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Session 1426

Portable Experimental Apparatus for Demonstrating Thermodynamics Principles

Hosni I. Abu-Mulaweh Department of Engineering Indiana University-Purdue University at Fort Wayne Fort Wayne, IN 46805, USA

Abstract

A refrigeration system experimental apparatus was designed, developed and constructed for the undergraduate mechanical engineering laboratory at Indiana University-Purdue University at Fort Wayne. The purpose of the experimental apparatus is to demonstrate thermodynamics processes and systems which are fundamental to understanding the basic concepts of thermodynamics, such as the first and second laws of thermodynamics. In addition, this apparatus demonstrates a vapor compression refrigeration cycle. This paper will present a set of thermodynamics experiments in which the first and second law of thermodynamics are employed to determine the heat gained by the refrigerant in the evaporator, the heat rejected from the refrigerant in the condenser, and the isentropic efficiency of the compressor. The objective of these experiments is to assist the undergraduate mechanical engineering students in understanding the basic thermodynamics processes by utilizing real life applications. This project was completed with the assistance of an Undergraduate Senior Project Grant from the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE).

I. Introduction

Thermodynamics is a basic and very important topic that deals with energy and has long been an essential part of mechanical engineering curricula all over the world. The principles of thermodynamics are based on people’s everyday experiences and observations. However, the majority of students perceive thermodynamics as a difficult subject. Mechanical engineers use thermodynamics principles as part of an engineering science to study and design a wide variety of energy systems, such as jet engines and rockets, refrigeration systems, air conditioning systems, chemical processes, and power plants.

Because of these facts, it was decided that an experimental apparatus designed to demonstrate the thermodynamics processes and systems is needed. Such an apparatus would enhance and add another dimension to the teaching/learning process of the subject of thermodynamics. The students would be able to apply thermodynamics principles such as the first and second laws and

Proceedings of the 2002 American Society for Engineering Education Annual Conference & Exposition Copyright © 2002, American Society for Engineering Education

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Abu-Mulaweh, H. (2002, June), Portable Experimental Apparatus For Demonstrating Thermodynamics Principles Paper presented at 2002 Annual Conference, Montreal, Canada. 10.18260/1-2--11203