Study Of Solar-hybrid Combined Cooling Heating And Power System Driven By Natural Gas

Since the "12th Five-Year Plan" and "13th Five-Year Plan" of energy development,with the essential demand of energy structure adjustment,fossil energy utilization reducument and clean energy promotion has become the current focus.Due to the clean energy is discontinuous and unreliable enough to meet the energy needs individually.The complementary utilization of fossil fuels and clean energy has gradually become a hot topic.Based on the National Natural Science Foundation of China,this paper proposes a solar-hybrid combined cooling heating and power system driven by natural gas in the background of energy complementary,provides some suggestions for the complementary research between fossil energy and clean energy.Firstly,based on the principle of "temperature counterparts and energy cascade utilization",a solar-hybrid combined cooling heating and power system driven by natural gas has been proposed.Under the purpose of flexible utilization of waste heat,the system flow in summer and winter are designed and simulated,respectively.Secondly,according to the first and second law of thermodynamics,the system performances under design conditions has been analyzed.The system performances under varaiable solar irralances and variable electric load ratio are explored subsequently.Furthermore,the thermodynamic complementarity of the solar energy and the natural gas under variable solar energy ratio and variable natural gas ratio is investigated.At last,the hybrid electric-thermal following method which considers the domestic hot water preferentially has been proposed and the possible thermoelectric matching scenario are analyzed.Based on the primary energy consumption,carbon dioxide emission,operation cost,exergy efficiency,surplus product and comfort reliability,the system performances under variable load electric-thermal ratio are explored.While a hotel building is taken as an example to compare the hybrid following strategy with the electric following and thermal following strategy.