e-Journal Langganan

RANCANG BANGUN DAN PENGUJIAN MESIN PENDINGIN DENGAN MENGGUNAKAN ETANOL 96% SEBAGAI REFRIGERAN

HELBERT

Abstrak

The usage of cooling machine is to condition and cool the room(air conditioning). Cooling machine like refrigerator is commanly use to refrigerate food and drink or to preserve it. Refrigerator that require no electricity power to operate is a refrigerator that can cool down a room temperature by evaporate etanol as a refrigerant. Etanol work as a heat absorber, absorb heat from room to cool down the room temperature. To fasten the reaction we used a pump, Oscilating pump. Total cooling load comes from room inside and infiltration that occurs. The main purpose of this project is to estimate the total cooling load such as conduction, convection, and radiation. The lowest temperature this machine achieve, the advantages of using Styrofoam material dan how its work. The design specification is base on books, journal, paper, internet and observation. Then we draw the design in 3D by using AutoCAD 2011, ready the tools to built, then we built the cooling machine. To examine the machine, we any measurement such as agilent and HOBO. From the measurement tools we obtain indoor and outdoor temperature, sun rays intensity, dew point and relative humidity. Then we observate the result are shown in graph. The conclusion is, Styrofoam is suitable to use as case in this machine because of its high stiffness and low thermal conduction, total cooling load is 6,75297 W, the lowest temperature is 16-17 from room temperature 32-33 in 1,5-2 hours operation. Used up to 300ml etanol 96% on each operate.

Kata kunci : Cooling machine, Ethanol, Cooling loads

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