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Title: Integrated supermarket refrigeration for very high ambient temperature

Abstract

This paper analytically investigates and compares the performance of a proposed ‘all-natural’ NH 3/CO 2 cascaded booster system to a conventional R404A direct expansion system as well as to an ‘all-CO 2’ system with multi-ejector unit and flooded evaporator. Performance comparison is made based on the annual combined COP and Life Cycle Climate Performance (LCCP) for operation in selected cities of Middle East and India. Our results show that in extreme warm climate, the energy efficiency of the proposed configuration exceeds that of all-CO 2 configuration by a maximum of about 12.23% and the total emissions are lower by up to 11.20%. However, the all-CO 2 multi ejector system performs better in cold and mild warm climate. In the NH 3/CO 2 cascade, the high temperature NH 3 system can be designed to be isolated from the accessible locations of the supermarket. Here, the work presented is expected to help adoption of natural refrigerants such as CO 2 and NH 3 for commercial application in extreme warm climate conditions prevailing in many cities of Middle East and India.

Authors:
 [1]; ORCiD logo [2];  [3]; ORCiD logo [2]; ORCiD logo [4];  [1]
  1. BITS Pilani, Rajasthan (India)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Royal Institute of Technology (KTH), Stockholm (Sweden)
  4. Jaume l Univ., Castellon (Spain)
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:
1494002
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Energy (Oxford)
Additional Journal Information:
Journal Name: Energy (Oxford); Journal Volume: 165; Journal Issue: PA; Journal ID: ISSN 0360-5442
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
29 ENERGY PLANNING, POLICY, AND ECONOMY; CO2; NH3/CO2 cascade; Supermarket; Integrated; Natural; Warm climate

Citation Formats

Purohit, Nilesh, Sharma, Vishaldeep, Sawalha, Samer, Fricke, Brian A., Llopis, Rodrigo, and Dasgupta, Mani Sankar. Integrated supermarket refrigeration for very high ambient temperature. United States: N. p., 2018. Web. doi:10.1016/j.energy.2018.09.097.
Purohit, Nilesh, Sharma, Vishaldeep, Sawalha, Samer, Fricke, Brian A., Llopis, Rodrigo, & Dasgupta, Mani Sankar. Integrated supermarket refrigeration for very high ambient temperature. United States. doi:10.1016/j.energy.2018.09.097.
Purohit, Nilesh, Sharma, Vishaldeep, Sawalha, Samer, Fricke, Brian A., Llopis, Rodrigo, and Dasgupta, Mani Sankar. Sun . "Integrated supermarket refrigeration for very high ambient temperature". United States. doi:10.1016/j.energy.2018.09.097. https://www.osti.gov/servlets/purl/1494002.
@article{osti_1494002,
title = {Integrated supermarket refrigeration for very high ambient temperature},
author = {Purohit, Nilesh and Sharma, Vishaldeep and Sawalha, Samer and Fricke, Brian A. and Llopis, Rodrigo and Dasgupta, Mani Sankar},
abstractNote = {This paper analytically investigates and compares the performance of a proposed ‘all-natural’ NH3/CO2 cascaded booster system to a conventional R404A direct expansion system as well as to an ‘all-CO2’ system with multi-ejector unit and flooded evaporator. Performance comparison is made based on the annual combined COP and Life Cycle Climate Performance (LCCP) for operation in selected cities of Middle East and India. Our results show that in extreme warm climate, the energy efficiency of the proposed configuration exceeds that of all-CO2 configuration by a maximum of about 12.23% and the total emissions are lower by up to 11.20%. However, the all-CO2 multi ejector system performs better in cold and mild warm climate. In the NH3/CO2 cascade, the high temperature NH3 system can be designed to be isolated from the accessible locations of the supermarket. Here, the work presented is expected to help adoption of natural refrigerants such as CO2 and NH3 for commercial application in extreme warm climate conditions prevailing in many cities of Middle East and India.},
doi = {10.1016/j.energy.2018.09.097},
journal = {Energy (Oxford)},
number = PA,
volume = 165,
place = {United States},
year = {2018},
month = {9}
}

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