Performance Design of Low Temperature Condenser for Waste Heat Recovery System

Bae, Sukjung; Heo, Hyung-Seok; Park, Jeongsang; Lee, Hong-Yeol; Kim, Charnjung

doi:10.4271/2013-01-0046

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…With HT heat favoring water and LT heat favoring 4 th generation refrigerants (e.g. R1234yf), the combination of these two different classes of fluids were also proposed in water-organic cascade architecture by Bae et al [25]. Additional inorganic cycles in literature included, supercritical CO2, ammonia and Kalina cycle, however, due to the requirement of a low condensing temperature, excessive system pressures for equal performance to refrigerants and complex packaging, respectively, these may be inappropriate options for truck applications [26,27].…”

Section: Review -Inorganicsmentioning

confidence: 99%

Organic Rankine cycle – review and research directions in engine applications

Panesar

2017

E3S Web Conf.

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Abstract. Waste heat to power conversion using Organic Rankine Cycles (ORC) is expected to play an important role in CO2 reductions from diesel engines. Firstly, a review of automotive ORCs is presented focusing on the pure working fluids, thermal architectures and expanders. The discussion includes, but is not limited to: R245fa, ethanol and water as fluids; series, parallel and cascade as architectures; dry saturated, superheated and supercritical as expansion conditions; and scroll, radial turbine and piston as expansion machines. Secondly, research direction in versatile expander and holistic architecture (NOx + CO2) are proposed. Benefits of using the proposed unconventional approaches are quantified using Ricardo Wave and Aspen HYSYS for diesel engine and ORC modelling. Results indicate that, the implementation of versatile piston expander tolerant to two-phase and using cyclopentane can potentially increase the highway drive cycle power by 8%. Furthermore, holistic architecture offering complete utilisation of charge air and exhaust recirculation heat increased the performance noticeably to 5% of engine power at the design point condition.

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Section: Review -Inorganicsmentioning

confidence: 99%