Performance Analysis And Economic Evaluation Of Different Terminal Cooling And Heating In Water-source Heat Pump System

Water-source heat pump is a kind of environmental protection and energy saving technologies,for countries to improve the energy structure,in recent years,the system has been widely used in China.The end of form about water source heat pump has fan coil,radiators,geothermal coil and so on.In this paper,we mainly in the Shenyang Children's hospital air conditioning system as an example to introduce water-source heat pump and fan coil units,water-source heat pump and capillary network experimental comparison between the two systems of research.Air conditioning system adopted in Shenyang Children's hospital is cold and heat source for the underground water source heat pump system,the terminal system for high-rise(four-eight)uses fan coil system,low-level(one-four)uses capillary network system;For this,I am aiming at Shenyang Children's hospital air conditioning system as a typical engineering cases,based on the related experimental data,the long running of the system are analyzed in the experiment,combining theory and practical application,the water source heat pump and capillary network systems and water source heat pump and fan coil system,in order to prove that the energy efficiency of the system.Firstly,from the concept of underground water source heat pump system and capillary network and composition,the system works and describes its characteristics,combined with relevant literature,investigated the hydrogeological conditions of this project are in line with the use of the underground water source heat pump system.Secondly,through a comprehensive comparison of experimental analysis water source heat pump system is run in conjunction with the capillary network and water source heat pump and fan coil joint operation.Heat pump units is the largest part of the whole system power consumption,heat pump units based on the measured power consumption of each month,so we know the end of the annual power consumption of a fan coil air conditioning systems for water source heat pump unit annual consumption of 74.8Wan kw.h,the end of capillary network of water source heat pump air conditioning system unit annual consumption of 60Wan kw.h,water source heat pump fan coil units than save 25%;According to the measured evaporator/condenser inlet and outlet temperature,air conditioning circulating water flow,water source heat pump units can know the end of the total power consumption of the fan coil heat pump cop was 6.24,the end of the capillary network of water source heat pump unit cop was 8.71,increase by 39%;Capillary network can know the energy efficiency of the heat pump unit is higher than the heat pump fan coil units,and are higher than other air-cooled heat source,such as a cooling tower.The whole system is not only the heat pump units,as well as fan coil,wheel heat recovery units,all kinds of pumps,etc.According to the measured experimental data shows that when the water source heat pump heating and fan coil system cop was 2.72,water source heat pump with a capillary network system cop was4.22,increased by 50%;When the cooling water source heat pump and fan coil system cop is 5.82,the water source heat pump with a capillary network cop to 7.78,a 36%increase;From this source heat pump and capillary network is higher than water source heat pump system efficiency and energy-efficient operation of the fan coil.In the summer refrigeration,capillary network easy to condensation,must take the air state point the treatment of fresh air state point and interior and exterior environmental combination are analyzed,by wet balance and total heat balance know children's hospital can adopt 13 ? dew point air,and the Airpak is used to simulate the air supply mode of PMV and PPD are in the range of human body comfort It was analysis of two system,through the theoretical calculation of the efficiency,know each system mainly loss of equipment,and suggests ways to reduce loss.Finaly,the two systems to calculate the project cost,annual operating costs and annual maintenance fees to the cost of the system is the goal in economic analysis and calculate the additional investment payback system.You can know the initial investment and the capillary network of water source heat pump water source heat pump and fan coil system than 17%,but 44%saving on annual operating costs can be estimated additional cost payback period of 6 years.The conclusion of this article as a reference value for the design,performance analysis and economic evaluation of groundwater source heat hump system with a capillary network,and also provides a reference for the application of the system.