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Abstrak :
ABSTRAK
Utilization of palm oil wastes such as palm oil rods to become new materials could be an alternative to making composite materials using oil palm stem powder boosters. The palm oil rod is processed to be powdered and mixed with polyester resin for subsequent polymer composites. Then the material is used as material for the manufacture of motorcycle exhaust. The purpose of this study was to find out a good mixed formulation in the manufacture of motorcycle exhaust with polymer composite material reinforced by palm stem powder, knowing the process of making with polymer composite material reinforced powder of palm stem, and making exhaust polymer composite reinforced coconut powder palm oil. Motorcycle exhaust is made using press printing method. From the research results obtained a good composition in making motorcycle exhaust is 90% resin and 10% oil palm stem powder. During the hardening process the resin mixture and oil palm stem powder occur in temperature rise due to the resin and catalyst reaction up to 151 ° C and it takes 3 minutes for the composite mixture to fully harden. By using this waste of palm oil stem got composite exhaust product that is lighter 1,2 Kg compared with exhaust manufacer (conventional).

Abstrak :
In this cooling process will be conducted research on drinking water, how long it will be cooled by the refrigerator, which is placed beside the bottom of the tube drinking water, to achieve a relatively low temperature and the amount of heat absorbed by the refrigerator of drinking water. All parts of the outer tube so that the hot water is isolated from the outside only a few enter into the drinking water, which amount will be calculated during the cooling process. In this cooling process, when the water has reached the specified conditions, the cooling machine will stop automatically. In this cooling process, the research methods that will be used is an experimental method, wherein the temperature of the water is the independent variable that will be determined later. And from these tests can be concluded that in the cooling process for 35 minutes obtained by the heat released from the drinking water is (105.84 kJ) and the added value gained heat into water (0,313 Watt) or (0.0869) Kj/h.