Experimental Study on Energy Saving between Heat Pump Unit of Heat Recovery Fresh Air and Heat Pipe Heat Pump Low Temperature Heat Recovery Unit in the Cold and Severe Cold Regions

In the cold and severe cold regions of our country, the average temperature in winter outdoor usually below -20°C. Air conditioning units was limited and damaged when it running under such conditions. In order to solve the the problems pointed out previously, the paper put forward solutions of the fresh air handling units in combination with heat pump unit of heat recovery fresh air and heat pipe heat pump low temperature heat recovery unit. Comparison energy-saving and recovery period of the two method through experimental research.

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Energy Saving of Air Conditioning System by Oscillating Heat Pipe Heat Recovery Using Binary Fluid

2019 4th Scientific International Conference Najaf (SICN) ◽

10.1109/sicn47020.2019.9019354 ◽

2019 ◽

Author(s):

Anwar S. Barrak ◽

Ahmed A. M. Saleh ◽

Zainab H. Naji

Keyword(s):

Energy Saving ◽

Heat Pipe ◽

Air Conditioning ◽

Heat Recovery ◽

Air Conditioning System ◽

Oscillating Heat Pipe ◽

Binary Fluid ◽

Pipe Heat

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Operation analysis, response and performance evaluation of a pulsating heat pipe for low temperature heat recovery

Energy Conversion and Management ◽

10.1016/j.enconman.2020.113230 ◽

2020 ◽

Vol 222 ◽

pp. 113230 ◽

Cited By ~ 7

Author(s):

Zhixiong Li ◽

M.M. Sarafraz ◽

Arash Mazinani ◽

Hazim Moria ◽

Iskander Tlili ◽

...

Keyword(s):

Performance Evaluation ◽

Low Temperature ◽

Heat Pipe ◽

Heat Recovery ◽

Pulsating Heat Pipe ◽

Operation Analysis ◽

Temperature Heat ◽

And Performance

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Research on Waste Heat Recovery and Utilization of Hydrogen Production Industry Based on Heat Pipe Heat Exchanger Technology

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1033-1034.1362 ◽

2014 ◽

Vol 1033-1034 ◽

pp. 1362-1365

Author(s):

Guang Wu ◽

Jia Hui Song ◽

Jun Feng Chen ◽

Chao Qun Deng

Keyword(s):

Heat Transfer ◽

Low Temperature ◽

Hydrogen Production ◽

Heat Pipe ◽

Heat Recovery ◽

Waste Heat Recovery ◽

High Efficiency ◽

Waste Heat ◽

Technology Improvement ◽

Pipe Heat

For the low temperature waste heat recovery problem, waste heat recycling system was designed based on the heat pipe heat transfer technology of hydrogen in industry. The system is mainly in the process of hydrogen production by methanol steam reforming, using heat pipe excellent thermal conductivity, isothermal and thermal response characteristics, it will be in the low temperature waste heat of flue gas as heat source, in the heat pipe under the action of high efficiency heat transfer, through technology improvement, structure optimization design, achieved high efficiency, energy saved heat transfer to the methanol in the reaction system of hydrogen production, achieved the goal of remaining heat to be recycled.

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A Heat Recovery Device using Oscillating Heat Pipe with Circular and Elliptical Tubes

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.18.1.2021.04.0639 ◽

2021 ◽

Vol 18 (1) ◽

Author(s):

Anwar S. Barrak ◽

Ahmed A. M. Saleh ◽

Zainab H. Naji

Keyword(s):

Heat Exchanger ◽

Energy Saving ◽

Heat Pipe ◽

Heat Recovery ◽

Working Fluid ◽

Cross Sectional ◽

Elliptical Cross ◽

Oscillating Heat Pipe ◽

Comparison Results ◽

Pipe Heat

In this study, an oscillating heat pipe heat exchanger has been used as a heat recovery device in air ductwork, and the characteristics of the thermal performance of the energy-saving were investigated by using a circular and elliptical cross-sectional tubes. An experimental study was conducted by oscillating heat pipe made from copper with an inner diameter of 3.5 mm for the conventional tube, and the major and minor axis of 4.2 and 2.2 mm for the elliptical tube. The working fluid was water with filling ratio of 50% of the total volume. The experimental data implied that the thermal effectiveness and the energy-saving highly affected by the inlet air temperature and velocity. The proposed model of the oscillating heat pipe heat exchanger possessed the effectiveness of 19.5% at 50 ºC and 0.5 m/s, and the potential energy-saving of 1117 W at 50 ºC and 2 m/s. The comparison results between the elliptical and conventional cross-sectional area of oscillating heat pipe heat exchanger indicated that the energy-saving and effectiveness enhanced by the ratio of 18%, and 14%.

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