System Description System Efficiency AC, baseline efficiency scenario 61% AC, newer system components 83% AC, introduction of UPS with high-efficiency mode 87.5% AC, eliminating the PDU and distributing 480/277V 89% AC, eliminating the PDU and distributing 400/230V 89% DC, narrow voltage range distribution 86% The controlling system used to control the temperature of the car by sensing it and control the refrigerating system. Air conditioning has two main purposes: 1. Cools the air entering the passenger compartment 2. Removes the moisture from the air so it feels more comfortable inside the vehicle. Components of Car AC packages are rooftop HVAC systems, air conditioning units for rooms, and air-to-air heat pumps. With central systems, the primary conversion from fuel such as gas or electricity takes place in a central location, with some form of thermal energy distributed throughout the building or facility. International Journal of Electronics, Electrical and Computational System IJEECS ISSN 2348-117X Volume 7, Issue 4 April 2018 Understanding Flexible AC Transmission Systems (FACTS) Controllers: A Description Mamta Bagoria Student M.Tech.(PED) Department of Electrical Engineering, Subharti University, Meerut, UP, India Sanjiv Kumar Department of Electrical Engineering, Subharti University With the invention of the R-12 in 1928 by GM researchers, the dawn of the automotive air-conditioning started. The first prototype self-contained system was installed in a 1939 Cadillac. Packard Motor Company in 1939 was the first company to offer complete auto air-conditioning system for cooling in summer and heating in winter using R12 the sysvrf modular systems are the most valuable solu- tions for room space from 100 to 2000 sq.m. with large independence of climatic zones - hotels, restaurants, retail, office buildings, etc. up to 3 modular outdoor units can be combined in one single refrigerant system thus reaching up to 270 kw of cooling capacity and connect- ing up to 64 …