Thermodynamic analysis and optimization of a solar-driven regenerative organic Rankine cycle (ORC) based on flat-plate solar collectors

Wang, Man; Wang, Jiangfeng; Zhao, Yuanyuan; Zhao, Pan; Dai, Yiping

doi:10.1016/j.applthermaleng.2012.08.013

Cited by 204 publications

(83 citation statements)

References 25 publications

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“…In this study, thermal storage is adopted, and it stabilizes the system operation from weather variability. Such an effect is studied by Wang et al [22]. The SORC model expressed is as energy balance between solar cycle, ORC and heat losses as follows: (7) where is the thermal storage internal energy, is the useful heat gain from solar collector, is the heat transfer to the ORC and is the standing heat losses (for a more detailed description of the modelling, see Twomey et al [21]).…”

Section: Application: Dynamic Simulation Of Sorcmentioning

confidence: 99%

“…Considering solar collector performances, the SORC system was designed to be activated at a storage temperature of 120 °C and deactivated at 85 °C. Small-scale SORC system studies [22,23] show that R245fa (1,1,1,3,3-pentafluoropropane) refrigerant has good performance in low and medium heat source temperatures; therefore, R245fa refrigerant was selected as the working fluid. For stable and continuous system operation, the pressure ratio of three was applied (the adopted pressure ratio is relatively low compared to other small-scale SORC studies [22][23][24][25]).…”

Section: Application: Dynamic Simulation Of Sorcmentioning

confidence: 99%

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A Mathematical Model of Hourly Solar Radiation in Varying Weather Conditions for a Dynamic Simulation of the Solar Organic Rankine Cycle

2015

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A mathematical model of hourly solar radiation with weather variability is proposed based on the simple sky model. The model uses a superposition of trigonometric functions with short and long periods. We investigate the effects of the model variables on the clearness (kD) and the probability of persistence (POPD) indices and also evaluate the proposed model for all of the kD-POPD weather classes. A simple solar organic Rankine cycle (SORC) system with thermal storage is simulated using the actual weather conditions, and then, the results are compared with the simulation results using the proposed model and the simple sky model. The simulation results show that the proposed model provides more accurate system operation characteristics than the simple sky model.

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Section: Application: Dynamic Simulation Of Sorcmentioning

confidence: 99%

Section: Application: Dynamic Simulation Of Sorcmentioning

confidence: 99%

A Mathematical Model of Hourly Solar Radiation in Varying Weather Conditions for a Dynamic Simulation of the Solar Organic Rankine Cycle

2015

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“…The condensing temperature is assumed equal to 25 °C. Moreover, the Authors have utilized the values of turbine inlet temperature and pressure suggested by Wang et al [19], reported in Table 3, with the reduction of 9 °C for the inlet temperature.…”

Section: Simulationmentioning

confidence: 99%

“…The values of the most relevant parameters of the system were based on the current pertinent literature, since Wang et al [19] did not provide complete information about their system. Moreover, flow rates are steady-state and, therefore, are not optimized; additionally, the system is characterized by an on-off operation mode.…”

Section: Simulationmentioning

confidence: 99%

A solar pond for feeding a thermoelectric generator or an organic Rankine cycle system

Rocca

Scaccianoce

Peri

et al. 2017

IJHT

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The world energy demand is continuously growing, which means an increase in consumption for all modern fuels or stronger effort on the development and improvement of renewable technologies. Moreover, Developing Countries claims more energy and they have often wide unutilized or unusable lands. The solar energy represents a useful opportunity for these Countries. The Solar Pond is both a solar collector and a thermal storage for long period and is suitable to use in wide sunny areas. Solar pond technology is able to supply heat for several applications requiring low-grade thermal energy or for electrical power production. In order to produce electrical energy from solar ponds it is necessary to use systems fed by low enthalpy sources, such Thermoelectric Generator (TEG) and Organic Rankine Cycle (ORC). In this paper, a model of a Solar Pond for power generation is analyzed in conjunction with an Organic Rankine Cycle. The model has been validated using climate data of an area near to Palermo city (Italy) and exactly the Test Reference Year developed by the Authors.

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“…Amoresano et al [26] studied the cycle efficiency optimization of ORC solar plants, while Villarini et al [27] presented a review of the state of the art of small-scale solar powered ORC systems. The design of an ORC operating with solar heat to produce sanitary water, the thermodynamic performance of regenerative ORC based on flat-plate solar collectors and a supercritical ORC system driven by linear Fresnel reflector solar collector have been investigated in [28][29][30], while the potential of solar-power systems based on ORC technology that convert thermal energy from simple and low-cost non-concentrated or low-concentration collectors to mechanical, hydraulic or electrical energy has been evaluated by Markides [31].…”

Section: Introductionmentioning

confidence: 99%

Biogas Engine Waste Heat Recovery Using Organic Rankine Cycle

Benato

Macor

2017

Energies

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Abstract:Italy is a leading country in the biogas sector. Energy crops and manure are converted into biogas using anaerobic digestion and, then, into electricity using internal combustion engines (ICEs). Therefore, there is an urgent need for improving the efficiency of these engines taking the real operation into account. To this purpose, in the present work, the organic Rankine cycle (ORC) technology is used to recover the waste heat contained in the exhaust gases of a 1 MW el biogas engine. The ICE behavior being affected by the biogas characteristics, the ORC unit is designed, firstly, using the ICE nameplate data and, then, with data measured during a one-year monitoring activity. The optimum fluid and the plant configuration are selected in both cases using an "in-house" optimization tool. The optimization goal is the maximization of the net electric power while the working fluid is selected among 115 pure fluids and their mixtures. Results show that a recuperative ORC designed using real data guarantees a 30% higher net electric power than the one designed with ICE nameplate conditions.

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Thermodynamic analysis and optimization of a solar-driven regenerative organic Rankine cycle (ORC) based on flat-plate solar collectors

Cited by 204 publications

References 25 publications

A Mathematical Model of Hourly Solar Radiation in Varying Weather Conditions for a Dynamic Simulation of the Solar Organic Rankine Cycle

A Mathematical Model of Hourly Solar Radiation in Varying Weather Conditions for a Dynamic Simulation of the Solar Organic Rankine Cycle

A solar pond for feeding a thermoelectric generator or an organic Rankine cycle system

Biogas Engine Waste Heat Recovery Using Organic Rankine Cycle

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