THERMAL SCIENCE

International Scientific Journal

Jiaqing Zhang

,

Wei Zhang

,

Xinli Lu

,

Yu Ren

,

Dawei Guo

IMPROVEMENT RESEARCH OF CONDENSING EQUIPMENT IN ORGANIC RANKINE CYCLE POWER GENERATION SYSTEMS

ABSTRACT
Dry hot rock power generation is an important part of geothermal energy application, and condenser has become an important part of the system because it can provide a lower outlet back pressure for steam turbine, and improve the power generation of the system. Engineering equation solver is applied to assess the performance of cooling towers for ORC power generation systems. In the present study, two models with different cooling towers are considered. In the first model, the predicted performance of the opening cooling tower for ORC systems is studied and compared with the experimental measurement for a 500 kW system and in the second model, because of the high mass-flow of the cooling water and high energy consumption of the cooling water pump for the opening cooling tower, the predicted performance of the closed wet cooling tower to replace the opening cooling tower for ORC systems is studied. The models are capable of predicting the variation of evaporation and condensation temperatures, the pressure loss of heat ex-changers. The R123, R227ea, R245fa, R600, and R600a are tested as working flu-ids. The results show that the second model reduces the energy consumption of the cooling water pump, and it also improves the net power generation and net generation efficiency for using R227ea, R600, and R600a. However, with the increase of the closed wet cooling tower pressure loss, both the net power generation and net generation efficiency decrease. Therefore, different working fluids are suitable for different pressure loss.
KEYWORDS
organic Rankine cycle, closed wet cooling tower, pressure drop, net power generation, net generation efficiency
PAPER SUBMITTED: 2019-01-25
PAPER REVISED: 2019-07-19
PAPER ACCEPTED: 2019-09-16
PUBLISHED ONLINE: 2019-10-06
DOI REFERENCE: https://doi.org/10.2298/TSCI190125379Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 1, PAGES [491 - 501]
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Improvement research of condensing equipment in organic Rankine cycle power generation systems

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence