EXERGY ANALYSIS OF LOW TO MEDIUM TEMPERATURE ORGANIC RANKINE CYCLE

Abstract

In the present work HFO-1234yf is used as a Refrigerant &working fluid in refrigeration and air conditioning and Rankine cycle respectively. The first order simulation has been carried-out for the five ORC models, are such as Trilateral, Saturated, Superheated, Sub-critical, and Supercritical. he thermal efficiency of the five ORC model is compared by using various working fluid such as (HFO-1234yf,HFC- 134a,HFC-245fa,Ethanol,Isopentane) by varying expander inlet temperature(30- 200⁰C),at fixed condensation temperature(30⁰C) assuming fixed expander isentropic efficiency( =0.70) and fixed isentropic pump efficiency( =0.60). The thermal efficiency has been observed maximum for the 1234yf has very good potential for working fluid for ORC application for low to medium temperature. It has zero global warming potential (GWP), zero ozone layer depletion (ODP). The exergetic η and exergy destruction has also been carried out for these Organic Rankine cycle.