The simple system in Figure 1 shows the application of the Second Law of Thermodynamics. The compressor (A) adds energy to the refrigerant, and it becomes hot, just the way a hand operated tire pump ...

Air (R-729) is free and plentiful and there are no direct global warming, ozone depletion, and toxic potentials associated with it. In view of these attributes, air cycle air conditioning (referred to ...

Air conditioning eats up over 12 percent of all electricity produced in the United States. So when the government says it's developed a technology that will "revolutionize" how we cool ourselves, it's ...