Air Conditioning Calculation_R0

7/28/2019 Air Conditioning Calculation_R0

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1) U-value calculation for 200 mm common brick wall & partition wall

a. Outside surface resistance (R1) = 0.059 m2C/w

b. 18 mm plaster (R4) = 0.026 m2C/w

c. 200 mm common brick (R3) = 0.279 m2C/w [ From ASHRAE handbook, chapter-26, Table-11]

d. 12 mm plaster (R4) = 0.026 m2C/w

e. Inside surface resistance (R5) = 0.121 m2C/w

1

[R1+R2+R3+R4+R5]

= 1.957 w/m2C

2) U-value calculation for 150 mm light-weight conc. (filled) roof & floor

a. Outside surface resistance (R1) = 0.059 m2C/w

b. 20 mm plaster (R4) = 0.026 m2C/w

c. 150 mm Lightweight conc. (R3) = 0.880 m2C/w

d. 20 mm plaster (R4) = 0.026 m2C/w [ From ASHRAE handbook, chapter-26, Table-11]

e. Inside surface resistance (R5) = 0.121 m2C/w

g. Air resistance (R6) = 0.160 m2C/w

f. Inside under deck insulation rest. (R7) = 0.587 m2C/w

1

[R1+R2+R3+R4+R5]

= 0.899 w/m2C

1

[R1+R2+R3+R4+R5+R6+R7]

= 0.538 w/m2C

Design Heat Transfer Co-efficient (U) Calculation

"U" value for 150 mm light weight conc.

Roof of Top Floor=

"U" value for 200 mm common brick wall &

partition wall=

"U" value for 150 mm light weight conc.

Roof & floor=

Air Conditioning Calculation and Schedule Page 1 of 28


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Input Design Data

Latitude = N

Solar Time considered = 12.00 p.m

CLTD = Cooling Load Temp. Diff. for :Roof = 4.00 C [ From ASHRAE ha

E Wall = 10.00 C

W Wall = 8.00 C

N Wall = 5.00 C [ From ASHRAE ha

S Wall = 6.00 C

LM = latitude-Month Correction for :

Roof = 0.37

E Wall = -0.13

W Wall = -0.13 [ From ASHRAE ha

N Wall = 2.03

S Wall = -3.43

K = Color adjustment

For dark or light colored in an industrial area, K = 1.00

Permanently Medium Colored (rural area), K = 0.83 [ From ASHRAE ha

Permanently Light Colored (rural area), K = 0.65

CLTDg = Cooling Load Temp. Diff. for Glass = 5.00 C [ From ASHRAE ha

CLTD CORRECTION FOR AC SYSTEM

Room Temperature, tR = 22.00 C

Outdoor Temperature, tO = 45.00 C

Calculation

1) CLTD CORRECTION FOR ROOF & WALL (CLTDcorr)

= (CLTD+LM)K+(25.5-tR)+(tO-29.4) :

Roof = 23.47 C

E Wall = 28.97 C

W Wall = 26.97 C

N Wall = 26.13 C

S Wall = 21.67 C

2) CLTD CORRECTION FOR GLASS (CLTDcorr)

= CLTDg+(25.5-tR)+(tO-29.4) : = 24.10 C

COOLING LOAD TEMPERATURE DIFFERENCE (CLTD) CORRECT

21 51'00"


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dbook, chapter-26, Table-29]



dbook]


ON CALCULATION


4/28

Maximum warm condition considered on month of June Solar Time considered 12.P.M.

Space : CCR+CER (Operating Floor) Latitude 21 51' 00" N

Altitude: 268 MSL Correspoing Pressure 0.961

Outdoor Air Condition

:

Considering summer season for outdoor air

Dry bulb temp. (tO) = 45 C

RH (O) = 60 %

Humidity ratio (O) = 0.039 kg moisture / kg dry air

(From psychrometric chart)

Indoor Air Condition

:

Dry bulb temp. (tI) = 22 C

RH (I) = 50 %

Humidity ratio (I) = 0.008 kg moisture / kg dry air


Air Conditioning Area

a.

b.

Make up air volume flow rate (V) as per 1 air change = 1265 m3/hr.

351 L/sec. (See

Make up air volume flow rate (V) as per 0.45 m3 per person = 270 m3/hr.

