Thermo-economic analysis of combined different ORCs geothermal power plants and LNG cold energy

Mosaffa, A.H.; Mokarram, N. Hasani; Farshi, L. Garousi

doi:10.1016/j.geothermics.2016.09.004

Cited by 188 publications

(33 citation statements)

References 36 publications

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“…For instance, the investment cost of a supercritical ORC is higher than that of a subcritical one [12,68] Moreover, compared with the subcritical ORC, the supercritical ORC has a higher turbine inlet pressure which affects the safety as well as investment cost [69,70]. When the ORC systems are compared in term of the regenerative and simple (non-regenerative) cycle, there are many studies which prove the superiority of the performance of rORC over simple ORC [71][72][73][74][75][76]. In this study, the best performed subcritical and supercritical rORC is evaluated at a turbine inlet temperature and pressure of 30 bar 166 • C and 38 bar, 166 • C, respectively.…”

Section: Effect Of the Regeneratormentioning

confidence: 99%

Exergy Analysis and Performance Improvement of a Subcritical/Supercritical Organic Rankine Cycle (ORC) for Exhaust Gas Waste Heat Recovery in a Biogas Fuelled Combined Heat and Power (CHP) Engine Through the Use of Regeneration

2019

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In the present study, a subcritical and supercritical regenerative organic Rankine cycle (rORC) was designed. The designed rORCs assist a combined heat and power (CHP) engine, the fuel of which is biogas produced from anaerobic digestion of domestic wastes in Belgium. R245fa was selected as the working fluid for both the subcritical and supercritical rORC. During the parametric optimisation, the net power production, mass flow rate, exchanged heat in the regenerator, total pump power consumption, thermal and exergetic efficiencies of rORC were calculated for varying turbine inlet temperatures and pressures. After parametric optimisation of the rORC, the results were compared with the results of the previous study, in which only a simple ORC is analysed and parametrically optimised. Moreover, the effect of the regenerator was revealed by examining all results together. Finally, the exergetic analysis of the best performing subcritical and supercritical rORC was performed. Furthermore, the results of the present and previous studies were considered together and it is clearly seen that the subcritical rORC shows the best performance. Consequently, by using the subcritical rORC, the disadvantages of the using simple ORC (low performance) and supercritical cycle (safety, investment) can be eliminated and system performance can be improved.

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Section: Effect Of the Regeneratormentioning

confidence: 99%

Exergy Analysis and Performance Improvement of a Subcritical/Supercritical Organic Rankine Cycle (ORC) for Exhaust Gas Waste Heat Recovery in a Biogas Fuelled Combined Heat and Power (CHP) Engine Through the Use of Regeneration

2019

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“…Like any other energy system, the geothermal energy system has multiple ways to convert heat into power. The thermal energy plays a critical role in the conversion process [3][4]. Through the conversion, the total amount of energy remains unchanged, yet the amount of usable energy continues to decrease.…”

Section: Introductionmentioning

confidence: 99%

Game Theory-based Economic Analysis and Incentive Mechanism of Complex Geothermal Energy

Wu¹

2019

IJHT

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Geothermal energy is a key clean energy in China that can be applied in heating, hot springs and aquaculture. However, the recovery of geothermal energy depends heavily on electricity, the market is narrow and the initial investment is very high. Focusing on the geothermal energy development in Beijing, China, this paper applies the game theory to analyze the economy of complex geothermal energy and designs the economic incentive system for geothermal energy. Specifically, the energy analysis and thermoeconomic analysis methods were designed for geothermal energy system, in the light of the thermodynamic laws. The investment cost, specific negative entropy cost and comparable irreversible cost of geothermal energy recovery were examined in details, revealing that the recovery of geothermal resources needs the least investment in Miyun, Haidian and Fangshan, and that Changping has the smallest relative cost difference and energy economics factor in Beijing. In addition, economic incentive measures were put forward, including both tax incentive and financial subsidy. The research findings lay the theoretical basis for expanding the development and utilization of geothermal energy.

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“…By combining the Rankine cycle and refrigeration cycle, the study of Zhang et al [20] showed that both electricity and refrigeration can be produced simultaneously. Mosaffa et al [21] compared four different cycles, and pointed out that different system structure is best when the objective function changes.…”

Section: Introductionmentioning

confidence: 99%

Organic Rankine Cycle for Recovery of Liquefied Natural Gas (LNG) Cold Energy

Bao¹

2018

Organic Rankine Cycle Technology for Heat Recovery

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Natural gas (NG) is an environment-friendly energy source. NG is of gas state in the environmental condition and it is liquefied to LNG at temperature of about −162°C for transportation and storage. Electric energy of 292-958 kWh is consumed when one ton of LNG is produced. Before being used, LNG must be regasified to NG again at the receiving site, and this process will release a great deal of energy, which is called cold energy. It's very important to recovery LNG cold energy, which is clean and of high quality.Power generation is a conventional and effective way to utilize LNG cold energy. For the low efficiency of the traditional power generation system with liquefied natural gas (LNG) cold energy utilization, by improving the heat transfer characteristic between the working fluid and LNG, this chapter has proposed a conception of multi-stage condensation Rankine cycle system. Furthermore, the performance of power generation systems will be enhanced with two aspects: improvement of system configuration and optimization of working fluids.

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Thermo-economic analysis of combined different ORCs geothermal power plants and LNG cold energy

Cited by 188 publications

References 36 publications

Exergy Analysis and Performance Improvement of a Subcritical/Supercritical Organic Rankine Cycle (ORC) for Exhaust Gas Waste Heat Recovery in a Biogas Fuelled Combined Heat and Power (CHP) Engine Through the Use of Regeneration

Exergy Analysis and Performance Improvement of a Subcritical/Supercritical Organic Rankine Cycle (ORC) for Exhaust Gas Waste Heat Recovery in a Biogas Fuelled Combined Heat and Power (CHP) Engine Through the Use of Regeneration

Game Theory-based Economic Analysis and Incentive Mechanism of Complex Geothermal Energy

Organic Rankine Cycle for Recovery of Liquefied Natural Gas (LNG) Cold Energy

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