This paper presents an experimental study of the effectiveness of using a combined solar energy and heat rejected from a split-type air conditioner, for drying biomaterials. The experiments were carried out on biomaterial dryer using the combined solar energy and heat rejected from a split-type air conditioner. The effectiveness was evaluated based on the comparison of various drying methods, in terms of drying kinetics of the biomaterial being dried, under Thailand’s climate conditions. The banana was chosen as testing materials. The banana was dried by the dryer with using three drying methods: Heat rejected from an air conditioner; solar energy; and the combined solar energy and heat rejected from an air conditioner. The result shows that the combined solar energy and heat rejected for drying biomaterials were found to have a shorter drying time, higher energy efficiency, and more natural appearance of dried biomaterial compared to the conventional drying method.
-Roasted pork is a favorite dish in many different cultures, and countries. At present, the roasting process is highly polluting, emitting high carbon dioxide loads to atmosphere, particulate pollution that can pollute the surrounding environment. An electric roaster is just as suitable for roasting the pork with low pollution and high efficiency but it has slow cooking capacities. So, the objectives of this research are to design and fabricate a continuous pork roaster using infrared heating for community enterprises, with its capacity and efficiency should be in an acceptable range. The designed roaster is used for production of roasted pork. The experiments are carried out on a continuous pork roaster using infrared heating. Three kilograms of pork meat are applied with the 3 infrared heaters with the power of 1000W each that give a maximum of 3000W. Capacity test results show that the production capacity of the roaster is approximately 400 pieces /hr continually. And the surface of roasted pork obtained from this roaster meet the community product standard. Therefore, if small and micro community enterprises are persuaded to use the developed roaster, it can reduce pollution from roasting process and help keep our air and environmental clean. This technology also helps to reduce cost and production time, and improve productivity, and eventually lead to be able to survive in competitive environments.
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