First and Second Law Analysis of Radical Intercooling Concepts

Thulin, Oskar,1987Chalmers tekniska högskola,Chalmers University of Technology (author)

An exergy framework was developed taking into consideration a detailed analysis of the heat exchanger (HEX) (intercooler (IC)) component irreversibilities. Moreover, it was further extended to include an adequate formulation for closed systems, e.g., a secondary cycle (SC), moving with the aircraft. Afterward, the proposed framework was employed to study two radical intercooling concepts. The first proposed concept uses already available wetted surfaces, i.e., nacelle surfaces, to reject the core heat and contributes to an overall drag reduction. The second concept uses the rejected core heat to power a secondary organic Rankine cycle and produces useful power to the aircraft-engine system. Both radical concepts are integrated into a high bypass ratio (BPR) turbofan engine, with technology levels assumed to be available by year 2025. A reference intercooled cycle incorporating a HEX in the bypass (BP) duct is established for comparison. Results indicate that the radical intercooling concepts studied in this paper show similar performance levels to the reference cycle. This is mainly due to higher irreversibility rates created during the heat exchange process. A detailed assessment of the irreversibility contributors, including the considered HEXs and SC, is made. A striking strength of the present analysis is the assessment of the component-level irreversibility rate and its contribution to the overall aero-engine losses.

Petit, Olivier,1980Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)olivierp (author)
Xisto, Carlos,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)xisto (author)
Zhao, Xin,1986Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)zxin (author)
Grönstedt, Tomas,1970Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)thgr (author)
Chalmers tekniska högskola (creator_code:org_t)

In:Journal of Engineering for Gas Turbines and Power: ASME International140:8, s. 081201-081201-101528-89190742-4795

By the author/editor: Thulin, Oskar, 1 ...; Petit, Olivier, ...; Xisto, Carlos, 1 ...; Zhao, Xin, 1986; Grönstedt, Tomas ...

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Aerospace Engine ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Energy Engineeri ...

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