Rashladni fluid HFO-1234yf - termodinamička analiza ciklusa toplotnih pumpi malih snaga

Abstract

U radu je izložena termodinamička analiza rashladnih ciklusa toplotnih pumpi malih snaga sa HFO-1234yf kao rashladnim fluidom. Zbog vrlo niske vrednosti GWP, HFO-1234yf ima izgleda da bude zamena za R134a. Date su osnovne termodinamičke, fizičko-hemijske i ekološke karakteristike HFO-1234yf. merodavne za primenu u rashladnoj tehnici. Za referentni levokretni ciklus sa unutrašnjim razmenjivačem toplote, izvršeno je poređenje termodinamičkih performansi i dati su pripadajući uporedni dijagrami za pet rashladnih fluida. Pokazano je da su ciklusi malih toplotnih pumpi sa HFO-1234yf energetski efikasni, tehnički izvodljivi i da. s obzirom na nizak GWP, mogu da budu prihvatljiva alternativa fluidu R134a za primenu u rashladnoj i klimatizacionoj tehnici.

A thermodynamical analysis of refrigeration cycles for small heat pumps with HFO-1234yf as a refrigerant has been given in this paper. As a result of very low GWP value, HFO-1234yf is intended to be a replacement for R134a. The basic thermodynamical, physico-chemical and ecological characteristics of HFO-1234yf relevant for RAC applications have been given. For a comparative cycle with internal suction gas heat exchanger the comparison of thermodynamical performances and associated diagrams for five refrigerants have been presented. It has been shown that the cycles of small heat pumps with HFO-1234yf are energy efficient and technical feasible. Having in mind his very low GWP the HFO-1234yf fluid may be acceptable alternative for R134a in RAC applications.