Modeling and Control of Temperature in Enthalpy Difference Laboratory

Abstract

The enthalpy difference laboratory is designed to test the air conditioner performance, which can simulate the environmental conditions. The enthalpy difference method is used to investigate the refrigeration ability and heating capacity of air conditioner. The temperature of the laboratory is controlled by three heaters, five chillers and motors. Due to the influence of equipment power and room size, the temperature control has the characteristics of nonlinearity and strong hysteresis. In this paper, the modeling method is used to get a better temperature curve. We got four temperature models, and choose two suitable control models through comparison. Finally, the laboratory model is determined by experimental data and the apropriate methods is adopted to control the temperature. The simulation is carried out to verifies the effectiveness of the proposed methods.