Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
THERMODYNAMIC ANALYSIS OF A RESIDENTIAL AIR CONDITIONING EQUIPMENT OPERATING WITH ODP FREE AND LOW GWP REFRIGERANTS
Submission Author:
Victor Bernardoni Cavalcanti Baptista , RJ
Co-Authors:
Victor Bernardoni Cavalcanti Baptista, Gabriel Lisbôa Verissimo
Presenter: Victor Bernardoni Cavalcanti Baptista
doi://10.26678/ABCM.COBEM2021.COB2021-0240
Abstract
Throughout the evolution of air conditioning, the fluids commonly used have also undergone through changes. Firstly, the concern was to choose a refrigerant that allows the proper operation of the equipment. In the last forty years, the focus became environmental problems caused by the refrigerants when released to the atmosphere. The search for an ecofriendly refrigerant that can result in air conditioning applications with satisfactory thermodynamic efficient is an actual and developing field. The present work performs a thermodynamic analysis of a residential air conditioning equipment with alternative refrigerants with ODP free and low GWP (less than 3). Computational modeling was developed in Python, focused on the thermodynamic analysis of the condenser and evaporator of the selected equipment, allowing a comparison between some promising fluids. The methodology developed allows to select the best fluid to be used either in retrofitting the old equipment to the new refrigerant or developing a completely new refrigeration system. The performance and frigorific capacity of the system working with ammonia (R717), isobutene (R600a), propane (R290), R1234yf, R1234ze(E), R22 and R134a for different operation conditions are studied. The results indicates that ammonia presents the best performance among the selected refrigerants for the conditions assumed here, although not recommended for residential applications. However, R290 and R1234yf showed to be thermodynamically suitable refrigerants to domestic air conditioning equipment.
Keywords
air conditioning, Thermodynamics, ODP, GWP, development, Environment
