Replacing R-22 by HFC refrigerants in stationary air conditioners is forcing oil producers to develop a new lubricant which has good miscibility with HFC, lubricity and electric resistivity. Mitsui has selected a carbonate compound for a new lubricant candidate with HFC and developed it forcusing on its thermal stability, which is one of the most important factors to get good lubricity. By supp...

Air conditioning may affect human health since it has profound effect on our environment, than just lowering temperature. The present study was planned to assess the effect of air conditioners (AC) on pulmonary functions in young healthy non-smoker males. The study group comprised of ten subjects who were using AC's in their cars for at least 1 hr daily since last 6 months. While ten subjects w...

The world is looking towards producing products which consume less power without compromising on quality of life. The increase in use of refrigeration and air conditioning appliances are contributing to global warming. The world wide temperatures are shooting up at an increasing rate. This paper presents a design of roll bond evaporator as the heat exchanger to provide cooling in room air condi...

This work reports on social service activities at the Department of Automotive Engineering, Faculty Universitas Negeri Padang. activity is targeted out-of-school youth in Karang Taruna. The carried out order to increase knowledge and skills repairing maintaining Air Conditioner (AC) system cars. Through this program, it hoped that new experiences can benefit people program by delivering basic t...

Visualization of heat flow often uses complex and challenging programs such as Matlab Ansys Fluent with expensive licenses, the operation is also difficult. This study aims to demonstrate phenomenon convection transfer in a simple way. The fairly difficult, process can cause misconceptions students. An appropriate easy-to-use method needed preparing for classroom learning. was conducted review ...

The MAX1452 is a high-performance analog signal conditioner that has been widely accepted and is used in a variety of industrial and automotive applications. Sensor-output nonlinearity correction is a critical requirement in some applications. Although nonlinearity correction has not been implemented in the MAX1452, it can be achieved simply by using an additional three resistors in the applica...