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Publication Name: Design-theoretical study of cascade CO2 sub-critical mechanical compression butane ejector cooling cycle
Original File Name Searched: Paper_Petrenko_Huang_Ierin_published.pdf
Page Number: 001

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international journal of refrigeration 34 (2011) 1649e1656

www.iifiir.org

available at www.sciencedirect.com

journal homepage: www.elsevier.com/locate/ijrefrig

Design-theoretical study of cascade CO2 sub-critical mechanical compression/butane ejector cooling cycle

V.O. Petrenko a,b,*, B.J. Huang a, V.O. Ierin b

a New Energy Center, Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan

b Odessa State Academy of Refrigeration, Ejector Refrigeration Technology Center, 1/3, Dvoryanskaya St., 65082 Odessa, Ukraine

article info

Article history:

Received 17 February 2010 Received in revised form

3 November 2010

Accepted 27 November 2010 Available online 3 December 2010

Keywords:

Carbon dioxide Butane

Cascade system Vapor Compression Ejector

abstract

In this paper an innovative micro-trigeneration system composed of a cogeneration system and a cascade refrigeration cycle is proposed. The cogeneration system is a combined heat and power system for electricity generation and heat production. The cascade refrigeration cycle is the combination of a CO2 mechanical compression refrigerating machine (MCRM), powered by generated electricity, and an ejector cooling machine (ECM), driven by waste heat and using refrigerant R600. Effect of the cycle operating conditions on ejector and ejector cycle performances is studied. Optimal geometry of the ejector and performance characteristics of ECM are determined at wide range of the operating conditions. The paper also describes a theoretical analysis of the CO2 sub-critical cycle and shows the effect of the MCRM evaporating temperature on the cascade system performance. The obtained data provide necessary information to design a small-scale cascade system with cooling capacity of 10 kW for application in micro-trigeneration systems.

a 2010 Elsevier Ltd and IIR. All rights reserved.

Etude sur la conception et sur un cycle the ́orique de refroidissement a` compression me ́canique en cascade au CO2 subcritique, muni d’un syste`me a` e ́jecteur au butane

Mots cle ́s : Dioxyde de carbone ; Butane ; Syste`me a` cascade ; Vapeur ; Compression ; E ́jecteur

1. Introduction

Trigeneration or combined heating, cooling and power (CHCP) production is becoming an increasingly important energy- saving option, particularly on a small-scale basis. Conven- tional CHCP system is the combination of a traditional

combined heat and power (CHP) system that cogenerates electricity and heat, with an absorption cycle, which is driven by waste heat.

Different types of trigeneration systems can be designed using reliable ejector cooling machines (ECMs) operating with low-boiling point working fluids and powered by waste heat

* Corresponding author. New Energy Center, Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan. Tel.: þ88 62 33662686; fax: þ88 62 23671182.

E-mail addresses: volya@paco.net, volyablacksea@yandex.ru (V.O. Petrenko). 0140-7007/$ e see front matter a 2010 Elsevier Ltd and IIR. All rights reserved. doi:10.1016/j.ijrefrig.2010.11.012

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