Heating, cooling, air-conditioning and ventilation devices are becoming increasingly important in residential buildings. Energy characteristics of these devices have a very strong effect. These devices are very important in new buildings and in renovation of old buildings.
Energy characteristics of the devices were determined experimentally. The characteristic for the heat emission of the heater was determined according to various values of water temperature in the heater. The characteristic for the boiler (the heating device) was determined by the direct method according to the thermal fluxes. Recuperator efficiency or characteristic was determined according to various intensities of the fans. The characteristic of the ventilation convector was determined by PID control.
We established that numerous factors influence the energy characteristics: different temperatures in the heater, fuel composition, thermal fluxes of the fuel and of the heated medium, intensity of the heater in the air ventilation system, intensity of the fans, and an adequate choice of parts in PID control.
|
