Energy Consumption Analysis And Energy Saving Optimization Of Capillary Radiant Air-Conditioning System With Different Combinations Of Cold And Heat Sources

The capillary radiation air conditioning system is an independent temperature and humidity control system.The temperature and humidity of the system are independently controlled by different systems.Compared with the traditional air conditioning system,it can save a lot of energy consumption and create a better indoor environment.These advantages make Capillary radiation air-conditioning systems have great development prospects.There are many ways to combine the capillary radiant air conditioner terminal with the cold and heat source and the fresh air system.Therefore,this article uses EnergyPlus to simulate the annual dynamic energy consumption of the capillary radiant air conditioning system with different cold and heat sources and different fresh air systems.Energy-saving optimization for relatively energy-saving systems.This paper takes a residential building as the research object,uses SketchUp and Openstudio to establish a building model,and compares and analyzes the use of different air conditioning systems when the building model is used in hot summer and cold winter areas(take Nanjing as an example)and cold areas(take Beijing as an example)Energy consumption.The three air conditioning system schemes adopted are: 1)Single cold source system: standard ground source heat pump + heat exchanger + capillary radiation terminal + water-cooled fresh air blower;2)Dual cold source system: high temperature ground source heat pump + capillary radiation terminal +standard Ground source heat pump + water-cooled fresh air blower;3)Direct expansion type fresh air blower system: high temperature ground source heat pump + capillary radiant end + direct expansion type fresh air blower.The simulation shows that for the areas with hot summer and cold winter,the dual cold source system saves 17.38% energy than the single cold source system,and can save 10.79 kWh per square meter of building a year.The direct expansion fresh air blower system is better than the single cold source system and the dual cold source system.The energy saving is18.29% and 1.09% respectively,and each square meter of building can save 11.35 kWh and 0.56 kWh each year.For cold areas,the dual cold source system saves 12.81% energy than the single cold source system,and each square meter of building can save 8.27 kWh per year.The direct expansion fresh air fan system saves 15.81% and 3.43% energy respectively than the single cold source system and the dual cold source system.,Each square meter of building can save 10.21 kWh and 1.93 kWh each year.In addition,when the three systems are used in cold areas,the annual energy consumption of buildings is higher than that in hot summer and cold winter areas.According to the simulation results,the direct-expansion fresh air fan system in the hot summer and cold winter area was optimized for energy saving of the air conditioning system,and the influence of different water supply temperatures of the radiant panels and different fresh air supply temperatures on the system energy consumption was simulated.It is concluded that when other conditions are the same,appropriately increasing the temperature of the cold water supply of the radiant panel can reduce the annual energy consumption of the system,but it is not advisable to increase the water temperature excessively,otherwise it will easily cause the indoor temperature to be too high and affect the thermal comfort of the human body;within a reasonable range,appropriate Lowering the temperature of the hot water supply of the radiant panel in winter can reduce the annual energy consumption of the system;when the temperature of the fresh air supply in winter increases,the annual energy consumption of the system is reduced.