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Research Papers

Parametric Consideration of a Thermal Water Pump and Application for Agriculture

[+] Author and Article Information
Jirawat Sitranon

Department of Energy Technology,
School of Energy, Environment and Materials,
King Mongkut's University of Technology,
Thonburi, Bangkok 10140, Thailand
e-mail: Jirawat_solar@hotmail.com

Charoenporn Lertsatitthanakorn

Department of Energy Technology,
School of Energy, Environment and Materials,
King Mongkut's University of Technology,
Thonburi, Bangkok 10140, Thailand
e-mail: freeconvec@hotmail.com

Pichai Namprakai

Department of Energy Technology,
School of Energy, Environment and Materials,
King Mongkut's University of Technology,
Thonburi, Bangkok 10140, Thailand
e-mail: pichai.nam@kmutt.ac.th

Naris Prathinthong

Department of Energy Technology,
School of Energy, Environment and Materials,
King Mongkut's University of Technology,
Thonburi, Bangkok 10140, Thailand
e-mail: naris.pra@kmutt.ac.th

Taveewat Suparos

Department of Energy Technology,
Faculty of Industrial Education and Technology,
King Mongkut's University of Technology,
Thonburi, Bangkok 10140, Thailand
e-mail: taveewat.sup@hotmail.com

Natthaphon Roonprasang

Department of Alternative Energy
Development and Efficiency,
Ministry of Energy,
17 Rama I Road, Kasatsuk Bridge,
Pathumwan, Bangkok 10330, Thailand
e-mail: mte805@hotmail.com

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received January 2, 2014; final manuscript received November 10, 2014; published online December 23, 2014. Assoc. Editor: Werner Platzer.

J. Sol. Energy Eng 137(3), 031006 (Jun 01, 2015) (12 pages) Paper No: SOL-14-1004; doi: 10.1115/1.4029108 History: Received January 02, 2014; Revised November 10, 2014; Online December 23, 2014

This research studied the effects of suction heads on the efficiency of a thermal water pump with steam. In order to save energy, the authors also studied the appropriate amount of air added to a steam working fluid. Cooling time was attempted to be shorten, direct contact cooling was employed. The system comprised feed water tank (FT), liquid piston tank (LT), heat tank (HT), storage tank (ST), well tank (WT), and check valve (CV). It was directly cooled by cooling water. Thermal energy input was supplied by an electric heater as a substitute of heat sources such as firewood. An operation of the pump consisted of five stages: heating, pumping, vapor-flow, cooling, and suction. In conclusion, increasing the suction head raised the pumping efficiency until the maximum was achieved. Using air in conjunction with the steam working fluid could lower the working temperature suitable for solar application. In addition, the simulation of a thermal pump with steam was merely presented. A good agreement between the test and the model was found. The larger pump size was selected to be constructed and tested in order to increase the pump efficiency. Agricultural application of the larger pump could obtain energy source from waste of firewood at no cost.

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References

Figures

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Fig. 1

A schematic diagram of the ATWP with air–steam and 10 l capacity

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Fig. 2

How to fill up the LT with air

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Fig. 5

Temperatures in the HT (THT), the LT (TLT), and gauge pressure (Pg). Experimental results of the 10 l pump with steam, and 2, 4, and 6 m suction heads within 2 h.

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Fig. 6

The pumping efficiency, pumped water and number of pumping cycles as a function of suction heads within 2 h (experimental results of 10 l pump with steam)

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Fig. 7

The relationship of the pumping efficiency, pumped water, and number of pumping cycles at quantity of air 0%, 10%, 20%, 30%, 40%, and 50% within 1 h for 0.8 m suction head (experimental results of 10 l pump with air–steam)

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Fig. 8

Simulated and experimental temperatures in the HT (THT) and gauge pressure (Pg) in the 10 l pump with steam, and 2 m suction head

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Fig. 9

Simulated and experimental temperatures in the LT (TLT) and gauge pressure (Pg) in the 10 l pump with steam, and 2 m suction head

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Fig. 10

Simulated and experimental temperatures in the HT (THT) and gauge pressure (Pg) in the 10 l pump with steam, and 6 m suction head

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Fig. 11

Simulated and experimental temperatures in the LT (TLT) and gauge pressure (Pg) in the 10 l pump with steam, and 6 m suction head

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Fig. 12

Experimental values of temperature in the steam tank (Tsteam) and the condenser tank (TCT), temperature of cooling water (Tcooling water), and gauge pressure (Pg) in the condenser tank of the 204 l pump with steam and 3 m suction head (water cooling)

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