skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

This content will become publicly available on February 10, 2020

Title: Experimental evaluation of a semi-open membrane-based absorption heat pump system utilizing ionic liquids

Abstract

While the use of energy efficient absorption heat pumps has been typically limited to the high capacity commercial and industrial applications, the use of a semi-open absorption heat pump for water heating has been demonstrated to be an energy efficient alternative for residential scale applications. A semi-open absorption system uses ambient water vapor as the refrigerant in the absorber where its heat of phase change is transferred to the process water, cooling the solution in the absorber. The solution is pumped to the desorber, where by adding heat, the water vapor is released from the solution and condensed in the condenser. The heat of phase change of water vapor is transferred to process water again in the condenser. This cycle when implemented with a membrane-based absorber in a plate and frame form of heat exchanger using ionic liquids can overcome the challenges related to the system architecture of conventional absorption heat pumps like the lower efficiency at small scale, crystallization/corrosion issues with the desiccants and the high cost of hermetically sealed components. The cycle COP for such a system was previously demonstrated by Chugh et al. for high humidity conditions. In this experimental study, design improvements were made that expandmore » the system’s applicability to more practical and standardized test conditions. With these improvements, the performance of the system was evaluated. The results presented in this study demonstrate the improved system’s viability as a heat pump water heater conforming to standard water heater test conditions. Performance was measured at a cycle thermal COP of 1.2 with a hot water delivery water temperature of 56 °C and ambient air at 19 °C and 49% RH.« less

Authors:
 [1];  [2]; ORCiD logo [2];  [1];  [1];  [1];  [1];  [2];  [1]
  1. Univ. of Florida, Gainesville, FL (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1502523
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Applied Energy
Additional Journal Information:
Journal Volume: 239; Journal Issue: C; Journal ID: ISSN 0306-2619
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Chugh, Devesh, Gluesenkamp, Kyle R., Abu-Heiba, Ahmad, Alipanah, Morteza, Fazeli, Abdy, Rode, Richard, Schmid, Michael, Patel, Viral K., and Moghaddam, Saeed. Experimental evaluation of a semi-open membrane-based absorption heat pump system utilizing ionic liquids. United States: N. p., 2019. Web. doi:10.1016/j.apenergy.2019.01.251.
Chugh, Devesh, Gluesenkamp, Kyle R., Abu-Heiba, Ahmad, Alipanah, Morteza, Fazeli, Abdy, Rode, Richard, Schmid, Michael, Patel, Viral K., & Moghaddam, Saeed. Experimental evaluation of a semi-open membrane-based absorption heat pump system utilizing ionic liquids. United States. doi:10.1016/j.apenergy.2019.01.251.
Chugh, Devesh, Gluesenkamp, Kyle R., Abu-Heiba, Ahmad, Alipanah, Morteza, Fazeli, Abdy, Rode, Richard, Schmid, Michael, Patel, Viral K., and Moghaddam, Saeed. Sun . "Experimental evaluation of a semi-open membrane-based absorption heat pump system utilizing ionic liquids". United States. doi:10.1016/j.apenergy.2019.01.251.
@article{osti_1502523,
title = {Experimental evaluation of a semi-open membrane-based absorption heat pump system utilizing ionic liquids},
author = {Chugh, Devesh and Gluesenkamp, Kyle R. and Abu-Heiba, Ahmad and Alipanah, Morteza and Fazeli, Abdy and Rode, Richard and Schmid, Michael and Patel, Viral K. and Moghaddam, Saeed},
abstractNote = {While the use of energy efficient absorption heat pumps has been typically limited to the high capacity commercial and industrial applications, the use of a semi-open absorption heat pump for water heating has been demonstrated to be an energy efficient alternative for residential scale applications. A semi-open absorption system uses ambient water vapor as the refrigerant in the absorber where its heat of phase change is transferred to the process water, cooling the solution in the absorber. The solution is pumped to the desorber, where by adding heat, the water vapor is released from the solution and condensed in the condenser. The heat of phase change of water vapor is transferred to process water again in the condenser. This cycle when implemented with a membrane-based absorber in a plate and frame form of heat exchanger using ionic liquids can overcome the challenges related to the system architecture of conventional absorption heat pumps like the lower efficiency at small scale, crystallization/corrosion issues with the desiccants and the high cost of hermetically sealed components. The cycle COP for such a system was previously demonstrated by Chugh et al. for high humidity conditions. In this experimental study, design improvements were made that expand the system’s applicability to more practical and standardized test conditions. With these improvements, the performance of the system was evaluated. The results presented in this study demonstrate the improved system’s viability as a heat pump water heater conforming to standard water heater test conditions. Performance was measured at a cycle thermal COP of 1.2 with a hot water delivery water temperature of 56 °C and ambient air at 19 °C and 49% RH.},
doi = {10.1016/j.apenergy.2019.01.251},
journal = {Applied Energy},
number = C,
volume = 239,
place = {United States},
year = {2019},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on February 10, 2020
Publisher's Version of Record

Save / Share: