Yazar "Solmus, Ismail" seçeneğine göre listele

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    A parametric study on a humidification-dehumidification (HDH) desalination unit powered by solar air and water heaters
    (Pergamon-Elsevier Science Ltd, 2014) Yildirim, Cihan; Solmus, Ismail
    The performance of a solar powered humidification-dehumidification desalination system is theoretically investigated for various operating and design parameters of the system under climatological conditions of Antalya, Turkey. The primary components of the system are a flat plate solar water heater, a flat plate double pass solar air heater, a humidifier, a dehumidifier and a storage tank. The mathematical model of the system is developed and governing conservation equations are numerically solved by using the Fourth order Runge-Kutta method. Daily and annual yields are calculated for different configurations of the system such as only water heating, only air heating and water-air heating. (C) 2014 Elsevier Ltd. All rights reserved.
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    Experimental investigation of a portable desalination unit configured by a thermoelectric cooler
    (Pergamon-Elsevier Science Ltd, 2014) Yildirim, Cihan; Soylu, Sezgi Kocak; Atmaca, Ibrahim; Solmus, Ismail
    Possible use of a novel portable desalination system was investigated experimentally. The system is based on humidification-dehumidification principle add thermoelectric cooling technique. A thermoelectric cooler was integrated into the system to enhance the process of both humidification and dehumidification. A prototype was fabricated and its performance was tested for various working conditions of the prototype to observe complex relation between psychrometric and thermoelectric phenomena. The effect of feed water mass flow rate and air flow velocity on the COP value of the thermoelectric cooler and clean water production of the system were examined. The maximum daily yield of the system and the COP value of the thermoelectric cooler unit were recorded as 143.6 g and 0.78, respectively. (c) 2014 Elsevier Ltd. All rights reserved.
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    THEORETICAL ANALYSIS OF THE PERFORMANCE OF AN ADSORPTION COOLING SYSTEM FOR VARIOUS WORKING PAIRS
    (Turkish Soc Thermal Sciences Technology, 2014) Solmus, Ismail; Yildrim, Ve Cihan
    In this study, the performance of an adsorption cooling system for various adsorbent-adsorbate working pairs has been theoretically investigated for different adsorption, desorption, evaporator and condenser temperatures. Equilibrium adsorption capacity of the working pair used in the system was evaluated by the Dubinin-Astakhov (D-A) equation. The amount of energy supplied to the system during regeneration period is evaluated by the heat of adsorption of the working pair. Generally, among the adsorbent-adsorbate working pairs investigated, silica gel-water working pair is the best in terms of the performance evaluation. Performance of the system is significantly getting better with increasing evaporator-desorption temperatures and with decreasing condenser-adsorption temperatures.
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    Transient behavior of a cylindrical adsorbent bed during the adsorption process
    (Elsevier Sci Ltd, 2015) Solmus, Ismail; Yamali, Cemil; Yildirim, Cihan; Bilen, Kadir
    A transient two dimensional local thermal non-equilibrium model is developed to investigate the influences of heat transfer and operating parameters on the dynamic behavior of a cylindrical adsorbent bed during the adsorption process. Local volume averaging method is used to drive the macro scale governing conservation equations from the micro scale ones. In the model, linear driving force model and Darcy's equation are considered to account for the resistances to internal and external mass transfer, respectively. Silica gel-water pair widely used in the adsorption cooling systems is chosen to be an adsorbent-adsorbate working pair. The parameters of interest are convective heat transfer coefficient, solid phase thermal conductivity, bed thickness, evaporator pressure, condenser pressure, driving heat source temperature and cooling source temperature. It is found that amount of refrigerant circulated through the system increases with increasing evaporator pressure-driving heat source temperature and decreasing condenser pressure-cooling source temperature. The duration of adsorption process is more sensitive to heat transfer resistances than to mass transfer resistances. The conductive and convective resistances need to be reduced to reach the equilibrium conditions in a short period of time and hence to have a better specific cooling power. (C) 2015 Elsevier Ltd. All rights reserved.