Hava Giris Sicakligi °C |
Hava Ozgul Agirligi Kg/³m/Specific Weighttofair kg/³m | Z Katsayisi/Z Coefficient |
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Sicak su icin/For hot water |
Buhar icin/For Steam |
Kaynar su icin/For HTH Water |
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90/70 °C |
0.1 ATU |
0.3 ATU |
0.5 ATU |
1 ATU |
2 ATU |
2.5 ATU |
3 ATU |
4 ATU |
6 ATU |
110/80 °C |
130/90 °C |
150/110 °C |
160/120 °C |
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22
20
18
15
10
5
0
|
1.197
1.205
1.213
1.226
1.248
1.270
1.293
|
0.86
0.97
1.00
1.03
1.12
1.19
1.28 |
0.95
0.98
1.00
1.05
1.13
1.21
1.28 |
0.098
1.04
1.06
1.10
1.18
1.28
1.34 |
1.02
1.08
1.13
1.16
1.24
1.32
1.41 |
1.12
1.18
1.24
1.26
1.29
1.43
1.51 |
1.32
1.37
1.38
1.42
1.48
1.56
1.66 |
1.37
1.42
1.44
1.48
1.54
1.62
1.73 |
1.42
1.47
1.49
1.53
1.59
1.68
1.79 |
1.52
1.57
1.60
1.64
1.71
1.81
1.92 |
1.68
1.73
1.76
1.81
1.87
1.97
2.07 |
0.76
0.82
0.84
0.82
0.92
0.97
1.02 |
0.93
0.98
1.00
1.03
1.08
1.13
1.17 |
1.12
1.20
1.22
1.25
1.30
1.35
1.39 |
1.29
1.32
1.34
1.38
1.43
1.48
1.52 |
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ADA TYPE HEATER |
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Capacities given in the table 2 are valid for fixed conditions. To find out the capacities for different conditions Z Coefficients shown in table 3 shall be used Q: Rated heating capacity (kcal/h) Table 2 tg: Temperature of the inlet air ( C ) Q: Heating capacity under operating conditions (kcal/h) Z: Coefficients Table 3 Selection examples Example 1: selection of an ADA Unit Heater providing 56.000 Kcal/h by 10 C inler air for 90/70 C hot water installation Step 1- For 90/70 C hot water temperature and 10 C inlet air tempe rature Z isdetermined as 1,12 from table 3 Step 2- By applying the formula Q = Q the result is Q =56.000 =50.000 Kcal/h Z 1,12 Selection of the appropriate unit heater type from Table 2 is as follows Selected unit heater type : ADA 50 Approx water preasure drop : 580 mm SS (mm WG) Motor power :1 PS Example 2: The selection of a unit heater supplying 24.000 kcal/h by Using 30 % external air wiht 150/110 C H.T.H.W installation will be as follow in Istanbul, room temperature is selected as 20 C and outside air temperature at 3 C a: tj = room temperature ( C ) td = outside temperature ( C ) tg = temperature of the inlet air ( C ) tg = 0,30 (3) + 0,70(20) 0 13,1 C C b: for 150/110 C H.T.H.W and 13,1 C air inlet temperature Z is determined as 1,269 from table 3 by interpolation Q = Q = 24.000 = 18912 kcal/h Z 1,269 for H.T.H.W system the suitable unit type is selected from table 2 as indicated below. Selected UNIT type = ADA 16 Approx.water presure drop = 44 mm SS Motor power = 1/3 HP Also for % fresh air adjustment there must be inside fresh air mixing box |
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For Turkish | |||||||||||||||||||||||||||||||||||||||||||||||