75 L/sec.

Heat Load Calculation

Heat Gain by Roof & Wall :

=

=

=

=

=

Heat Gain by Conduction, Glass

= 824.9Wall E 5.433 6.300 24.10

75.420 1.957 26.13

1. Total Transmission & Solar Heat Gain by Roof & Wall (watt) 3857

Item Area U factor CLTDCorrected Total

0.000 1.957 28.97

3857.4

Wall S 0.000 1.957 21.67 0.0

Wall N

Area U factor CLTDCorrected

0.0

Wall W 0.000 1.957 26.97 0.0

Wall E

6.770 5.350 137.668

Total

Roof 0.000 0.538 23.47 0.0

Item

Width in m Height in m

12CCR 14.585 6.770 5.350 98.740

CER 20.335

Area in sqm Vol. i

Season Dry bulb temp. in C (DBT) Relative Humidity in % (RHAll 22 50

Considered Aera Length in m

Summer 45 60

CALCULATION FOR AIR CONDITIONING IN CENTRAL CONTROL ROOM

Dry bulb temp. in C (DBT) Relative Humidity in % (RH


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=

=

=

Solar Heat Gain, Glass

SC CLF

0.94 0.36 =

0.94 0.16 =

0.94 0.69 =

0.94 0.51 =

Heat Gain by Partitions, Ceilings, Floors

=

=

=

==

=

Sensible heat

=

Latent heat

=

Heat from lights

CLF

1.00 =

Equipment heat

a. =

b. =

Ventilation & Infiltration

Sensible heat (= 1.23 x V x t) V in L/sec. =

Latent heat (= 3010 x V x ) V in L/sec. =

Supply Air Heat Gain & Leakage Loss ( Considering

3 % of total sensible heat)

Return Air Heat Gain (see note 4)

6. Total Heat Gain By Supply Air Duct 3266

236.408

4. Total Internal Heat Gain By People, Lights & Eqpt. (Watt) 60883

9939.1

32775.0

5. Total Heat Gain By Ventilation & Infiltration (watt) 42714

F (W/m2)

3266.0

Item Heat Load Total

CER 54500 54500.0

750.0

21.5 5082.8

CCR 0 0.0

55 10 550.0

Area (m2)

4889.7

3. Total Heat Gain By Partitions, Ceilings, Floors (Watt)

Total

23451

Sensible Heat Per Person

(watt)Nos of people

Total

Latent Heat Per Person (watt) Nos of people

Total

Wall S 158.799 1.957 23.00

75 10

Floors 236.408 0.899 23.00

Wall W 30.787 1.957 23.00

7147.5Ceilings 236.408 0.899 23.00 4889.7

Item Area U factor t

1385.7

Wall N 83.378 1.957 23.00 3752.8

Wall S 0.000 134.46 0.0

Total

Wall E 30.787 1.957 23.00 1385.7

2. Total Transmission & Solar Heat Gain by Glass (watt) 11286

Wall W 0.000 665.93 0.0

Wall N 13.309 180.14 1555.1

Wall E 0.000 665.93 0.0

Item Area SHGF Total

4254.8

Wall S 28.023 6.300 21.67 3826.1

Wall N 28.023 6.300 24.10

Wall W 5.433 6.300 24.10 824.9


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Grand Total Heat (Q = 1+2+3+4+5+6) in watt

Total Effective Room Sensible Heat (ERSH) in watt

Effective Room total Heat (ERTH) in watt

Effective Room Sensible Heat Factor (ERSHF = ERSH / ERTH)

Apparatus dew point temperature (ADP) in C (from psychrometric chart)

Bypass factor ( BF )

Dehumidified volume (DV = 3.6 x ERSH / 1.15 x (tI -tADP) )

Dehumidified volume with bypass factor (DVBF = DV / ( 1 - BF ) ) in m3 / hr.

Tons of Refrigeration With 10% margin in TR

Selected Equipment Capacity

Factors for checking

1. cfm/sq.ft

2. Air Circulation / hr

3. TR / 100 sq.ft

Notes

1 Shading coefficient (SC), Solar heat gain factor (SHGF) and Cooling load factor (CLF)

data as per ASHRAE handbook, chapter 27 - table-20 and chapter 26 - table-34 & 36.

2 Considering 15 % glass area.

3 Considering 1 air change per hr or 0.45 m3/min, which will be higher for fresh air or make-up air.

4 As heat load for the entire room without false ceiling is calculated, return air heat gain

used not be separately considered.

5 Ref. Area Layout drg. No: AE-N032C01-M-EQL-001-03-R-2

6 The capacities shown are tentative. Vendor to specify the actual capacities on the basis of Plant

Layout and technical specification and submit the same for approval.

1

1

Nos. X TR Note 6 4 x 11 TR

10

0

0.

