Modeling and Optimization for Contribution Rates of Solar Heating and Cooling Systems in Building Energy-Saving
Abstract
With the increased emphasis on building energy-saving in China, solar heating and cooling (SHC) has become one of the best promised technologies to achieve ultra-low energy consumption. To achieve improved economy performance, enhancing energy system efficiency, SHC system requires scientific calculation and analysis according the architectural features. In this paper, building and system models have been established for hourly simulation of energy consumption. The deviation of tested and simulated solar fraction and system COP is about 5%. It indicates the system model established in this paper is accurate enough for design and optimization of SHC systems. With verified models, SHC system has been optimized considering the solar contribution and economy index. Results show that, after the system scheme and configuration optimization, SHC system applied in office building in Turpan can be achieved in the solar contribution of more than 30%. Meanwhile, the payback period could be reduced to less than 20 years.