Refrigeration generation using expander-generator units

Клименко, А. В.; Agababov, V. S.; Koryagin, A. V.; Baidakova, Yu. O.

doi:10.1134/s0040601516050037

Cited by 3 publications

(2 citation statements)

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“…Тригенерацияэффективный способ удовлетворения потребителей электроэнергией, теплотой и холодом, необходимыми в различных отраслях промышленности (для реализации технологических процессов), а также в сфере услуг и жилищно-коммунальном хозяйстве [1]. В определенных условиях тригенерация позволяет снизить затраты топливно-энергетических ресурсов и улучшить экологические показатели генерирующих установок [2].…”

Section: Introductionunclassified

“…Для анализа экологической целесообразности применения хладагентов используют такие параметры, как озоноразрушающий потенциал (ОРП) и потенциал глобального потепления (парникового эффекта). Для хладагентов группы хлорфторуглеродов ОРП ≥ 1, гидрохлорфторуглеродов ОРП < 0,1, гидрофторуглеродов ОРП = 0 [2].…”

Section: Introductionunclassified

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Trigeneration Turbine Units Based on Low Boiling Working Fluids

Ovsyannik

Kliuchinski

2022

Izv. vysh. ucheb

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A program that allows modeling, thermodynamically optimizing and performing exergetic analysis of more than a hundred different variations of the schemes of trigeneration turbine units based on low-boiling working fluids. With the aid of the program that had been developed, an exergetic analysis of six schemes of trigeneration turbine units on the organic Rankine cycle was performed, viz. on an overheated steam with a steam compression refrigeration unit; with an intermediate overheating of the working fluid and a steam compression refrigeration unit; on an overheated steam with a refrigeration unit with carbon dioxide production; with an intermediate overheating of the working fluid and a refrigeration unit with carbon dioxide production; on an overheated steam with a refrigeration unit with production carbon dioxide and cooling of the turbine condenser with liquid carbon dioxide; with intermediate overheating of the working fluid, a refrigeration unit with carbon dioxide production and cooling of the turbine unit condenser with liquid carbon dioxide. A gas turbine unit was used as an energy source for the above-mentioned schemes. The possibility of using the resulting liquid carbon dioxide to cool the condenser of a turbine unit on an organic Rankine cycle has been studied. A comparative analysis of two methods of obtaining cold (using a steam compression refrigeration unit and a refrigeration unit with carbon dioxide production) for use in trigeneration schemes has been carried out. The research was based on the method of exergetic analysis, the results of which are presented in the form of enlarged Grassmann – Shargut diagrams. A technical and economic analysis of the use of intermediate overheating in the organic Rankine cycle has been carried out, ozone-safe freon R245FA was used as the working fluid. Recommendations for the application of the studied trigeneration schemes on the organic Rankine cycle are formulated.

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Section: Introductionunclassified

Trigeneration Turbine Units Based on Low Boiling Working Fluids

Ovsyannik

Kliuchinski

2022

Izv. vysh. ucheb

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A Fuel-Free Trigeneration Plant at Stations for Technological Reduction of Transported Natural Gas Pressure

et al. 2018

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Selection, Calculation and Thermodynamic Analysis of Turbine Units Based on the Organic Rankine Cycle

Ovsyannik

Kliuchinski

2022

Izv. vysh. ucheb

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A program has been developed for the selection, calculation and thermodynamic analysis of turbine units based on the organic Rankine cycle, which makes it possible to determine the values of the optimal parameters of the working fluid, as well as to select the working fluid with the highest exergetic efficiency for cycles on superheated steam and with intermediate overheating. The structure of the developed mathematical model for thermodynamic analysis is presented. The studies were conducted at pressures up to 20 MPa and temperatures of the working fluid in front of the turbine up to 250 °C; the temperature of the working fluid at the outlet of the condenser was 25 °C, while the maximum temperature of the working fluid at the outlet of the intermediate superheater was 250 °C. The analysis of the results showed that the use of reheating in the organic Rankine cycle – as well as in the classical (i. e. steam turbine) one – led to higher exergic efficiency of the cycle. On average, for the studied working media, the increase in exergetic efficiency at optimal parameters of the working body was 4.28 %. However, some working media significantly exceeded this result (for example, 8.14 and 6.56 % for R717 and R32, respectively) due to their thermophysical properties. The error for all low-boiling working media did not exceed 2 % of the obtained result of exergetic efficiency. Grassmann – Shargut charts were made for the studied circuits using the example of the refrigerant R245FA. Exergetic analysis demonstrated that intermediate overheating at thermodynamically optimal parameters of the working media before the high and low pressure parts of the turbine causes a decrease in exergy losses in the heat recovery boiler, a significant increase in regeneration in the heat exchanger, an increase in exergy losses in the pump and their redistribution in the turbine unit, heat exchanger and condenser.

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Refrigeration generation using expander-generator units

Cited by 3 publications

References 0 publications

Trigeneration Turbine Units Based on Low Boiling Working Fluids

Trigeneration Turbine Units Based on Low Boiling Working Fluids

A Fuel-Free Trigeneration Plant at Stations for Technological Reduction of Transported Natural Gas Pressure

Selection, Calculation and Thermodynamic Analysis of Turbine Units Based on the Organic Rankine Cycle

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