English to Czech Tech/Engineering Engineering: Industrial Heat exchangers

This term refers to the temperature difference between the leaving process fluid and the entering service fluid. If air is cooled from 300 F to 100 F using 90 F cooling water, the air temperature approaches the water by 10 F (100 – 90 = 10). Such a heat exchanger is said to have a “10 F approach temperature.” The term “approach temperature” is used because it will stay fairly constant with changes in both inlet process and service fluid temperature.