The Operation Characteristic Of A Three-Condition Chiller Unit

In the past several decades,the cooling-storage technique and heat pump technique have all developed rapidly.But all of them have certain limits.The cooling-storage technique can only be applied in summer,which can supply the lack of electric power.But it can't supply hot water for heating in the winter.In the same,heat pump can supply cooling for summer and heating for winter,but it can't storage cooling in the night when the electric power is very adequate.So three-condition chiller which combines cooling-storage technique and heat pump technique has a great develop space in the future and a good and economic market.In order to study the operation characteristics of three-condition chiller,build up the models of the condensor and evaporator by using subarea concenrated parameters method.The compressor model is established by using systemic analysis method and Datafit software. The thermodynamics expansion value model is built up in force balance method. The dynamic system model is the efficient connection of all component models by laws of equalization of mass, momentum and energy. These models can provide powerful tools for studying operation performance of three-condition chiller.Using the system mathematics model,here imitate the chiller's operating in the three conditions and analyse the operating parameters of the system, cooling,heating,power,COP,discharge temperature and so on.Compare the simulation parameters of the sample chiller with the parameters of the existing chiller.The results is they are all most same.It proves the possibility,credibility and accuracy of the model.Analysing the operation characteristic of the three-condition chiller under three conditions,it supplies the insruction and theories foundation for applying the three-conditon chiller in the future.