The energy requirements must be accurately predicted for a solar heating and cooling system applied in this nZEB building.
Abbreviations COP: Coefficient of thermal performance for the absorption chiller CPC: Compound parabolic solar collector EMS: Energy management system ETC: Evacuated tube solar collector FPC: Flat plate solar collector HVAC: Heat ventilation and air conditioning nZEB: Nearly zero-energy building NZEB: Net zero-energy building PTC: Parabolic trough solar collector SHCS: Solar heating and cooling system TES: Thermal energy storage.
Wang, Report for Solar Heating and Cooling System in Qingdao, 2008.
A solar heating and cooling system
including a 35.17 kW cooling absorption chiller, an evacuated tube solar collector, two hot-water storage tanks, two cold-water storage tanks, and a 281 kW cooling tower has been designed and built by the researchers.
For the given application in a solar heating and cooling system
, heat storage should take place in a very narrow temperature range of approximately 30[degrees]C (86[degrees]F) in order to fulfill both tasks: support of the heat rejection of the chiller at about 35[degrees]C (95[degrees]F) and contribution to the heating of the building at temperatures above 22[degrees]C (71.6[degrees]F).
Large scale solar heating and cooling systems
In this paper, system characteristics, benefits and obstacles from combined solar heating and cooling systems
to achieve both high solar fractions and better financial performance are discussed.