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Test of solar adsorption air-conditioning powered by evacuated tube collectors under the climatic conditions of Iraq

Lattieff, Farkad A., Atiya, Mohammed A., Al-Hemiri, Adel A.
Renewable energy 2019 v.142 pp. 20-29
adsorption, air conditioning, climatic factors, collectors, cooling systems, heat exchangers, heat transfer, manufacturing, refrigeration, renewable energy sources, solar collectors, temperature, water flow, Iraq
An adsorption chiller for an air-conditioning application integrated with domestic solar collector was tested under the climatic conditions of Baghdad, Iraq. An intermittent adsorption chiller, which consists of a single bed, condenser, and evaporator, was designed to evaluate its performance. To obtain the requested hot water temperature of 90 ± 2 °C to run this chiller, two solar evacuated tube collectors (4 m2) were installed. Hot water flow rates of 10, 20, 30, and 40 l/min were controlled to study the influence of heat source fluctuations on the chiller characteristics such as adsorption capacity, heat exchanger efficiency, SCP, and COP. The results showed that the optimal SCP, COP and the evaporator temperature were 39 w/kg, 0.55, and 6.6 °C, respectively when the hot water flow rate was 30 l/min. However, the larger flow rate (40 l/min) resulted in low COP due to the higher consumption of the heat transfer. The combination of these experiments’ results can contribute to reducing the high manufacturing cost of solar cooling system which is one of the main obstacles associated with the spreading of solar refrigeration devices. In this respect, solar cooling systems can become more competitive to the conventional air conditioning devices.