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    A Review of Polymer Materials for Solar Water Heating Systems

    Source: Journal of Solar Energy Engineering:;2000:;volume( 122 ):;issue: 002::page 92
    Author:
    Raghu Raman
    ,
    Gary Jorgensen
    ,
    Susan Mantell
    ,
    Jane Davidson
    ,
    Chunhui Wu
    DOI: 10.1115/1.1288214
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This paper summarizes current research aimed at using polymer materials for glazing and heat exchanger components in solar water heating systems. Functional requirements, relevant polymer properties and an approach for selecting polymers are described for each of these components. Glazing must have high transmittance across the solar spectrum and withstand long term exposure to ultraviolet (UV) light. Candidate glazing materials were tested outdoors for one year in Golden, Phoenix and Miami, as well as exposed for over 300 days in an accelerated testing facility at a concentration ratio of two at the National Renewable Energy Laboratory. Measurements of hemispherical transmittance indicate that a 3.35 mm polycarbonate sheet with a thin film acrylic UV screen provides good transmittance without excessive degradation. The primary challenge to designing a polymer heat exchanger is selecting a polymer that is compatible with potable water and capable of withstanding the high pressure and temperature requirements of domestic hot water systems. Polymers certified for hot water applications by the National Sanitation Foundation or currently used in heat exchangers and exhibit good high temperature characteristics were compared on the basis of a merit value (thermal conductance per unit area per dollar) and manufacturer’s recommendations. High temperature nylon (HTN), polypropylene (PP) and cross linked polypropylene (PEX) are recommended for tube components. For structural components (i.e. headers), glass reinforced high temperature nylon (HTN), polyphthalamide (PPA), polyphenylene sulphide (PPS) and polypropylene (PP) are recommended. [S0199-6231(00)00902-3]
    keyword(s): Hot water , Heat exchangers , Polymers , Solar energy , Temperature , Ultraviolet radiation , Water AND High temperature ,
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      A Review of Polymer Materials for Solar Water Heating Systems

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    http://yetl.yabesh.ir/yetl1/handle/yetl/124282
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    contributor authorRaghu Raman
    contributor authorGary Jorgensen
    contributor authorSusan Mantell
    contributor authorJane Davidson
    contributor authorChunhui Wu
    date accessioned2017-05-09T00:03:21Z
    date available2017-05-09T00:03:21Z
    date copyrightMay, 2000
    date issued2000
    identifier issn0199-6231
    identifier otherJSEEDO-28290#92_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/124282
    description abstractThis paper summarizes current research aimed at using polymer materials for glazing and heat exchanger components in solar water heating systems. Functional requirements, relevant polymer properties and an approach for selecting polymers are described for each of these components. Glazing must have high transmittance across the solar spectrum and withstand long term exposure to ultraviolet (UV) light. Candidate glazing materials were tested outdoors for one year in Golden, Phoenix and Miami, as well as exposed for over 300 days in an accelerated testing facility at a concentration ratio of two at the National Renewable Energy Laboratory. Measurements of hemispherical transmittance indicate that a 3.35 mm polycarbonate sheet with a thin film acrylic UV screen provides good transmittance without excessive degradation. The primary challenge to designing a polymer heat exchanger is selecting a polymer that is compatible with potable water and capable of withstanding the high pressure and temperature requirements of domestic hot water systems. Polymers certified for hot water applications by the National Sanitation Foundation or currently used in heat exchangers and exhibit good high temperature characteristics were compared on the basis of a merit value (thermal conductance per unit area per dollar) and manufacturer’s recommendations. High temperature nylon (HTN), polypropylene (PP) and cross linked polypropylene (PEX) are recommended for tube components. For structural components (i.e. headers), glass reinforced high temperature nylon (HTN), polyphthalamide (PPA), polyphenylene sulphide (PPS) and polypropylene (PP) are recommended. [S0199-6231(00)00902-3]
    publisherThe American Society of Mechanical Engineers (ASME)
    titleA Review of Polymer Materials for Solar Water Heating Systems
    typeJournal Paper
    journal volume122
    journal issue2
    journal titleJournal of Solar Energy Engineering
    identifier doi10.1115/1.1288214
    journal fristpage92
    journal lastpage100
    identifier eissn1528-8986
    keywordsHot water
    keywordsHeat exchangers
    keywordsPolymers
    keywordsSolar energy
    keywordsTemperature
    keywordsUltraviolet radiation
    keywordsWater AND High temperature
    treeJournal of Solar Energy Engineering:;2000:;volume( 122 ):;issue: 002
    contenttypeFulltext
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