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Optimized solar water heater for Scottish weather conditions.

Junaidi, Haroon (2007) Optimized solar water heater for Scottish weather conditions. PhD thesis, Edinburgh Napier University.

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    Abstract/Description

    The ICSSWH (Integrated Collector Storage Solar Water Heater), apart from being the
    oldest is also the most economical means of solar water heating. The effect of
    modifications in the collector geometry has frequently appeared in the literature, and
    over the time, has resulted in different designs. These designs differ mainly on the site
    of installation as well as the target application. A novel design created by Professor T
    Muneer at Napier University, utilizes fins inside the storage tank to improve the heat
    transfer. The reported field tests of the fin type ICSSWH have indicated a 10 %
    improvement in the solar fraction compared to unfinned.
    As ICSSWH is the lowest cost, it presented a possible solution for the Scottish market
    where Energy Saving Trust estimates that 50% of hot water demand of a household
    can be met through solar water heating.
    In the present research program, two prototype collectors (one with- and one without
    fins) were fabricated at Napier University by the author. The collectors were then
    tested in the laboratory on identical experimental schemes to determine their
    respective performance. Simulations based on analytical modelling were then
    undertaken, using numerous experimental data for validation that were obtained
    during the course of the present work. A high degree of conformance was noted
    between the two. Furthermore, for a deeper insight, Computational Fluid Dynamics
    (CFD) analysis was performed.
    This research focuses on the qualitative and quantitative assessment of the heat
    transfer due to the fins. The difference in the performance with respect to the change
    in tilt angle was also studied. This study can therefore be utilised for developing solar
    water heating systems for any given location. Note that there is an intrinsic link
    between the latitude and inclination angle of the collector plate. The nocturnal loss from the collector is the principal factor that has inhibited the wide
    spread use of the ICSSWH. The remedies to abate this problem have therefore been
    attempted. In addition to that, the collectors have to be integrated with the domestic
    hot water supply system and plumbing considerations have to be incorporated within
    the overall design. The supply circuits were worked out and the measures for freeze
    and boil protection were devised.
    The optimization of any system is an intrinsic task particularly when several variables
    are involved. On the basis of the obtained results from simulations and experiments,
    the influential design variables were identified. The values for these variables which
    lead to the optimal design in terms of thermal performance were assessed while
    keeping the overall manufacturing cost of the collector as low as possible.
    Recommendations for future work have also been presented.

    Item Type: Thesis (PhD)
    Uncontrolled Keywords: Integrated Collector Storage Solar Water Heater; fins; Computational Fluid Dynamics; heat transfer;
    University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
    Dewey Decimal Subjects: 600 Technology > 690 Building & construction > 696 Utilities
    Library of Congress Subjects: T Technology > TD Environmental technology. Sanitary engineering
    Item ID: 3799
    Depositing User: Mrs Lyn Gibson
    Date Deposited: 08 Jul 2010 14:17
    Last Modified: 12 Jan 2011 04:55
    URI: http://researchrepository.napier.ac.uk/id/eprint/3799

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