Use of a turboexpander in steam power units for heat energy recovery in heat supply systems
- Authors: Sadykov R.A.1, Daminov A.Z.2, Solomin I.N.3, Futin V.A.4
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Affiliations:
- Kazan State University of Architecture and Engineering
- Kazan Scientific Center, Russian Academy of Sciences
- OAO Kazenergo
- ZAO NIIturbokompressor
- Issue: Vol 63, No 5 (2016)
- Pages: 360-366
- Section: Steam Turbines, Gas Turbines, Combined-Cycle Plants and Their Accessories
- URL: https://journals.rcsi.science/0040-6015/article/view/172280
- DOI: https://doi.org/10.1134/S0040601516030113
- ID: 172280
Cite item
Abstract
A method for raising the efficiency of a boiler plant by installing a unit operating by the organic Rankine cycle is presented. Such units allow one to generate electricity to cover the auxiliaries of a heat source at a heat-transfer fluid temperature of no more than 130°С. The results of commissioning tests of boilers revealed that their efficiency is maximized under a load that is close or corresponds to the nominal one. If this load is maintained constantly, excess heat energy is produced. This excess may be used to generate electric energy in a steam power unit with a turboexpander. A way to insert this unit into the flow diagram of a boiler plant is proposed. The results of analysis of turbine types (turboexpanders included) with various capacities are presented, and the optimum type for the proposed flow diagram is chosen. The methodology for the design of turboexpanders and compressors used in the oil and gas industry and their operational data were applied in the analysis of a turboexpander. The results of the thermogasdynamic analysis of a turboexpander and the engineered shape of an axial-radial impeller are presented. Halocarbon R245fa is chosen as the working medium based on its calorimetric properties.
About the authors
R. A. Sadykov
Kazan State University of Architecture and Engineering
Author for correspondence.
Email: solil1@yandex.ru
Russian Federation, ul. Zelenaya 1, Kazan, 420043
A. Z. Daminov
Kazan Scientific Center, Russian Academy of Sciences
Email: solil1@yandex.ru
Russian Federation, ul. Lobachevskogo 2/31, Kazan, 420111
I. N. Solomin
OAO Kazenergo
Email: solil1@yandex.ru
Russian Federation, ul. G. Tukaya 162, Kazan, 420021
V. A. Futin
ZAO NIIturbokompressor
Email: solil1@yandex.ru
Russian Federation, Sibirskii trakt 40, Kazan, 420029