McQuay MCK025A Especificações Página 94
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Step 2
From
page 49, the air flow correction factor table, at high speed, the air volume is 1040 CFM and medium speed
is 950 CFM, hence high speed is selected. And the correction factor is hence 1.0.
If lower air flow required, then use the medium and low fan speed. The correction factor can be determined by
getting the ratio of air flow (i.e. medium or low speed / high speed).
Step 3
As the unit is operating at 600m above sea level, the Altitude correction factor is 0.98 total and 0.93 sensible.
Step 4
Multiply the cooling capacities obtained from step 1 (as per specification and design condition) by correction
factors from (2) and (3)
Actual total cooling capacity = 11.7 x 1.0 x 0.98 kW = 11.47 kW
Actual sensible cooling capacity = 8.5 x 1.0 x 0.93 kW = 7.91 kW
Step 5
Water flow rate = Litres/M =
11470 W
= 32.8
70 x 5
Step 6
From Heating Capacity Performance Chart
(Page 138), determine the heating capacity at the nominal air
volume by using the flow rate calculated in step 5. The heating capacity is at 20.6 kW.
Step 7
From Heating Capacity Correction Factor Tables at 70°C water entering temperature and 26.7°C entering air
temperature, the correction factor is 1.1261,
Actual Heating Capacity = 20.6 x 0.98 x 1.1261 = 22.7 kW
Step 8
Water Pressure Drop can be estimated from water Pressure Drop Table
(Page 43 to 48) using interpolate
method:
At flow rate of 32.8 Litres/Min, the nominal pressure drop is 39.14 kPa
Pressure drop correction factor = 1.2947 - 0.0021 x (EWT°C x 1.8 + 32) = 0.9629
Hence the actual pressure drop = nominal pressure drop x correction factor = 37.69 kPa.
MCK-AW
13.00
15.00
17.00
19.00
21.00
12.00 14.00 16.00 18.00 20.00 22.00 24.00 26.00 28.00 30.00 32.00 34.00 36.00 38.00 40.00
Water Flowrate - L/min
Heating Capacity (kW)
MCK020AW
MCK025AW
MCK030AW
MCK040AW
MCK050AW
- Fan Coil Units 1
- Product Line-Up 4
- Space Saving 10
- Zone Control 10
- Water Piping Connection 17
- General Operation Guide 19
- Controller 20
- Operation Guide For G7 21
- ON Timer Setting 22
- Netware3 Wired Controller 23
- SLM3 WIRED CONTROLLER 26
- SLM3 AC5300 26
- Sound Pressure Level 28
- Ducted Split Fan Coil Unit 30
- FAN PERFORMANCE CURVE 31
- MCC 010CW 31
- Fan Performance Curves 31
- MCC 015CW 32
- MCC 020CW 33
- MCC 025CW 34
- MCC 028CW 35
- MCC 030CW 36
- MCC 038CW 37
- MCC 040CW 38
- MCC 050CW 39
- MCC 060CW 40
- MDB 075BW 41
- MDB 100BW 42
- MDB 125BW 43
- MDB 150BW 44
- Water Flow Vs Pressure Drop 45
- Correction Factors 51
- General Data - MWM-GW 52
- General Data - MWM301W 54
- General Data - MCK-AW 55
- General Data - MCK-AWH 58
- General Data - MCK-CW 61
- General Data - MCM-DW 63
- General Data - MCM-CBW 66
- General Data - MCM-EW 68
- General Data - MCC-CW 70
- General Data - MDB-BW 75
- Components Data - MWM-GW 77
- Components Data - MWM301W 78
- Components Data - MCK-AW 79
- Components Data - MCK-AWH 81
- Components Data - MCK-CW 83
- Components Data - MCM-DW 84
- Components Data - MCM-CBW 86
- Components Data - MCM-EW 87
- Components Data - MCC-CW 88
- Components Data - MDB-BW 91
- MCK050AW (ISO) 92
- MWM007GW 95
- MWM010GW 96
- MWM015GW 97
- MWM020GW 98
- MWM025GW 99
- MCM020DW 101
- MCM025DW 102
- MCM030DW 103
- MCM040DW 104
- MCM050DW 105
- MCM007CBW 106
- MCM010CBW 107
- MCM015CBW 108
- MCM015EW 109
- MCM020EW 110
- MCM025EW 111
- MCK020AW 112
- MCK025AW 113
- MCK030AW 114
- MCK040AW 115
- MCK050AW 116
- MCK010CW 117
- MCK015CW 118
- MCK020CW 119
- MCK020AWH 120
- MCK025AWH 121
- MCK030AWH 122
- MCK040AWH 123
- MCK050AWH 124
- MCC010CW 125
- MCC015CW 126
- MCC020CW 127
- MCC025CW 128
- MCC028CW 129
- MCC030CW 130
- MCC038CW 131
- MCC040CW 132
- MCC050CW 133
- MCC060CW 134
- MDB075BW 135
- MDB100BW 136
- MDB125BW 137
- MDB150BW 138
- Wall Mounted Split Type 139
- Ceiling Exposed Split Type 139
- Ceiling Cassette Split Type 140
- Ceiling Concealed Split Type 142
- Ducted Split Type 143
- Indoor Unit 144
- Model : MWM 007GW 144
- Model : MWM 010 / 015 GW 144
- DimensionABCDE 145
- MODEL ABCDEFGH I JKLMNOPQ 146
- Model : MCC 010 / 015CW 150
- Model : MCC 020 / 025 CW 150
- Dimension in mm 151
- Model : MDB 075BW 157
- Model : MDB 100BW 157
- Model : MWM 007 / 010 / 015GW 167
- Model : MWM 020 / 025 GW 167
- Model : MWM 301W 168
- Model : MCK 010 / 015 / 020CW 169
- Model : MCM 007 / 015 CBW 171
- Model : MCM 010 CBW 172
- Model : MWM 0301W 180
- Model : MCM 020 / 025 DW 181
- Model : MCM 030 DW 182
- Model : MCM 040 / 050 DW 183
- Model : MCK-AW 185
- Model : MCK-AW Panel 186
- Model : MCK-CW 187
- Model : MCK-CW Panel 188
- Model : MCC 010 CW 189
- Model : MCC 028 CW 191
- Model : MCC 030 CW 192
- Model : MCC 038 CW 193
- Model : MCC 040 CW 194
- Model : MCC 050 CW 195
- Model : MCC 060 CW 196
- Model : MDB 075 BW 197
- Model : MDB 100 BW 198
- Model : MDB 125 / 150 BW 199
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