Absorption Refrigeration Systems. Electrochemical ARS

Recently, Newell (2000) proposed a new electrochemical ARS, as shown in Fig. 3.52, which consists of four main components. Electrochemical cell is a heat absorber, which corresponds to the evaporator in the ordinary vapor compression refrigeration machines. Fuel directs the heat in a manner similar to the condenser in the total vapor compression refrigeration cycle. The third component is a heat exchanger between the flow of gas and water flow. The fourth component is the current, the pump to increase fuel cell output voltage to a level sufficient for driving the electrochemical cell. Voltage required is low enough such that the cycle can be convenient, necessary for the production of solar photovoltaic battery or other DC electrical energy conversion systems. In fact, the system shown in Fig. 3.52 can be used as a thermally driven power cycle fuel cells at temperatures lower than in the electrochemical cell. Supply voltage becomes load powered by an electric circuit. Reduction component irreversibilities is essential to reach the break-even operating condition where the fuel cell produces enough energy for work in the electrochemical cell. Newell system of water-based/hydrogen-oxygen fuel cells and electrochemical cells combination. Other combinations are also considered. Each of them has its advantages and disadvantages. The configuration is for the system works near atmospheric pressure. Components can be operated at an almost uniform pressure from gravity, surface tension or the low head pumping, which are used for the transport of fluids within and between components. Water can be moved from the electrochemical cell and fuel elements, the external surface of heat exchange, or cells can be configured for direct heat exchange with the environment.

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