cooling mechanisms internal combustion motors 41 air-conditioning 36 cooling 34 compressors 30 coolants 28 environment protection 10 more ... thermal pumps 10 gasworks industry 7 savings 7 energy 6 gas engines 6 history 5 mathematical models 5 composition 5 thermodynamics 5 heating 5 calculations 5 ventilation and air-conditioning 5 business balance sheet 4 waste heat 4 breweries 4 gases 4 regulation 4 mechanical engineering 4 industrial air conditioning 4 solar energy sources 3 ice 3 materials handling 3 carbon dioxide 3 less ...