Design and experimental analysis of a mini ORC (organic Rankine cycle) power plant based on R245fa working fluid

Galloni, Enzo; Fontana, G.; Staccone, S.

doi:10.1016/j.energy.2015.07.104

Cited by 112 publications

(30 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…15% e n/a [18] Gas n/a R123 n/a 0.4 kW (a) WHR Water Water 89 C e n/a Shell-and-Tube e PHE n/a 90 C e n/a n/a 6.1 bar e 0.7 bar Rotary Vane e El. DC n/a [19] n/a n/a a Calculated by authors of this paper with data from the reference.…”

mentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

mentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…Regarding the available experimental studies screened thanks to the Landelle et al [23] database, two working fluids have been principally investigated in the corresponding ORC literature: R-245fa [24,25] and R-123 [26,27]. Galloni et al [28] and Chang et al [29] both studied an ORC system with a scroll expander and R-245fa as the working fluid in an ORC system. The heat source is below 100 • C for both studies, and the results lead respectively to a maximum power production of 1.17 kW and 1.56 kW, and maximum thermal efficiencies of 9.28% and 9.43%.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Optimization of the Organic Rankine Cycle with Pure NovecTM649 and Zeotropic Mixture NovecTM649/HFE7000 as Working Fluid

et al. 2019

View full text Add to dashboard Cite

The Organic Rankine Cycle (ORC) is widely used in industry to recover low-grade heat. Recently, some research on the ORC has focused on micro power production with new low global warming potential (GWP) replacement working fluids. However, few experimental tests have investigated the real performance level of this system in comparison with the ORC using classical fluids. This study concerns the experimental analysis and comparison of a compact (0.25 m3) Organic Rankine Cycle installation using as working fluids the NovecTM649 pure fluid and a zeotropic mixture composed of 80% NovecTM649 and 20% HFE7000 (mass composition) for low-grade waste heat conversion to produce low power. The purpose of this experimental test bench is to study replacement fluids and characterize them as possible replacement fluid candidates for an existing ORC system. The ORC performance with the pure fluid, which is the media specifically designed for this conversion system, shows good results as a replacement fluid in comparison with the ORC literature. The use of the mixture leads to a 10% increase in the global performance of the installation. Concerning the expansion component, an axial micro-turbine, its performance is only slightly affected by the use of the mixture. These results show that zeotropic mixtures can be used as an adjustment parameter for a given ORC installation and thus allow for the best use of the heat source available to produce electricity.

show abstract

“…For the system design, Galloni et al proposed a simple 1.2 kW ORC system with R245fa as the working fluid, which proved the feasibility of the small‐scale ORC system (1‐3 kW) with low‐temperature thermal energy (lower than 100°C in the investigation). Micheli et al tested a multiple expansion small‐scale ORC system, and results show that multiple expansion configurations (from 1 + 2 to 1 + 5) allow reaching higher cycle efficiency and higher specific work.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on a small-scale pumpless organic Rankine cycle with R1233zd(E) as working fluid at low temperature heat source

Wang

et al. 2019

Int J Energy Res

View full text Add to dashboard Cite

Summary This paper focuses on the novelty pumpless organic Rankine cycle (ORC) and its choice of working fluids. Based on the selection criteria, the refrigerant of R1233zd(E) is firstly chosen and investigated in the pumpless ORC system. In the system, the feed pump is removed, and the refrigerant flows back and forth between two heat exchangers, which act as the evaporator or condenser, respectively. The impacts of the heating water temperature and loads on the system performance are studied to find out the best operating conditions. The low‐grade heat source is simulated by an electric boiler. The temperature of the heat resource ranges from 80°C to 100°C with the interval of 5°C. The temperature of the cooling water inlet is 10°C and is kept constant. The largest average power output is 127 W under the condition of 100°C heating water with nine loads. Because the cycle efficiency with heating steam temperature of 100°C cannot be determined, the highest energy and exergy efficiencies are 3.5% and 17.1%, respectively, for heating water of 95°C with seven loads. The experimental results show that the energy and exergy efficiencies increase with the increase of the heating temperature. The power and current outputs increase when the loads increase under the condition of the constant heating water temperature, whereas the voltage output decreases meanwhile. The generating time increases when the loads increase. This phenomenon is mainly caused by the increasing evaporating pressure and decreasing condensing pressure when the loads increases.

show abstract

Design and experimental analysis of a mini ORC (organic Rankine cycle) power plant based on R245fa working fluid

Cited by 112 publications

References 17 publications

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

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

Experimental Study and Optimization of the Organic Rankine Cycle with Pure NovecTM649 and Zeotropic Mixture NovecTM649/HFE7000 as Working Fluid

Experimental study on a small-scale pumpless organic Rankine cycle with R1233zd(E) as working fluid at low temperature heat source

Contact Info

Product

Resources

About