Page 127 - Low Temperature Energy Systems with Applications of Renewable Energy

116 Low-Temperature Energy Systems with Applications of Renewable Energy

Table 3.4 4-Tube fan-coil system: Annual energy consumption and mean efficiency
parameters.
4-Tube fan-coil water system Madrid Barcelona Zaragoza Porto
Total thermal consumption (Q T ), kWh 9876.3 3501.1 9332.3 2543.0
Total electrical consumption (W e , T ), kWh 12,629 14,307 15,002 9856
Chiller seasonal (EER) 3.23 3.38 3.20 3.67
Heating circuit pump consumption 19.6 6.9 18.5 5.0
(W p , b ), kWh
Cooling circuit pump consumption 230.6 275.2 271.0 206.9
(W p , ch ), kWh
Dry condenser fan consumption (W f , dc ), 969.1 1004.0 1163.8 641.1
kWh
Max. boiler power (P b , max ), kW 32.6 22.8 36.1 17.4
Max. chiller cooling rate (P ch , max ), kW 22.8 24.8 29.3 21.8

The choice of WLHPS is determined by climatic conditions. In southern latitudes,
air cooling is effectively provided by a chiller-fancoil system. In the northern latitudes
a bivalent system is applied more effectively. In a temperate climate of middle lati-
tudes, it is advisable to use a WLHPS. However, whether a WLHPS is appropriate
or not for any project will be determined by a feasibility study that accounts for tech-
nical and economic considerations [20].

Fig. 3.30 International Energy Conservation Code (IECC) climate regions [19].