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Publication - Dr Hind Saidani-Scott

    Calorimetric measurements of the dynamics of a finned adsorbent; early assessment of the activated 3 carbon cloth - ethanol pair with prismatic aluminium fins

    Citation

    Tierney, M, Ketteringham, L, Selwyn, B & Saidani-Scott, H, 2016, ‘Calorimetric measurements of the dynamics of a finned adsorbent; early assessment of the activated 3 carbon cloth - ethanol pair with prismatic aluminium fins’. Applied Thermal Engineering, vol 93., pp. 1264-1272

    Abstract

    The heat of adsorption of the pair ethanol
    -
    activated carbon cloth (ACC) has been measured in a specialised calorimeter, following a step change in vapour pressure (the "large pressure jump", LPJ
    ) or a step change in temperature of the fin base
    (the “large temperature jump”, LTJ). This is the first time that LTJ has been attempted with this particular technique. The ACC was incorporated into a set of fins, representing small sections of finned tube adsorbent bed (~50 gram mass)
    and
    with a fin-to-fin gap of 6 mm. The heat rejection fitted an exponential decay, and for purposes of data fitting was adequately described by exponential
    decay, notwithstanding
    multiple physical effects within the ACC pack. Characteristic times, τ,
    were established for LPJ and LTJ. The characteristic times
    were adjusted to allow for sensible heat of the sample,
    making them indicative of change in
    refrigerant
    uptake and cooling power.
    For instance,
    for the LTJ
    338 K →
    303 K the
    characteristic time was 146s
    without adjustment, but 183s
    with adjustment. For the fins tested under LTJ, an “average” specific cooling power, defined with cycle time = 1.6 τ, was in the
    range
    of 0.36 to 0.52 kW kg-1, somewhat smaller than seen elsewhere and requiring
    future
    optimization of the finned sample
    .

    Full details in the University publications repository