This research discusses about designing of counter-flow type gasification stove utilizing biomass municipal solid waste (MSW). The first step of the research process is to formulate the design concept of the gasification stove using the MSW collected in Padang city. The results of the design concept formulation are used to obtain the detail design parameters which is used as the reference for manufacturing the stove. The main designing parameters of the gasification stove are the diameter and the height of the stove. The technical drawing is made according to the designing parameters obtained from the design concept formulation. Base on the technical drawing, the counter-flow type biomass gasification stove was built. The obtained results show that for a large value of updraft air and a small value of downdraft air, the operating time of the stove is long. This condition is obtained in the case of standard air and fuel ratio (AFR<1.5). This results show that the gasification stove efficiency is better in comparison with the conventional one.
Currently, solid desiccant air conditioning system (SDACS) is an alternative to utilize solar energy to resolve environmental and energy issues resulting from the use of conventional vapor compression of air conditioning systems. SDACS can maintain the thermal comfort of a room with optimization of solar thermal energy and minimal use of electrical power. Present work in this paper is to design a solid desiccant air conditioning system of a closed room with 18 m3 of total volume. The desiccant wheel is used to dehumidify air in the room, and evaporative cooling will be decreasing the temperature of the air. The result shows the lower temperature can be reached 24°C.
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