L/s 0 - 162 L/s 0 -

Ventilation Load 21 L/s 295 251 21 L/s 477 0

Supply Fan Load 162 L/s 0 - 162 L/s 0 -

Space Fan Coil Fans - 0 - - 0 -

Duct Heat Gain / Loss 0% 0 - 0% 0 -

>> Total System Loads - 2186 546 - 1609 0

Central Cooling Coil - 2186 546 - 0 0

Central Heating Coil - 0 - - 1609 -

>> Total Conditioning - 2186 546 - 1609 0

Key: Positive values are clg loads Positive values are htg loads

Negative values are htg loads Negative values are clg loads
4-Error percentage {%E}:
A)Heating

∑ Q̇ total =∑ = Q̇ theo = 1572.802 W

∑ Q̇ HAP =∑ Q̇ Exp = 1600 W

(∑Q̇theo −∑ Q̇Exp)
%E = *100
∑ Q̇theo
1572.802 −1600
= * 100% = 1.729%
1572.802

B)Cooling

∑ Q̇ total =∑ = Q̇ theo = 2254.35 W

∑ Q̇ HAP =∑ Q̇ Exp = 2700 W

(∑Q̇theo −∑ Q̇Exp)
%E = *100
∑ Q̇theo

2254.35 −2700
= * 100% = 19.768%
2254.35

5- calculating the load for the apartment using HAP

software