Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
EXPERIMENTAL INVESTIGATION ON VARIABLE SPEED COMPRESSOR WITH AND ELECTRONIC EXPANSION VALVE IN A REFRIGERATION SYSTEM
Submission Author:
TAYNARA LAGO , PB
Co-Authors:
Luiz Felipe Mendes Moura, Kamal Ismail, Claudia Rosa do Espirito Santo Nobrega
Presenter: TAYNARA LAGO
doi://10.26678/ABCM.ENCIT2016.CIT2016-0230
Abstract
This work reports the results of an experimental study realized on a vapor compression refrigeration system with an electronic expansion valve and variable speed compressor with the objective of energy saving and improving system performance. The experimental rig is composed of two systems. The main system is composed of a forced air condenser unit, evaporator, hermetic compressor and expansion elements (thermostatic expansion valve and the electronic expansion valve), while the secondary system has a pump for circulating the secondary fluid (alcohol), and air conditioning heat exchanger. Initially analysis and planning of the experimental data was realized by using the manufacturer's data to identify the optimum points of operation. Based on these findings, the influence of the compressor speed and the opening of the expansion device on the performance of the refrigeration system were investigated. Additionally, comparative analysis of the performance of the two expansion devices was realized. The results showed that for each compressor speed there is an opening of the electronic expansion valve (EEV) which gives maximum coefficient of performance, COP, and stable degree of superheat lower than that obtained with thermostatic expansion valve (TEVs). This allows better use of the evaporator surface area and enhancement of the total efficiency of the system.
Keywords
Refrigeration system, Variable Speed Compressor, Electronic Expansion Valve, COP
