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Title: Effects of Cold Temperature and Main Compressor Intercooling on Recuperator and Recompression Cycle Performance - Presentation

Abstract

This study investigates the effects of cold supercritical CO2 (sCO2) temperatures, compressor inlet pressures, and main compressor intercooling on the efficiency and specific power of recompression sCO2 cycles. Reducing the cold sCO2 temperature increases the compressor inlet density, thus reducing required compression power and increasing cycle thermal efficiency. Similarly, main compressor intercooling improves the specific power of a recompression cycle, reducing sCO2 mass flow, cycle size and cost for a given power output, though it is also shown to lead to an internal pinch point in the low temperature recuperator. Strategies for remediation of internal pinch points for recuperators as well as for the main CO2 cooler and the flue gas cooler are discussed, and apply to recompression cycles for all sCO2 applications. Upfront consideration of these remediation strategies is essential to determine attainable sCO2 cycle operating conditions and component sizing requirements.

Authors:
 [1];  [2];  [2]
  1. NETL
  2. KeyLogic
Publication Date:
Research Org.:
NETL
Sponsoring Org.:
FE-22
OSTI Identifier:
1491118
Report Number(s):
NETL-PUB-21593
DOE Contract Number:  
DE-FE0025912
Resource Type:
Conference
Resource Relation:
Conference: 2nd European Supercritical CO2 Conference Essen; Germany 8/30/2018 - 8/31/2018
Country of Publication:
United States
Language:
English
Subject:
supercritical CO2 (sCO2); indirect sCO2; recompression cycle; recuperators; CO2 compression; dry cooling

Citation Formats

Weiland, Nathan, White, Charles W., and O'Connell, Andrew C. Effects of Cold Temperature and Main Compressor Intercooling on Recuperator and Recompression Cycle Performance - Presentation. United States: N. p., 2018. Web.
Weiland, Nathan, White, Charles W., & O'Connell, Andrew C. Effects of Cold Temperature and Main Compressor Intercooling on Recuperator and Recompression Cycle Performance - Presentation. United States.
Weiland, Nathan, White, Charles W., and O'Connell, Andrew C. Fri . "Effects of Cold Temperature and Main Compressor Intercooling on Recuperator and Recompression Cycle Performance - Presentation". United States. https://www.osti.gov/servlets/purl/1491118.
@article{osti_1491118,
title = {Effects of Cold Temperature and Main Compressor Intercooling on Recuperator and Recompression Cycle Performance - Presentation},
author = {Weiland, Nathan and White, Charles W. and O'Connell, Andrew C.},
abstractNote = {This study investigates the effects of cold supercritical CO2 (sCO2) temperatures, compressor inlet pressures, and main compressor intercooling on the efficiency and specific power of recompression sCO2 cycles. Reducing the cold sCO2 temperature increases the compressor inlet density, thus reducing required compression power and increasing cycle thermal efficiency. Similarly, main compressor intercooling improves the specific power of a recompression cycle, reducing sCO2 mass flow, cycle size and cost for a given power output, though it is also shown to lead to an internal pinch point in the low temperature recuperator. Strategies for remediation of internal pinch points for recuperators as well as for the main CO2 cooler and the flue gas cooler are discussed, and apply to recompression cycles for all sCO2 applications. Upfront consideration of these remediation strategies is essential to determine attainable sCO2 cycle operating conditions and component sizing requirements.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}

Conference:
Other availability
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