By Detlev Kroger
This new textual content represents the main certain and complete e-book providing glossy perform and idea suitable to the thermal-flow functionality overview, layout, and optimization of air-cooled warmth exchangers and cooling towers. Kroger presents smooth analytical and empirical instruments used to judge the thermal-flow functionality and layout of air-cooled warmth exchangers and cooling towers. He additionally covers tips on how to arrange better requisites and overview extra severe bids with recognize to thermal functionality of latest cooling platforms. additional, Kroger explores development probabilities with admire to retrofits of latest cooling devices in addition to attainable affects of plant operations and environmental affects.
Read or Download Air-cooled Heat Exchangers And Cooling Towers: Thermal-flower Performance Evaluation And Design, Vol. 2 PDF
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Additional info for Air-cooled Heat Exchangers And Cooling Towers: Thermal-flower Performance Evaluation And Design, Vol. 2
American Petroleum Institute , Air-Cooled Heat Exchangers for General Refinery Services, API Standard 661, American Petroleum Institute, Washington, 1978. American Society of Heating Refrigerating and Air-Conditioning Engineers, “Laboratory Methods of Testing Fans for Rating Purposes,” ASHRAE Standard 5175, 1975. American Society of Mechanical Engineers, Performance Test Codes - General Instructions, PTC 1, 1980. American Society of Mechanical Engineers, Test Code for Fans, ASME PTC 11-1946, New York, 1946.
Wherever possible, the fan should be tested together with the appropriate diffuser to give fan/diffuser performance characteristics that can be used for design purposes. qxd 6/14/04 1:49 PM Page 33 FANS REFERENCES Air Moving and Conditioning Association, “Laboratory Methods of Testing Fans for Rating Purposes,” Air Moving and Conditioning Association Standard 210-274, 1974. American Petroleum Institute , Air-Cooled Heat Exchangers for General Refinery Services, API Standard 661, American Petroleum Institute, Washington, 1978.
3) or preferably to the right of this point. It is also important not to operate a fan such that the blade-passing frequency or one of its dominant harmonics is close to the natural vibration frequency of a blade. The maximum power input to the fan is required when the ambient air temperature is at its lowest and its density is high. In instances where blades are mechanically adjusted for summer and winter operation, the motor should be oversized by 15% according to Paikert. Smaller fans are usually driven by V-belts (30–40 kW), while various types of reduction gears are employed for higher driving powers.