Integrated Steam/Organic Rankine Cycle (ISORC) for Waste Heat Recovery in Distributed Generation and Combined Heat and Power Production

Chudnovsky, Yaroslav; Gotovsky, Mikhail; Arefiev, Valentin; Greenman, Mark; Fomin, V. F.; Khinkis, M.J.

doi:10.1115/ihtc14-22704

Cited by 2 publications

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“…Various sources of waste heat, the possibilities of using it, and constraints connected with commercially available ORC based systems were analyzed, and the integrated steam-water⎯organic Rankine cycle (ISORC) [3] was taken as a basis of the innovative development concept from that analysis. The main idea of this concept consists in using a back pressure steam turbine and the ORC, in which butane serves as working fluid (Fig.…”

Section: The Concept Of the Integrated Steam-water-organic Rankine Cyclementioning

confidence: 99%

Use of combined steam-water and organic rankine cycles for achieving better efficiency of gas turbine units and internal combustion engines

Gotovskiy¹,

Grinman

Fomin

et al. 2012

Therm. Eng.

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Original Russian Text © M.A. Gotovskiy, M.I. Grinman, V.I. Fomin, V.K. Aref'ev, A.A. Grigor'ev, 2012, published in Teploenergetika. 236 Problems of achieving better energy efficiency and more efficient use of waste heat from energy intense production processes are nowadays very pressing ones. Considerable experience with construction of waste heat recovery systems has been gained at Ormat, Sie mens, Turboden, and other companies; however, real efficiencies of cycles that are implemented are limited to around 18%.The problem of rationally using energy resources has attracted great attention of specialists since the middle of the past century, the time when rapid growth of industrial production generated the need to make it more energy efficient. In many industries generating by products and fuel (e.g., black leach and wood in the pulp and paper industry, synthesis gas in the petroleum refining indus try, light gas mixtures obtained as a result of processing chemical substances, blasting gases in steel industries, etc.) it is possible to avoid losses of energy by utilizing it in one form or another. The problems of losses in systems using renewable sources of energy (solar, geo thermal, and wind energy) for generating electricity are usually considered separately.Losses exist also in energy conversion systems (e.g., in heat exchangers, industrial heaters, pumps, and motors), the efficiency of which is limited by thermal or mechanical factors.Of course, heat losses-i.e., the produced heat that could not be usefully utilized by the consumer and was rejected into the environment-occupy the main place in the wide spectrum of energy losses. It should be noted that more than 75% of industrial heat wastes have temperature below 800 K, due to which applica tion of usual technologies, e.g., the Rankine steamwater cycle, for producing electricity is inefficient. THE ORGANIC RANKINE CYCLEThere are a few basic technologies using which low temperature waste heat can be utilized. For exam ple, for the last 20 years energy has been generated on the basis of the organic Rankine cycle (ORC) at power stations with capacities ranging from 300 kW to 130 MW operating on different sources of heat [1, 2]. Other alternative versions are either technically impossible or economically inefficient. Leading pro ducers of ORC based installations have gained great experience from using low boiling organic substances for producing electricity and have demonstrated that this cycle is well suited for low temperature sources of heat. The ORC technology is applicable for recovering heat of medium size gas turbines (GTs), cement plants, and geothermal sources, and yields consider able advantages as compared with the use of low tem perature steam turbines. The majority of existing sys tems operating at higher temperatures are fitted with a recovery unit (Fig. 1) between the heat source itself and organic working fluid (e.g., high temperature oil). The efficiency of electricity generaton using recovered heat of industrial wastes in ORC based systems...

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Section: The Concept Of the Integrated Steam-water-organic Rankine Cyclementioning

confidence: 99%

Use of combined steam-water and organic rankine cycles for achieving better efficiency of gas turbine units and internal combustion engines

Gotovskiy¹,

Grinman

Fomin

et al. 2012

Therm. Eng.

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Features of Calculating the Characteristics of Energy Complexes Using Low-Grade Energy

Dmitrenko

Kolosova

2021

Mir transp.

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The development of stationary energy seems to be an important aspect of introduction of energy-saving technologies in transportation sector. In Russia, it is conditioned by the main provisions of the Energy Strategy of the Russian Federation until 2030. In this regard, the problem of efficient use of low-grade heat based on the organic Rankine cycle (ORC) in stationary heat energy supply units in the transport industry is urgent. In particular, this task is typical for boiler houses converted from heavy fuel oil to gas fuel. In this case, the efficiency of ORC application will primarily be determined by the efficiency of the used heat exchangers (HE) with a phase transition, as a result of which, both technically and theoretically, the problem of designing and calculating the optimal characteristics of these HE will be of great interest.The article presents a theoretical and computational model of heat transfer during phase transitions in turbulent flows based on the relations obtained by the stochastic theory of hydrodynamics and heat transfer. The modelling of the effect of turbulence during the phase transition with undeveloped boiling of the bubble mode is considered. The comparison results show satisfactory conformity of the values obtained according to the formula based on stochastic equations with the values calculated according to the empirical formula for the flow in a pipe, used in the engineering method of designing heat exchangers. The results obtained open the prospect for studying the processes of heat transfer during phase transitions in turbulent flows of HE to reduce their overall and mass characteristics, as well as to increase the energy efficiency of both the devices themselves and the efficiency of the entire energy complex.

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Integrated Steam/Organic Rankine Cycle (ISORC) for Waste Heat Recovery in Distributed Generation and Combined Heat and Power Production

Cited by 2 publications

References 0 publications

Use of combined steam-water and organic rankine cycles for achieving better efficiency of gas turbine units and internal combustion engines

Use of combined steam-water and organic rankine cycles for achieving better efficiency of gas turbine units and internal combustion engines

Features of Calculating the Characteristics of Energy Complexes Using Low-Grade Energy

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