Experimental investigation of a low-temperature organic Rankine cycle (ORC) engine under variable heat input operating at both subcritical and supercritical conditions

Kosmadakis, George; Manolakos, Dimitris; Papadakis, G.

doi:10.1016/j.applthermaleng.2015.09.082

Cited by 57 publications

(37 citation statements)

References 17 publications

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“…An electric brake (heavy duty unit, manufactured by Bonitron), is connected with the frequency inverter of the expander's induction motor, in order to control the test conditions and evaluate the performance of this expansion machine [25]. The engine cooling during the laboratory tests is accomplished with a cooling water circuit, using a conventional shell-and-tube heat exchanger.…”

Section: The Installed Orc Engine At the Laboratorymentioning

confidence: 99%

“…The organic fluid selected is R-404A after screening many potential fluids using environmental (zero Ozone Depletion Potential e ODP), cost and efficiency criteria [25,26]. Although R-404a has a moderate Global Warming Potential (GWP), there is already a replacement fluid (R-407f) with similar properties but still high cost.…”

Section: The Installed Orc Engine At the Laboratorymentioning

confidence: 99%

“…By regulating the pump speed, the heat input is varied up to almost 55 kW th , being almost linear, as presented with detail in Ref. [25]. In this way the heat input to the ORC can be controlled effectively, while at the same time the flow rate of the organic fluid is adjusted.…”

Section: Laboratory Testsmentioning

confidence: 99%

“…Here, an experimental study is implemented, testing a small-scale ORC with a net capacity of 3 kW. The tests are first conducted in the laboratory with variable heat input and temperature [24,25] for evaluating each key component and the ORC as a whole. Then, the ORC has been coupled with concentrating PV/thermal collectors.…”

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confidence: 99%

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Experimental testing of a low-temperature organic Rankine cycle (ORC) engine coupled with concentrating PV/thermal collectors: Laboratory and field tests

Kosmadakis

Landelle

Lazova

et al. 2016

Energy

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b s t r a c tA detailed experimental investigation of a small-scale low-temperature organic Rankine cycle (ORC) with R-404A is presented. The tests are first conducted at laboratory conditions for detailed evaluation of the main components at both design and off-design conditions, for variable heat input up to 48 kW th and hot water temperature in the range of 65e100 C. A scroll compressor in reverse operation is used as expansion machine and a dedicated helical coil heat exchanger is installed, suitable for high-pressure and temperature operation. The ORC pump is a diaphragm pump coupled with an induction motor. The rotational speeds of both the expander and pump are regulated with frequency inverters, in order to have the full control of the engine operation. The ORC has been then connected with concentrating PV/ thermal collectors, which produce electricity and heat and provide it to the ORC. These field tests are also presented with the overall focus on the performance of the whole ORC unit and its power contribution to the solar field. The tests have revealed that such low-temperature ORC unit can have adequate efficiency and that its coupling with a solar field is feasible, increasing the power production of the whole system.

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Section: The Installed Orc Engine At the Laboratorymentioning

confidence: 99%

Section: The Installed Orc Engine At the Laboratorymentioning

confidence: 99%

Section: Laboratory Testsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Experimental testing of a low-temperature organic Rankine cycle (ORC) engine coupled with concentrating PV/thermal collectors: Laboratory and field tests

Kosmadakis

Landelle

Lazova

et al. 2016

Energy

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“…Полученный фреоно-вый пар подается во фреоновую турбину, где, расши-ряясь, приводит в действие электрогенератор. В каче-стве рабочего тела для органического цикла Ренкина был выбран наиболее широко применяемый в про-мышленности фреон R134a [6,7].…”

Section: методикаunclassified