Technibel PMHRV Series - 6 - CORRECTION OF COOLING CAPACITY; 7 - TOTAL HEATING CAPACITIES AND POWER CONSUMPTIONS

10
HEATING CAPACITIES
TOTAL POWER CONSUMPTIONS
-10 -4 0 4 8 12 16
12
14
16
18
20
-8 -2 2 6 10 14-6
26
22
24
50°C
45°C
35°C
-10 -4 0 4 8 12 16
30
40
50
60
80
-8 -2 2 6 10 14-6
70
50°C
45°C
35°C
-10 -4 0 4 8 12 16
12
14
16
18
20
-8 -2 2 6 10 14-6
22
50°C
45°C
35°C
-10 -4 0 4 8 12 16
30
40
50
60
70
-8 -2 2 6 10 14-6
35°C
45°C
50°C
Total input power (kW)
Outdoor wet bulb temperature (°C)
PMHRV
2044
Heating capacity (kW)
Outdoor wet bulb temperature (°C)
Total input power (kW)
Outdoor wet bulb temperature (°C)
PMHRV
2050
Heating capacity (kW)
Outdoor wet bulb temperature (°C)
Water outlet temperature
Water outlet temperature
Water outlet temperature
Water outlet temperature
1.30
1.20
1.10
1.00
0.94
010203040
0
-5
-10
-15
-20
-25
1.19
1.113
6 - CORRECTION OF COOLING CAPACITY
PRINCIPLE OF USING THE CURVES
A- Choose the percentage of glycol according to the
minimum temperature to protect the hydraulic circuit
against frost.
B - Example:
Protection at an external temperature of -15°C, which
gives 30% glycol (freezing points curve).
The loss of capacity is given on the "Reduction of cooling
capacity" curve (0.94).
The new flow is given by the coefficient on the water flow
curve (1.113).
Likewise, to determine the new pressure drop
coefficient in relation to the nominal flow, read the
pressure drop curve (1.19).
Valid curves for setting temperature at the water
inlet.
% in weight of ethylene glycol
Correction factors
Outdoor temperature °
C
Reduction of cooling capacity
Water flow
Pressure drop
Freezing points
• IMPORTANT:
Use monopropylene glycol (a minimum rate of 15% to 20% is needed to avoid any risk of corrosion).
7 - TOTAL HEATING CAPACITIES AND POWER CONSUMPTIONS
∆ T (water) between 4 and 6°K.