The working medium for the megawatt class utilization heat and power complex based on Organic Rankine Cycle

Мильман, О. О.; Shifrin, B. A.; Perov, V. B.; Chebanuk, S. V.

doi:10.1088/1742-6596/1105/1/012094

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…In order not to take into account the cost of the rest of the energy equipment of the recovery plant (pumps, turbines and other auxiliary equipment), it is possible to move from absolute cost values to incremental costs from a certain base level. This allows us to bring the target function to Formula (12). The use of such a target function will be valid if: when changes are made to the operation of the regeneration system, the cost of the rest of the designed equipment remains constant.…”

Section: Technique For Optimizing a Waste Power Plantmentioning

confidence: 99%

“…Additionally, the article [12] considered the use of n-pentane, R134a, fluorocarbon, FP-72, water vapor and air in the organic Rankine cycle for heat recovery at initial parameters of 1.5 MPa and 160 • C. All of the low-boiling coolants considered compared to water vapor and air have a lower speed of sound and higher rates of increase in specific volumes during expansion in the turbine, which makes it necessary to increase the number of its stages.…”

Section: Introductionmentioning

confidence: 99%

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Feasibility Study of Scheme and Regenerator Parameters for Trinary Power Cycles

et al. 2023

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Natural gas-fired combined cycle plants are nowadays one of the most efficient and environmentally friendly energy complexes. High energy efficiency and low specific emissions are achieved primarily due to the high average integral temperature of heat supply in the Brayton–Rankine cycle. In this case, the main sources of energy losses are heat losses in the condenser of the steam turbine plant and heat losses with the exhaust gases of the waste heat boiler. This work is related to the analysis of the thermodynamic and economic effects in the transition from binary to trinary cycles, in which, in addition to the gas and steam–water cycles, there is an additional cycle with a low-boiling coolant. A method for the feasibility study of a waste heat recovery unit for trinary plants is proposed. The schematic and design solutions described will ensure the increased energy and economic performance of combined cycle power plants. Based on the results of the thermodynamic optimization of the structure and parameters of thermal schemes, it was found that the use of the organic Rankine cycle with R236ea freon for the utilization of the low-grade heat of a trinary plant’s exhaust gases operating from a GTE-160 gas turbine makes it possible to achieve a net electrical efficiency of 51.3%, which is a 0.4% higher efficiency for a double-circuit combined cycle gas turbine plant and a 2.1% higher efficiency for a single-circuit cycle with similar initial parameters. On the basis of the conducted feasibility study, the parameters and characteristics of the heat exchangers of the regenerative system of the waste heat recovery unit are substantiated. The use of plain fin-and-tube heat exchangers in the regenerative system of the utilization cycle is the most promising solution. It was found that the level of allowable pressure loss in the regenerator of 10 kPa and the degree of regeneration of 80% allow for maximum economic efficiency of the waste heat recovery unit.

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Section: Technique For Optimizing a Waste Power Plantmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Feasibility Study of Scheme and Regenerator Parameters for Trinary Power Cycles

et al. 2023

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Utilization of heat and power complex with a capacity of 1 MW

Мильман

Shifrin²,

Kuzina³

et al. 2019

J. Phys.: Conf. Ser.

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The results of a compact and mobile heat recovery plant design based on the organic Rankine cycle (ORC) with a capacity of 1 MW, which can meet the gas pumping station auxiliaries in power, are presented. The choice of n-pentane as a working fluid, as the cheapest and most affordable on the market and providing condensation of exhaust steam at the atmospheric pressure, and thermal oil ‘Thermolan LT’ as an intermediate heat carrier has been substantiated. The choice of the work process parameters is focused on reliable long-term work with a minimum amount of maintenance. The plant is designed with the possibility to place its main units outside the technological zone of the main production. The design of the plant main components is presented. The turbine is axial, with five stages with a direct generator drive without a reduction gear. The turbine and generator are placed in a ventilated container. The steam generator is a vertically placed shell-and-tube heat exchanger. The air condenser is with horizontally arranged heat exchange tubes and screw-knurled fins. The recuperator is a shell-and-tube heat exchanger with horizontally arranged longitudinally finned tubes. It has been substantiated that for low-potential heat sources and in the conditions of low air temperatures, the use of heat-recovery plants based on the ORC is the optimal solution.

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