Page 126 - Low Temperature Energy Systems with Applications of Renewable Energy

Effective use of heat pumps for various heating applications 115

Fig. 3.29 (A) Water-loop heat pump (WLHP) system; (B) 4-Tube fan-coil water heating,
ventilation and air conditioning (HVAC) system. Q wl,ct, energy discharged, cooling tower;
W p,wl , water loop pump consumption; W p,ct , cooling tower pump consumption; W f,ct, cooling
tower fan consumption [18].

Table 3.3 WLHP system: Annual energy consumption and mean efficiency parameters.
WLHP system Madrid Barcelona Zaragoza Porto

Total thermal consumption (Q T ), kWh 7279.7 2443.3 6786.6 1751.6
Total electrical consumption (W e , T ), kWh 12,974 13,550 14,729 10,140
Heat pumps seasonal COP 4.05 4.07 4.05 4.08
Heat pumps seasonal energy efficiency 3.82 3.82 3.82 3.82
ratio (EER)
Energy evacuated, cooling tower (Q wl,ct ), 46,337 55,287 54,400 41,553
kWh
Water loop pump consumption (W p , wl ), 335.2 362.9 383.7 272.5
kWh
Cooling tower pump consumption 362.5 432.5 425.6 325.1
(W p , ct ), kWh
Cooling tower fan consumption (W f , ct ), 318.8 434.0 405.2 300.6
kWh
Max. boiler power (P b , max ), kW 23.3 16.3 25.8 12.5
Max. cooling tower dissipation rate 80.6 98.7 104.9 79.5
(P ct , max ), kW