2

3

Note 6

14

10


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atm

AVR, TSP, GRMP and SYN Panel 6500

System Marshalling, PDB 6500

EOP 500

UPS 1000

Operation Station & Engineering Sta 3000

Printers 2500

Computer (6 Nos) 15000

UPS Battery 2000

Station Battery & DCDB 6000SWAS 1000

I/O Panel, HMI Panel, Governer Pan 10500

Total 54500

note 3) 1265

64.8

m3 (V)

)

Equipement Heat Load Calculation)


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x 36 in

Circular equivalent dia 50.4 in

From chart 7 Friction loss 0.063 in WG per 100 ft of equivalent length

Duct Areas calculated using table 13 and duct sizes table 6.

SUPPLY RETURN

Duct Section Air QuantitCFM Duct Area Duct Actual Area Duct

Capaci Area Size Area Size

CFM % % Sq ft in Sq ft in

Main Duct 18800.00 100 100 13.64296 22X30 3.8918800.00 100 3.89 19.10015 32x26

Main Duct after 1st reduc 15150.73 81 79 10.77794 22x22 3.17 15.08911 20X32

Main Duct after 2nd reduc 11501.45 62 54 7.367199 18x18 2.12 10.31408 20X22

Hand wash & Sitting Lod 7852.18 42.00 26 3.54717 12x14 1.09

To hand wash area 7852.18 42.00 10.5 1.432511 10x6 0.39 4.966038

To Sitting Lodge 0.00 0.00 20.5 2.796807 8x16 0.81 3.91553 12X14

Add equivalent length From table 20

Length

m ft Elbow Contraction

Main Duct 6000 19685 9 19694.04

16x16

Main duct to reception 7258 23812 8 23820.34

Main Duct Library 7184 23570 7 23576.55

Main duct to lobby 7300 23950 6 23956.13

Main duct to CSR Offic 7143 23435 6 23441.04

To CSR Office 10000 32808 3 32811.4

Total 147299.5 ft


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Loss 92.79869 in Wg

Velocity in Las V2 5481 ftm

27.85 m/sec

75% Regain c Regain -1.32 in Wg

Total static pressure at fa 94.27 in Wg 5.6134 m Wg 0.56134

1 0.0254 m Wg 25.4


13/28

per area)

Kg/cm2g

TEEN BUILDING GROUND FLOOR


14/28

3.1764706

Actual

Area

SUPPLY RETURN

Actual Velocity Actual Velocity

13.6429608 fpm m/s fpm m/s5.37 13.6429608 0 0.00 0 0 3501 17.78 0.005

4.12 13.6429608 0 0.00 0 0 4563 23.18 0.005

2.86 13.6429608 0 0.00 0 0 5297 26.91 0.005

13.6429608 0 0.00 0 0 0.005

13.6429608 0 0.00 0 0 0.005

1.09 13.6429608 0 0.00 0 0 7204 36.6 0.005


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16/28

Calculation

1) CLTD CORRECTION FOR ROOF & WALL (CLTDcorr)

= (CLTD+LM)K+(25.5-tR)+(tO-29.4) :

Roof = 21.07 C

E Wall = 26.57 C

W Wall = 24.57 C

N Wall = 23.73 C

S Wall = 19.27 C

2) CLTD CORRECTION FOR GLASS (CLTDcorr)

= CLTDg+(25.5-tR)+(tO-29.4) : = 21.70 C



17/28

Maximum warm condition considered on month of June Solar Time considered 12.P.M.

Space : CCR+CER (Operating Floor) Latitude 21 51' 00" N

Altitude: 268 MSL Correspoing Pressure 0.961 atm

Outdoor Air Condition

:

Considering summer season for outdoor air

Dry bulb temp. (tO) = 45 C

RH (O) = 60 %

Humidity ratio (O) = 0.039 kg moisture / kg dry air


Indoor Air Condition

:Dry bulb temp. (tI) = 24.4 C

RH (I) = 50 %

Humidity ratio (I) = 0.010 kg moisture / kg dry air


Air Conditioning Area

a.

b.

c.

Corridor 16.520 1.505 5.350 551.424.863

68.073Office 1,2,3

8.235 1.230 5.350 10.129

60

13.520

Vol. in m3

(V)

50

Area in sqm

Season Dry bulb temp. in C (DBT) Relative Humidity in % (RH)

5.035

Height in m

CALCULATION FOR AIR CONDITIONING IN OFFICES IN TG BUILDING

Dry bulb temp. in C (DBT) Relative Humidity in % (RH)

Summer 45

All 24.4

Width in m

Corridor

Length in mConsidered Aera

5.350



18/28

Make up air volume flow rate (V) as per 1 air change = 551 m3/hr.

