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Title: Modeling Hybrid Nuclear Systems With Chilled-Water Storage

Air-conditioning loads during the warmer months of the year are large contributors to an increase in the daily peak electrical demand. Traditionally, utility companies boost output to meet daily cooling load spikes, often using expensive and polluting fossil fuel plants to match the demand. Likewise, heating, ventilation, and air conditioning (HVAC) system components must be sized to meet these peak cooling loads. However, the use of a properly sized stratified chilled-water storage system in conjunction with conventional HVAC system components can shift daily energy peaks from cooling loads to off-peak hours. This process is examined in light of the recent development of small modular nuclear reactors (SMRs). In this paper, primary components of an air-conditioning system with a stratified chilled-water storage tank were modeled in FORTRAN 95. A basic chiller operation criterion was employed. Simulation results confirmed earlier work that the air-conditioning system with thermal energy storage (TES) capabilities not only reduced daily peaks in energy demand due to facility cooling loads but also shifted the energy demand from on-peak to off-peak hours, thereby creating a more flattened total electricity demand profile. Thus, coupling chilled-water storage-supplemented HVAC systems to SMRs is appealing because of the decrease in necessary reactor powermore » cycling, and subsequently reduced associated thermal stresses in reactor system materials, to meet daily fluctuations in cooling demand. Finally and also, such a system can be used as a thermal sink during reactor transients or a buffer due to renewable intermittency in a nuclear hybrid energy system (NHES).« less
Authors:
 [1] ;  [1]
  1. North Carolina State Univ., Raleigh, NC (United States)
Publication Date:
Report Number(s):
INL/JOU-15-37012
Journal ID: ISSN 0195-0738
Grant/Contract Number:
AC07-05ID14517
Type:
Accepted Manuscript
Journal Name:
Journal of Energy Resources Technology
Additional Journal Information:
Journal Volume: 139; Journal Issue: 1; Journal ID: ISSN 0195-0738
Publisher:
ASME
Research Org:
Idaho National Lab. (INL), Idaho Falls, ID (United States); North Carolina State Univ., Raleigh, NC (United States)
Sponsoring Org:
USDOE; INL Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; hybrid nuclear energy system; load shifting; small modular nuclear reactor; stratified chilled-water storage; thermal energy storage
OSTI Identifier:
1367861

Misenheimer, Corey T., and Terry, Stephen D.. Modeling Hybrid Nuclear Systems With Chilled-Water Storage. United States: N. p., Web. doi:10.1115/1.4033858.
Misenheimer, Corey T., & Terry, Stephen D.. Modeling Hybrid Nuclear Systems With Chilled-Water Storage. United States. doi:10.1115/1.4033858.
Misenheimer, Corey T., and Terry, Stephen D.. 2016. "Modeling Hybrid Nuclear Systems With Chilled-Water Storage". United States. doi:10.1115/1.4033858. https://www.osti.gov/servlets/purl/1367861.
@article{osti_1367861,
title = {Modeling Hybrid Nuclear Systems With Chilled-Water Storage},
author = {Misenheimer, Corey T. and Terry, Stephen D.},
abstractNote = {Air-conditioning loads during the warmer months of the year are large contributors to an increase in the daily peak electrical demand. Traditionally, utility companies boost output to meet daily cooling load spikes, often using expensive and polluting fossil fuel plants to match the demand. Likewise, heating, ventilation, and air conditioning (HVAC) system components must be sized to meet these peak cooling loads. However, the use of a properly sized stratified chilled-water storage system in conjunction with conventional HVAC system components can shift daily energy peaks from cooling loads to off-peak hours. This process is examined in light of the recent development of small modular nuclear reactors (SMRs). In this paper, primary components of an air-conditioning system with a stratified chilled-water storage tank were modeled in FORTRAN 95. A basic chiller operation criterion was employed. Simulation results confirmed earlier work that the air-conditioning system with thermal energy storage (TES) capabilities not only reduced daily peaks in energy demand due to facility cooling loads but also shifted the energy demand from on-peak to off-peak hours, thereby creating a more flattened total electricity demand profile. Thus, coupling chilled-water storage-supplemented HVAC systems to SMRs is appealing because of the decrease in necessary reactor power cycling, and subsequently reduced associated thermal stresses in reactor system materials, to meet daily fluctuations in cooling demand. Finally and also, such a system can be used as a thermal sink during reactor transients or a buffer due to renewable intermittency in a nuclear hybrid energy system (NHES).},
doi = {10.1115/1.4033858},
journal = {Journal of Energy Resources Technology},
number = 1,
volume = 139,
place = {United States},
year = {2016},
month = {6}
}