A calibrated organic Rankine cycle dynamic model applying to subcritical system and transcritical system

Cai, Jing; Tian, Hua; Wang, Xuan; Wang, Rui; Wang, Mingtao

doi:10.1016/j.energy.2021.121494

Cited by 16 publications

(1 citation statement)

References 53 publications

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“…1,2 In this context, integrated energy systems appear an attractive solution to meet the energy requests of various users, [3][4][5] increase efficiency and flexibility, [6][7][8] and reduce emissions. [9][10][11] Among the available technologies, internal combustion engines (ICE), 12,13 and organic Rankine cycles (ORC) 14,15 are in the spotlight of the industry and research community. 16,17 Particularly, the internal combustion engine is a well-known and reliable technology with the prospect to maintain a preeminent role in the next future.…”

Section: Introductionmentioning

confidence: 99%

Integration of biodiesel internal combustion engines and transcritical organic Rankine cycles for waste‐heat recovery in small‐scale applications

Falbo

Perrone

Morrone

et al. 2021

Intl J of Energy Research

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The aim of the work is the analysis of a novel integrated energy system for small-scale combined heat and power (CHP) generation. The system consists of a topping biodiesel-fired internal combustion engine (ICE) and a bottoming transcritical organic Rankine cycle (TORC) for waste-heat recovery. Specifically, the engine exhaust gas provides energy to the TORC sub-system, while the energy contribution of the ICE cooling circuit assures low-temperature heat generation. Furthermore, a thermal energy storage (TES) unit for the exploitation of the thermal surplus and an auxiliary boiler are present. A mathematical model is developed to evaluate the main performances at full and partial load in terms of thermal and electric production, efficiency, fuel consumption, and primary energy saving. A preliminary analysis is carried out to find the proper organic working fluid for the TORC sub-system. Afterwards, the biodiesel ICE-TORC combined system is adopted to satisfy thermal and electric requests of a commercial centre. To this purpose, hourly energy balances are evaluated, and a techno-economic analysis is performed on an annual basis. The investigated system guarantees a 16.7% primary energy saving and an 8.4 years payback time.

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