153 L/sec. (See note 3)

Make up air volume flow rate (V) as per 0.45 m3 per person = 405 m3/hr.

113 L/sec.

Heat Load Calculation

Heat Gain by Roof & Wall :

=

=

=

=

=

Heat Gain by Conduction, Glass

=

=

=

=

Solar Heat Gain, Glass

SC CLF

0.94 0.36 =

0.94 0.16 =

0.94 0.69 =

0.94 0.51 =

Heat Gain by Partitions, Ceilings, Floors

=

=

=

=

=

=

112.573

3. Total Heat Gain By Partitions, Ceilings, Floors (Watt)

0.000

0.899 20.60

10755

Ceilings 103.065 0.899 20.60 1909.3

Floors 103.065 1909.3

1198.9

1198.9

0.0

4538.2

20.60

20.60

20.60

20.60

1.957

1.957

1.957

Wall E

Wall W

Wall N

Wall S

0.0

29.741

29.741

6902

Item Area U factor t Total

1.957

10.850

0.000

Wall E

665.93

180.14

134.46

Wall N

Wall S

Wall S 19.866 6.300

717.5Wall W 5.248

Wall N 10.850 1483.3

Wall E 0.000 1.957 26.57

TotalArea U factor CLTDCorrectedItem

Roof 0.000 0.538

0.0

2856

2715.9

2. Total Transmission & Solar Heat Gain by Glass (watt)

Total

21.70

0.0

Area

6.300

665.93 0.0

0.0

1267.7

23.73

Wall S

Wall W

CLTDCorrected

SHGF

Item Area

1.957

1.957

6.300

0.0

1. Total Transmission & Solar Heat Gain by Roof & Wall (watt)

0.000

61.482Wall N

21.706.300

24.57

Total

2855.7

Wall W

U factor

5.248

21.07

19.27

21.70

1.957

0.000

Item

Wall E 717.5

0.0

21.70

0.000

0.000



19/28

Sensible heat

=

Latent heat

=

Heat from lights

CLF

1.00 =

Equipment heat

a. =

b. =

c. =

Ventilation & Infiltration

Sensible heat (= 1.23 x V x t) V in L/sec. =

Latent heat (= 3010 x V x ) V in L/sec. =

Supply Air Heat Gain & Leakage Loss ( Considering

3 % of total sensible heat)

Return Air Heat Gain (see note 4)

Grand Total Heat (Q = 1+2+3+4+5+6) in watt

Corridor 500 500.0

Corridor 500 500.0

75

Sensible Heat Per Person

(watt)Nos of people

Total

5. Total Heat Gain By Ventilation & Infiltration (watt) 17570

F (W/m2)

Office 1,2,3 4579

97454. Total Internal Heat Gain By People, Lights & Eqpt. (Watt)

6. Total Heat Gain By Supply Air Duct

999.4

999

3880.9

13688.8

Item Heat Load Total

Latent Heat Per Person (watt)

55

Area (m2)

2215.921.5103.065

15

Nos of peopleTotal

15 825.0

Total

1125.0

48826

4579.0



20/28

Total Effective Room Sensible Heat (ERSH) in watt

Effective Room total Heat (ERTH) in watt

Effective Room Sensible Heat Factor (ERSHF = ERSH / ERTH)

Apparatus dew point temperature (ADP) in C (from psychrometric chart)

Bypass factor ( BF )

Dehumidified volume (DV = 3.6 x ERSH / 1.15 x (tI -tADP) )

Dehumidified volume with bypass factor (DVBF = DV / ( 1 - BF ) ) in m3 / hr.

Tons of Refrigeration With 10% margin in TR

Selected Equipment Capacity

Factors for checking

1. cfm/sq.ft

2. Air Circulation / hr

3. TR / 100 sq.ft

Notes

1 Shading coefficient (SC), Solar heat gain factor (SHGF) and Cooling load factor (CLF)

data as per ASHRAE handbook, chapter 27 - table-20 and chapter 26 - table-34 & 36.

2 Considering 15 % glass area.

3 Considering 1 air change per hr or 0.45 m3/min, which will be higher for fresh air or make-up air.

4 As heat load for the entire room without false ceiling is calculated, return air heat gain

used not be separately considered.

5 Ref. Area Layout drg. No: AE-N032C01-M-EQL-001-03-R-2

6 The capacities shown are tentative. Vendor to specify the actual capacities on the basis of Plant

Layout and technical specification and submit the same for approval.

