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Publication Title | Modelling and simulating microturbine cycle supported by a power turbine and utilized in a single-effect absorption chillier

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Modelling and simulating microturbine cycle supported by a power turbine and utilized in a single-effect absorption chillier

Basim M.A Makhdoum

Mechanical and Systems Engineering Newcastle University

NE1 7RU, UK Basim.makhdoum@ncl.ac.uk

Abstract

This paper presents an overview of PhD research work performed to date on modelling and simulating microturbine cycles. A software package called IPSEpro has been used to model and simulate the base plant. The exhaust waste heat energy was utilized in a single effect absorption chillier. The thermal comparison was carried out based on the electric power output, electric efficiency, carbon footprint and energy utilisation factor (EUF). Also, all models were tested in terms of partial load i.e. 80% of nominated unit capacity. As a result, utilising the exhaust waste heat energy in the absorption chillier has contributed to stabilise the ambient temperature fluctuation. Also the output power has improved by 570 kW, the electric efficiency by 38% and (EUF) has reached 74% at ISO condition i.e. 15oC and 1 bar. In addition, the carbon footprint was reduced by 46%. The simulated results have shown that both turbocharger and absorption chillier will provide an enhancement to the microturbine cycle.

1- Introduction:

Microturbines are small components of modern electricity generators that burn gaseous and liquid fuels creating high-speed rotation which in turn operates the generators. Working in small stationary and automotive gas turbine has very much benefited from recent developments in the microturbine process [1]. Microturbine is a recent development. The vast majority of gas turbines today are jet engines, turboprops or turbo shaft engines. Renowned for their high power to weight ratio, extreme reliability and low maintenance, these engines dominate the aircraft industry. Derivatives of these turbines drive electric utility generators, power pipeline compressors and propel ships. A separate class of industrial gas turbine is used in power generation and other heavy-duty applications [2].

From a historical perspective, microturbines could be traced back to 1988 in North America, where a Co-generation was owned by a person named Herb Retch who also knew someone called Robin MacKay and Jim Noe, two engineers who had left Garrett Corporation after it had merged with Allited Signal. Robin and Jim had then decided to form a company to develop a small gas turbine that might be useful in the automotive market. [2]. However, the history of the microturbine through 2003 includes only a scant 5 years of field and production experience. With all manufactures contributions less than

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