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Development of a prototype thermoele...

Zhao, Dongliang.

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Development of a prototype thermoelectric space cooling system using phase change material to improve the performance.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Development of a prototype thermoelectric space cooling system using phase change material to improve the performance./
Author:	Zhao, Dongliang.
Description:	168 p.
Notes:	Source: Dissertation Abstracts International, Volume: 76-01(E), Section: B.
Contained By:	Dissertation Abstracts International76-01B(E).
Subject:	Engineering, Mechanical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3636092
ISBN:	9781321175059

Development of a prototype thermoelectric space cooling system using phase change material to improve the performance.
Zhao, Dongliang.

Development of a prototype thermoelectric space cooling system using phase change material to improve the performance. - 168 p.

Source: Dissertation Abstracts International, Volume: 76-01(E), Section: B.

Thesis (Ph.D.)--University of Wyoming, 2014.

The thermoelectric cooling system has advantages over conventional vapor compression cooling devices, including compact in size, light in weight, high reliability, no mechanical moving parts, no refrigerant, being powered by direct current, and easily switching between cooling and heating modes. However, it has been long suffering from its relatively high cost and low energy efficiency, which has restricted its usage to niche applications, such as space missions, portable cooling devices, scientific and medical equipment, where coefficient of performance (COP) is not as important as reliability, energy availability, and quiet operation environment.

ISBN: 9781321175059Subjects--Topical Terms:

783786
Engineering, Mechanical.

Development of a prototype thermoelectric space cooling system using phase change material to improve the performance.
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020 $a 9781321175059
035 $a (MiAaPQ)AAI3636092
035 $a AAI3636092
040 $a MiAaPQ $c MiAaPQ
100 1 $a Zhao, Dongliang. $3 2105955
245 1 0 $a Development of a prototype thermoelectric space cooling system using phase change material to improve the performance.
300 $a 168 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-01(E), Section: B.
500 $a Adviser: Gang Tan.
502 $a Thesis (Ph.D.)--University of Wyoming, 2014.
520 $a The thermoelectric cooling system has advantages over conventional vapor compression cooling devices, including compact in size, light in weight, high reliability, no mechanical moving parts, no refrigerant, being powered by direct current, and easily switching between cooling and heating modes. However, it has been long suffering from its relatively high cost and low energy efficiency, which has restricted its usage to niche applications, such as space missions, portable cooling devices, scientific and medical equipment, where coefficient of performance (COP) is not as important as reliability, energy availability, and quiet operation environment.
520 $a Enhancement of thermoelectric cooling system performance generally relies on two methods: improving thermoelectric material efficiency and through thermoelectric cooling system thermal design. This research has been focused on the latter one. A prototype thermoelectric cooling system integrated with phase change material (PCM) thermal energy storage unit for space cooling has been developed. The PCM thermal storage unit used for cold storage at night, functions as the thermoelectric cooling system's heat sink during daytime's cooling period and provides relatively lower hot side temperature for the thermoelectric cooling system. The experimental test of the prototype system in a reduced-scale chamber has realized an average cooling COP of 0.87, with the maximum value of 1.22. Another comparison test for efficacy of PCM thermal storage unit shows that 35.3% electrical energy has been saved from using PCM for the thermoelectric cooling system.
520 $a In general, PCM faces difficulty of poor thermal conductivity at both solid and liquid phases. This system implemented a finned inner tube to increase heat transfer during PCM charging (melting) process that directly impacts thermoelectric system's performance. A simulation tool for the entire system has been developed including mathematical models for a single thermoelectric module, for the thermoelectric cooling unit, for the PCM thermal storage unit, and for the outdoor air-water heat exchanger. When modeling PCM thermal storage unit, the enthalpy method has been adopted. Since natural convection has been observed in experiments playing a key effect on heat transfer in PCM, a staged effective thermal conductivity (ke) concept and modified Rayleigh (Ra) number formula have been developed to better capture natural convection's variable effects during the PCM charging process. Therefore, a modeling-based design procedure for thermoelectric cooling system integrating with PCM has been proposed. A case study has been completed for a model office room to demonstrate the qualitative and quantitative evaluations to the major system components.
520 $a Results of this research can be extended to other applications in relevant areas. For instance, the proposed PCM thermal storage unit can be applied to integration with water-cooled conventional air-conditioning devices. Instead of using water cooling, a case study of using the proposed PCM unit for a water-cooled air-conditioner shows a COP increase of more than 25.6%.
590 $a School code: 0264.
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Energy. $3 876794
650 4 $a Engineering, General. $3 1020744
690 $a 0548
690 $a 0791
690 $a 0537
710 2 $a University of Wyoming. $b Civil & Architectural Engineering. $3 1023756
773 0 $t Dissertation Abstracts International $g 76-01B(E).
790 $a 0264
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3636092