Study on heat transfer coefficient of plastic plate heat exchanger for liquid desiccant air-conditioning application

Operating air conditioning equipment with low cost and high efficiency is a great challenge in the HVAC industry. Air conditioning accounts for approximately 50% of the power consumption of most buildings. Singapore being a highly urbanized city, air conditioning is widely used throughout the entire...

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Main Author: Oh, Chia Wee
Other Authors: School of Mechanical and Aerospace Engineering
Format: Final Year Project
Language:English
Published: 2014
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Online Access:http://hdl.handle.net/10356/60945
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-609452023-03-04T18:25:53Z Study on heat transfer coefficient of plastic plate heat exchanger for liquid desiccant air-conditioning application Oh, Chia Wee School of Mechanical and Aerospace Engineering Anutosh Chakraborty DRNTU::Engineering::Mechanical engineering::Alternative, renewable energy sources Operating air conditioning equipment with low cost and high efficiency is a great challenge in the HVAC industry. Air conditioning accounts for approximately 50% of the power consumption of most buildings. Singapore being a highly urbanized city, air conditioning is widely used throughout the entire island. Together with the hot and humid climate, air conditioning has become a norm. A typical air conditioner usually performs additional cooling to meet the air humidity requirements for thermal comfort. This type of air conditioning is less efficient because they require more energy to remove water vapour from the moisture-rich air. As such, one of the major loads of the air conditioning is to perform dehumidification on the outdoor air. Any opportunity to reduce the energy usage should be looked into. A promising alternative is the use of an open absorption system such as a liquid desiccant air-conditioning system (LDAC).This system performs dehumidification by absorbing the moisture content of surrounding air using liquid desiccant. Using this technology, energy consumption for cooling can be reduced by up to 50% as the air becomes drier. By implementing this system, the amount of electricity consumed can be reduced significantly, thereby also resulting in lower greenhouse gases emissions. In this study, the process of LDAC is being investigated using a plastic heat exchanger. A thin polypropylene membrane is also used to model the process. Instead of using the liquid desiccant as the medium fluid, distilled water is used. Experimental runs were performed with varying temperatures, water flow rates etc. The results of the experiments show promising heat transfer and dehumidification or present some findings that would provide groundwork for the next phase of the LDAC research. Bachelor of Engineering (Mechanical Engineering) 2014-06-03T06:53:45Z 2014-06-03T06:53:45Z 2014 2014 Final Year Project (FYP) http://hdl.handle.net/10356/60945 en Nanyang Technological University 68 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering::Alternative, renewable energy sources
spellingShingle DRNTU::Engineering::Mechanical engineering::Alternative, renewable energy sources
Oh, Chia Wee
Study on heat transfer coefficient of plastic plate heat exchanger for liquid desiccant air-conditioning application
description Operating air conditioning equipment with low cost and high efficiency is a great challenge in the HVAC industry. Air conditioning accounts for approximately 50% of the power consumption of most buildings. Singapore being a highly urbanized city, air conditioning is widely used throughout the entire island. Together with the hot and humid climate, air conditioning has become a norm. A typical air conditioner usually performs additional cooling to meet the air humidity requirements for thermal comfort. This type of air conditioning is less efficient because they require more energy to remove water vapour from the moisture-rich air. As such, one of the major loads of the air conditioning is to perform dehumidification on the outdoor air. Any opportunity to reduce the energy usage should be looked into. A promising alternative is the use of an open absorption system such as a liquid desiccant air-conditioning system (LDAC).This system performs dehumidification by absorbing the moisture content of surrounding air using liquid desiccant. Using this technology, energy consumption for cooling can be reduced by up to 50% as the air becomes drier. By implementing this system, the amount of electricity consumed can be reduced significantly, thereby also resulting in lower greenhouse gases emissions. In this study, the process of LDAC is being investigated using a plastic heat exchanger. A thin polypropylene membrane is also used to model the process. Instead of using the liquid desiccant as the medium fluid, distilled water is used. Experimental runs were performed with varying temperatures, water flow rates etc. The results of the experiments show promising heat transfer and dehumidification or present some findings that would provide groundwork for the next phase of the LDAC research.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Oh, Chia Wee
format Final Year Project
author Oh, Chia Wee
author_sort Oh, Chia Wee
title Study on heat transfer coefficient of plastic plate heat exchanger for liquid desiccant air-conditioning application
title_short Study on heat transfer coefficient of plastic plate heat exchanger for liquid desiccant air-conditioning application
title_full Study on heat transfer coefficient of plastic plate heat exchanger for liquid desiccant air-conditioning application
title_fullStr Study on heat transfer coefficient of plastic plate heat exchanger for liquid desiccant air-conditioning application
title_full_unstemmed Study on heat transfer coefficient of plastic plate heat exchanger for liquid desiccant air-conditioning application
title_sort study on heat transfer coefficient of plastic plate heat exchanger for liquid desiccant air-conditioning application
publishDate 2014
url http://hdl.handle.net/10356/60945
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