Thermodynamic Analysis Of Solar Energy And Fuel Cell Coupled Heat Pump System

Facing the problem of energy shortage and environmental pollution,the development of distributed energy system is a crucial direction to achieve energy conservation and emission reduction in the future.Based on the concept of energy cascade utilization,designs a solar energy and fuel cell coupled cooling(heating)and electricity cogeneration system,The refrigeration(heating)of the system is carried out by the coupled heat source driving the absorption heat pump,and analyzed the energy complementation and high-efficiency utilization mechanism,and analyzed the performance of the coupled system from the perspective of thermodynamics.A swirl generator was designed to improve the energy efficiency,and used Fluent to simulate the pressure and velocity field.The results show that there is a pressure drop inside the generator,which reduces the saturation temperature of the Li Br solution;The liquid film on the inner wall of the cyclone,which ensure that water vapor can escape from the solution in the separation section;Compared with traditional generators,reduces the temperature of the heat source and improve the utilization of waste heat.The thermodynamic calculation of the absorption heat pump driven by coupled heat source shows that when the solution inlet temperature reached 86 ℃,the refrigeration coefficient reached 0.763,which is about 8.9% higher than traditional absorption heat pump.When the fuel cell was used as the only power source,the heat pump performance and exergic efficiency decreased with the increase work load of fuel cell.When meeting the power of 30.36 k W and the refrigeration demand of 11.48 k W,the performance is0.926,and the exergy efficiency is 0.558.When solar energy is used as auxiliary heat source,as the solar energy input increases,performance decreases and the exergy efficiency increases.When supplementing 6.21 k W,the cooling capacity reaches 15.6k W,the performance drops to 0.802,and the exergy efficiency increases to 0.576.The solar energy and fuel cell coupling driven heat pump can be used as home energy supply mode,realizing combined cooling,heating and power for household users,and providing reference for the application of renewable energy in the building field.Figure 39;Table 14;Reference 74...