LAB 1_ Fnal Write-up - Analysis of an Air Conditioning System

LAB 1_ Fnal Write-up - Analysis of an Air Conditioning System

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Analysis of an Air Conditioning System A report on an experiment performed for ME 115 Thermal Engineering Laboratory San Jose State University Department of Mechanical and Aerospace Engineering By
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Table of Contents Abstract ---------------------------------------------------------------------------------3 Introduction ---------------------------------------------------------------------------------4 Theory ---------------------------------------------------------------------------------5 Experimental Setup and Procedure ------------------------------------------------------6 Experimental Results and Calculations ---------------------------------------------7 Discussion of Results ------------------------------------------------------------------------11 Conclusion and Recommendations ------------------------------------------------------12 References ---------------------------------------------------------------------------------13 Appendices Appendix A: Raw Data ----------------------------------------------------------------------14 Appendix B: Properties of Refrigerant 12 ------------------------------------------------15 Appendix C: Psychrometric Chart----------------------------------------------------------18 2
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Abstract An air conditioning process which consists of maintaining a living space or facilities at a desired temperature and humidity was analyzed using a Hilton Air Conditioning Laboratory unit which uses refrigerant R-12. This experiment demonstrates the heat and energy transfers of all sections on an air conditioning process, which consists of untreated air entering the ducting and going through a humidifying and preheating section, a cooling/dehumidifying section and finally a reheating section. Measurements of temperatures and relative humidity were taken at each section of the process. The experimental results indicate that air can be conditioned to desired levels and due to experimental uncertainty heat transfer values obtained from experimental calculations differed from theoretical values as expected . 3
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Introduction In thermodynamics it is known that the human body is most comfortable when it is releasing just the right amount of heat depending on the environmental conditions and metabolism. The dry- bulb (DB) temperature and relative humidity (RH) is enough to describe the environment. For example a person exercising in the summer needs cooling and dehumidifying, where as a person sleeping in the winter needs heating and humidifying. All modern homes have an Air conditioning system to provide cooling and dehumidifying. This lab’s purpose is to identify and verify the operations of each component of a real AC system as well as further understand the effects of experimental uncertainty. The Hilton Air Conditioning (AC) system in the SJSU room E 113 was investigated and found to
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This note was uploaded on 09/08/2010 for the course ME 115 at San Jose State University .

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LAB 1_ Fnal Write-up - Analysis of an Air Conditioning System

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