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

A 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 kWth and hot water temperature in the range of 65–100 °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.

[1]  Daniel Favrat,et al.  Small hybrid solar power system , 2003 .

[2]  Piotr Kolasiński,et al.  The Influence of the Heat Source Temperature on the Multivane Expander Output Power in an Organic Rankine Cycle (ORC) System , 2015 .

[3]  William D'haeseleer,et al.  Comparison of shell-and-tube with plate heat exchangers for the use in low-temperature organic Rankine cycles , 2014 .

[4]  George Papadakis,et al.  EXPERIMENTAL INVESTIGATION OF A SMALL-SCALE TWO STAGE ORGANIC RANKINE CYCLE ENGINE OPERATING AT LOW TEMPERATURE , 2015 .

[5]  D. Manolakosa,et al.  Experimental evaluation of an autonomous low-temperature solar Rankine cycle system for reverse osmosis desalination , 2006 .

[6]  V. Maizza,et al.  Unconventional working fluids in organic Rankine-cycles for waste energy recovery systems , 2001 .

[7]  Saffa Riffat,et al.  Solar energy-gas driven micro-CHP system for an office building , 2006 .

[8]  Vincent Lemort,et al.  Experimental investigation of a reversible heat pump/organic Rankine cycle unit designed to be coupled with a passive house to get a Net Zero Energy Building , 2015 .

[9]  Vincent Lemort,et al.  Experimental study and modeling of an Organic Rankine Cycle using scroll expander , 2010 .

[10]  Jie Ji,et al.  Examination of the expander leaving loss in variable organic Rankine cycle operation , 2013 .

[11]  Lei Shi,et al.  A review of scroll expanders for organic Rankine cycle systems , 2015 .

[12]  E. Galloni,et al.  Design and experimental analysis of a mini ORC (organic Rankine cycle) power plant based on R245fa working fluid , 2015 .

[13]  Vincent Lemort,et al.  Design, modeling and experimentation of a reversible HP/ORC prototype , 2014 .

[14]  Ruzhu Wang,et al.  Simulation and experiments on an ORC system with different scroll expanders based on energy and exergy analysis , 2015 .

[15]  G. Kosmadakis,et al.  On site experimental evaluation of a low-temperature solar organic Rankine cycle system for RO desalination , 2009 .

[16]  Rémi Revellin,et al.  Study of reciprocating pump for supercritical ORC at full and part load operation , 2015 .

[17]  Liang-Liang Shao,et al.  Comparison of heat pump performance using fin-and-tube and microchannel heat exchangers under frost conditions , 2010 .

[18]  Tzu-Chen Hung,et al.  Experimental study and CFD approach for scroll type expander used in low-temperature organic Rankine cycle , 2014 .

[19]  Vincent Lemort,et al.  Experimental study on an open-drive scroll expander integrated into an ORC (Organic Rankine Cycle) system with R245fa as working fluid , 2013 .

[20]  Christos N. Markides,et al.  An assessment of solar-powered organic Rankine cycle systems for combined heating and power in UK domestic applications , 2015 .

[21]  George Papadakis,et al.  Design and Implementation of a Hybrid Low-Concentration PV/Thermal System, Including a Bottoming Supercritical ORC Engine , 2014 .

[22]  George Kosmadakis,et al.  Experimental investigation of a low-temperature organic Rankine cycle (ORC) engine under variable heat input operating at both subcritical and supercritical conditions , 2016 .

[23]  Aleksandra Borsukiewicz-Gozdur,et al.  Exergy analysis for maximizing power of organic Rankine cycle power plant driven by open type energy source , 2013 .

[24]  George Kosmadakis,et al.  Identification of behaviour and evaluation of performance of small scale, low-temperature Organic Rankine Cycle system coupled with a RO desalination unit , 2009 .

[25]  Takahisa Yamamoto,et al.  Design and testing of the Organic Rankine Cycle , 2001 .

[26]  Vincent Lemort,et al.  Experimental characterization of a hermetic scroll expander for use in a micro-scale Rankine cycle , 2012 .

[27]  Saffa Riffat,et al.  Development of a prototype low-temperature Rankine cycle electricity generation system , 2001 .

[28]  Jiang Wang,et al.  Performance evaluation of a low-temperature solar Rankine cycle system utilizing R245fa , 2010 .

[29]  Wojciech Mazurek,et al.  Performance Analysis of a Solar-Powered Organic Rankine Cycle Engine , 2011, Journal of the Air & Waste Management Association.

[30]  Steven Lecompte,et al.  Performance Evaluation of a Helical Coil Heat Exchanger Working under Supercritical Conditions in a Solar Organic Rankine Cycle Installation , 2016 .

[31]  George Papadakis,et al.  Experimental evaluation of an autonomous low-temperature solar Rankine cycle system for reverse osmosis desalination , 2007 .

[32]  Lijun Yu,et al.  Impact of built-in and actual expansion ratio difference of expander on ORC system performance , 2014 .

[33]  Daniel Favrat,et al.  Experimental Investigation of a Hermetic Scroll Expander–Generator. , 1994 .

[34]  Andreas Schuster,et al.  Efficiency optimization potential in supercritical Organic Rankine Cycles , 2010 .

[35]  Patrick Linke,et al.  An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes , 2014 .

[36]  Kyung Chun Kim,et al.  Energy, Exergy and Performance Analysis of Small-Scale Organic Rankine Cycle Systems for Electrical Power Generation Applicable in Rural Areas of Developing Countries , 2015 .

[37]  George Kosmadakis,et al.  An investigation of design concepts and control strategies of a double-stage expansion solar organic Rankine cycle , 2015 .