14

Note 6

3 x 5.5 TR

29898

6933

32365

0.92

2.08

15.3

6.3

Note 6

7878

Nos. X TR

0.120

10.90



21/28

TOTAL

DEHUMIDIFIED AIR

QUANTITY (CMH)

31799.76CCR & CER

7878.21

DEHUMIDIFIED AIR

QUANTITY PER EQUIPMENT

IN (CMH)

Operating Floor

Offices in TG

Building

4x8800 CMH

3x2900 CMH

SCHEDULE for AIR CONDITIO

AREA

TURBINE BUILDING


22/28

CFM Cap for each room ( Tentati

a. 204.076 81.61897 82

b. 12.6684 5.066651 6c. 33.2906 13.31438 14

250.035 100 100

From AC calculation Total Dehumidified air quantity

31799.76 m3/hr 529.996 m3/min

18716.64 CFM

Say 5300 CFM

Total Air 5300 CFM

Initial Velocity (Considered) 7 m/s

1378 fpm

Operating pressure 0.15 in. wg. 0.00381

Radius elbow R/D 1.25

Initial Duct Area Required 3.846154 Sq ft

From table 6 selected duct size 20 in

x 30 in

Circular equivalent dia 26.6 inFrom chart 7 Friction loss 0.063 in WG per 100 ft of e

Duct Areas calculated using table 13 and duct sizes table 6.

Air Quantity CFM Duct Area Duct Actual

Capacity Area Size Area

CFM % % Sq ft in

5300.00 100 100 3.846154 22X30 3.89

5300.00 100 3.89

3858.06 73 79 3.038462 22x22 3.17

2416.13 46 54 2.076923 18x18 2.12974.19 19.00 26 1 12x14 1.09

268.53 6.00 10.5 0.403846 10x6 0.39

705.66 14.00 20.5 0.788462 8x16 0.81

Add equivalent length calculation From table 20

Length

m ft Elbow Contraction

6000 19685.04 9

Main Duct after 2nd reduction

DUCT SIZING CALCULATION FOR TURBINE BUILDING OPE

To hand wash area

To Sitting Lodge

Main Duct

Main Duct

Main Duct after 1st reduction

Duct Section

AreaConsidered Aera

% Area

Hand wash & Sitting Lodge

Officer's & Staff Dining

Handwash for staffSitting Lounge

Total

SUPPLY


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16x16

7258 23812.34 8

7184 23569.55 7

7300 23950.13 6

7143 23435.04 6

10000 32808.4 3

Total

Loss

Velocity in Last section V2 664.94 ftm

3.377883 m/sec

75% Regain considered Regain 0.068285 in Wg

Total static pressure at fan discharge 92.8804 in Wg 5.6134 m Wg 0.56134

1 0.0254 m Wg 25.4

Main duct to lobby

Main duct to CSR Office

To CSR Office

Main duct to reception

Main Duct Library


24/28


25/28

vely considered as per area)

4325.81 1441.935 250.035 900 15276.33 5092.109 5300.00 18716.64

268.53 250.035 948.31 5300 18716.64

705.66 250.035 2492.00 5300.00 18716.64

5300.00

428

mwg 0.000381 Kg/cm2g

3.176471

10000

Say

uivalent length

Area Duct Actual

Size Area

Sq ft in SUPPLY

Actual Velo3.846154 fpm

5.384615 32x26 5.37 3.846154 4811.474 18716.64 4811.474

4.253846 20X32 4.12 3.846154 4297.958 13624.53 4297.958

2.907692 20X22 2.86 3.846154 4024.726 8532.42 4024.7263.846154 3156.247 3440.31 3156.247

1.4 3.846154 2431.555 948.31 2431.555

1.103846 12X14 1.09 3.846154 3076.547 2492.00 3076.547

19694.04

CFM

RATING FLOOR

Total CFMTotal Area

RETURN


26/28

23820.34

23576.55

23956.13

23441.04

32811.4

147299.5 ft

92.79869 in Wg


27/28


28/28

m3/hr 166.6667 m3/min

5885.778 CFM

5300 CFM

RETURN

city Actual Velocitym/s fpm m/s

24.44229 986.9646 5.01378 0.00508

21.83363 1286.408 6.534951 0.00508

20.44561 1348.974 6.852786 0.0050816.03374 0.00508

12.3523 0.00508

15.62886 246.3601 1.251509 0.00508

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Air Conditioning Calculation_R0

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