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Mathematical modeling of scroll comp...

Chen, Yu.

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Mathematical modeling of scroll compressors.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Mathematical modeling of scroll compressors./
作者:	Chen, Yu.
面頁冊數:	209 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4785.
Contained By:	Dissertation Abstracts International65-09B.
標題:	Engineering, Mechanical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3147338
ISBN:	9780496077632

Mathematical modeling of scroll compressors.
Chen, Yu.

Mathematical modeling of scroll compressors. - 209 p.

Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4785.

Thesis (Ph.D.)--Purdue University, 2000.

This thesis presents the development of a comprehensive R-410A scroll compressor model. The model is based on a previously existing R-22 scroll compressor model. This comprehensive compressor model combines a detailed compression process model and an overall compressor model and was used to investigate the compressor's performance under different operating conditions and subject to design changes.

ISBN: 9780496077632Subjects--Topical Terms:

783786
Engineering, Mechanical.

Mathematical modeling of scroll compressors.
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500 $a Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4785.
500 $a Major Professors: Eckhard A. Groll; James E. Braun.
502 $a Thesis (Ph.D.)--Purdue University, 2000.
520 $a This thesis presents the development of a comprehensive R-410A scroll compressor model. The model is based on a previously existing R-22 scroll compressor model. This comprehensive compressor model combines a detailed compression process model and an overall compressor model and was used to investigate the compressor's performance under different operating conditions and subject to design changes.
520 $a The governing mass and energy conservation differential equations were developed for each chamber in the detailed compression process model. Models for the refrigerant flow in the suction process, discharge process as well as the flow due to the radial and flank leakage, models for heat transfer between the gas and scroll wraps, and models for solving the mechanical losses are coupled to the conservation equations. The state of the refrigerant changes with a period of 2pi, and thousands of steps are used to solve the governing differential equations. Each step covers a small angle, such as 2pi/1000 radians. It is assumed that in each step the compressor is in steady state. Iteration is applied until the convergence criteria that the refrigerant returns to the original state after a rotation of 2pi is satisfied.
520 $a In the overall model, compressor components are modeled in terms of six different elements. Steady-state energy balance equations were established using the lumped elements. In combination with the detailed compression process model, these equations were implemented into computer code and are solved iteratively. In this way, the temperature and pressure of the refrigerant in different compressor chambers, the temperature distributions in the scroll wraps, and the temperatures of the other compressor elements can be obtained. Thereafter, power consumption and efficiency of the compressor can be calculated.
520 $a Overall and detailed compressor performance measurements were conducted using a hot-gas bypass compressor load stand. Based on the these measurements, validation of the compressor model was conducted.
520 $a Using the simulation program of the compressor model, parametric studies of the scroll compressor were performed, and the effects of internal leakage and heat transfer losses, and external frictional losses were investigated. Results from these investigations were used to make recommendations for design improvements.
590 $a School code: 0183.
650 4 $a Engineering, Mechanical. $3 783786
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790 1 0 $a Braun, James E., $e advisor
790 $a 0183
791 $a Ph.D.
792 $a 2000
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