Abstract Due to the phase-out of CFCs and HCFC refrigerants, propane is a nature refrigerant occurring substance produced by natural gas production oil refining. As result, has higher latent heat lower density than conventional refrigerants while maintaining comparable saturation pressure thermal conductivity. So, already widely used in domestic fridges freezers for many years. However, propane...

Vocational Colege required a lot of practice. The practice Refrigeration System, one is charging refrigerant and vacuuming the refrigeration system. Because it was carried out by several groups, what happened that had been put into system wasted during process other groups. This causes an impact on environment health safety practitioner. type used practitioner HCFC-22 or R-22, which has begun t...