Optimization of back pressure control of direct air-cooling unit based on GPC

In recent years, direct air cooling units have developed rapidly in China, but in the actual operation, the back-pressure often deviate from the optimal back-pressure, which affect the economy of the unit. The paper has figured out the optimum back-pressure, fan speed and power gain with the method of equivalent enthalpy drop; the paper also worked out the exergy loss of each device before and after the optimization. Through the exergy efficiency analysis of the devices before and after the optimization, we find out that after optimization, exergy loss of the turbine reduces by 0.954MW and the net amount of the generated power increases 130.5kW, the net exergy efficiency of units improves about 0.018 percent points.

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Fuzzy Control Approach of Back Pressure Protection for Direct Air-Cooling Unit

International Journal of Digital Content Technology and its Applications ◽

10.4156/jdcta.vol7.issue6.12 ◽

2013 ◽

Vol 7 (6) ◽

pp. 104-111

Author(s):

Chen Ning

Keyword(s):

Fuzzy Control ◽

Back Pressure ◽

Air Cooling ◽

Control Approach ◽

Cooling Unit

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INTENSIFICATION OF HEAT TRANSFER IN TUBES WITH FLUIDIZED LAYER

Modern Technologies and Scientific and Technological Progress ◽

10.36629/2686-9896-2020-2018-1-12-12 ◽

2020 ◽

Vol 2018 (1) ◽

pp. 12-12

Author(s):

Kirill Zaharov ◽

Aleksey Bal'chugov

Keyword(s):

Heat Transfer ◽

Heat Exchange ◽

Air Cooling ◽

Fluidized Layer ◽

Cooling Unit

It is shown that one of the promising methods of heat exchange intensification in the air-cooling unit is the organization of a fluidized layer.

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Improving the performance of the air-cooling unit in the cooling system of a radar

Journal of Physics Conference Series ◽

10.1088/1742-6596/2057/1/012004 ◽

2021 ◽

Vol 2057 (1) ◽

pp. 012004

Author(s):

Yu A Borisov ◽

V V Volkov-Muzilev ◽

D A Kalashnikov ◽

H S Khalife

Keyword(s):

Heat Exchanger ◽

Gas Flow ◽

Cooling System ◽

Experimental Studies ◽

Air Cooling ◽

Axial Fan ◽

Gas Dynamic ◽

Cooling Unit ◽

Calculation Results ◽

Axial Fans

Abstract The article discusses the issues of reducing the size of the cooling unit of the antenna of a radar station by improving the gas-dynamic processes occurring in the air-cooling unit. The results of the experimental studies of the gas flow in a plate-fin heat exchanger, being blown by one axial fan are presented. The feasibility of changing the number of axial fans for organizing a more uniform flow around the heat-exchange surfaces has been determined by calculation and theoretical methods. The calculation results are confirmed by experimental studies of the air flow in the segment of the heat exchanger, which is provided by a smaller fan.

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Forced-Air Diesel Locomotive Cooling: Prediction of Noise and Energy Consumption Under Realistic Operational Conditions

Volume 4: Ceramics; Concentrating Solar Power Plants; Controls, Diagnostics and Instrumentation; Education; Electric Power; Fans and Blowers ◽

10.1115/gt2013-94588 ◽

2013 ◽

Author(s):

Sebastian Knirsch ◽

Dietmar Mandt ◽

Uwe Mauch ◽

Konrad Bamberger ◽

Thomas Carolus

Keyword(s):

Energy Consumption ◽

Time Domain ◽

Waste Heat ◽

Air Cooling ◽

Diesel Locomotive ◽

Operational Conditions ◽

Cooling Unit ◽

Cooling Module ◽

Forced Air ◽

Power Radiation

An important subsystem in most surface transport vehicles is the forced-air cooling module. Under specific operational conditions of the vehicle the cooling system is the major noise source and the component with the largest consumption of energy. A comprehensive time domain simulation model was developed for simulation of the cooling module in a Diesel locomotive under realistic operational conditions. It includes the components that produce waste heat such as the engine, the turbo transmission, the brake, etc. and the cooling module with its fans. Given the operation of the locomotive e.g. in terms of speed vs. time along a track and its load, data from experimental full scale tests agree well with predictions from the time domain model. The onset of cooling fan operation is predicted well, with it their instantaneous energy consumption and sound radiation. Three optimized cooling unit assemblies for the new locomotive Voith Gravita 15L had been developed and pre-assessed utilizing the model and eventually tested in the locomotive under realistic operational conditions. A new thermodynamically advanced cooling unit with aerodynamically and acoustically optimized fans was found superior by approx. 2 dB (A) less sound power radiation and some 30% less energy consumption as compared to the benchmark. It is anticipated that those advantages are even more distinct as the ambient temperature decreases. The work is part of the European FP7 transport research project ECOQUEST.

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