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Evaluation of phase change thermal storage in a cascade heat pump

Journal Article · · Applied Energy
 [1];  [2];  [1];  [1];  [1]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. National Renewable Energy Laboratory (NREL), Golden, CO (United States); University of Wisconsin, Madison, WI (United States)
Here this study proposes a low-global warming potential cascade heat pump system with integrated phase change material (PCM) for combined space heating and cooling. PCM is embedded in the intermediate heat exchanger that couples an outdoor R290 refrigerant circuit and an indoor CO2 circuit. We used a clustering method to develop seasonally representative load and ambient temperature profiles for residential buildings in Minneapolis, Minnesota. We simulated the system peak shaving performance on the selected representative days, assuming three different PCM options including ice (0 °C), tetradecane (5.6 °C), and a commercially available PCM, SP9 (10.5 °C). The baseline was the same cascade system without thermal storage. We investigated the effect of both thermal energy storage capacity (kWhth) and PCM transition temperature on system performance. The results show that higher thermal energy storage capacity shaves more electric energy until it reaches a maximum value set by the load characteristics of the building. SP9, with the highest transition temperature, shaves the most electric energy, while ice shaves the least. Moreover, ice has the highest charging cost, especially in the cooling season when the outdoor circuit has to operate at an evaporating temperature lower than 0 °C to make ice. Our results show that SP9 presents the lowest levelized cost of storage, closely followed by ice. A lower off-peak electricity rate benefits ice more than SP9 or tetradecane because ice has the largest charging cost penalty.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
2311885
Report Number(s):
NREL/JA--5500-86189; MainId:86962; UUID:6f51406a-510d-4a4e-a438-55a7ad2e5bbe; MainAdminId:71927
Journal Information:
Applied Energy, Journal Name: Applied Energy Vol. 359; ISSN 0306-2619
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (32)

Design and Optimization of Lamellar Phase Change Composites for Thermal Energy Storage journal November 2020
A general correlation for heat transfer during film condensation inside pipes journal April 1979
Heat transfer and friction characteristics of plain fin-and-tube heat exchangers, part II: Correlation journal August 2000
Clustering analysis of residential electricity demand profiles journal December 2014
Thermal energy storage using phase change materials: Techno-economic evaluation of a cold storage installation in an office building journal October 2020
Design and performance evaluation of a dual-circuit thermal energy storage module for air conditioners journal June 2021
Experimental demonstration of an air-source heat pump application using an integrated phase change material storage as a desuperheater for domestic hot water generation journal January 2022
Experimental investigation on thermal characteristics of transcritical CO2 heat pump unit combined with thermal energy storage for residential heating journal January 2020
Comparison of approximation-assisted heat exchanger models for steady-state simulation of vapor compression system journal February 2020
Performance study of phase change charging/discharging processes of condensing heat storage in cold regions based on a mathematical model journal January 2021
A tripartite graph based methodology for steady-state solution of generalized multi-mode vapor compression systems journal February 2021
Techno-economic analysis of air source heat pump combined with latent thermal energy storage applied for space heating in China journal February 2021
Numerical modeling of latent heat thermal energy storage integrated with heat pump for domestic hot water production journal September 2022
Review on heat pump (HP) coupled with phase change material (PCM) for thermal energy storage journal January 2023
A review of data mining technologies in building energy systems: Load prediction, pattern identification, fault detection and diagnosis journal April 2020
Performance of heat pump integrated phase change material thermal storage for electric load shifting in building demand side management journal May 2019
Latent heat storage integration into heat pump based heating systems for energy-efficient load shifting journal May 2021
Reduced-order modeling method for phase-change thermal energy storage heat exchangers journal July 2022
Performance investigation on an air source heat pump system with latent heat thermal energy storage journal January 2022
Experimental study on the condensing heat recovery performance of air source heat pump journal December 2020
Performance analysis and transient simulation of a vapor compression cooling system integrated with phase change material as thermal energy storage for electric peak load shaving journal March 2021
Review on compression heat pump systems with thermal energy storage for heating and cooling of buildings journal July 2021
Universal approach to predicting heat transfer coefficient for condensing mini/micro-channel flow journal January 2013
Universal approach to predicting saturated flow boiling heat transfer in mini/micro-channels – Part II. Two-phase heat transfer coefficient journal September 2013
Potential energy benefits of integrated refrigeration system with microturbine and absorption chiller journal December 2004
Experimental investigation of a novel thermal energy storage unit in the heat pump system journal August 2021
Finned-tube-integrated modular thermal storage systems for HVAC load modulation in buildings journal December 2023
Rate capability and Ragone plots for phase change thermal energy storage journal February 2021
Addressing energy storage needs at lower cost via on-site thermal energy storage in buildings journal January 2021
Temperature clusters in commercial buildings using k-means and time series clustering journal February 2022
Performance Study of Direct Integration of Phase Change Material into an Innovative Evaporator of a Simple Vapour Compression System journal July 2020
Techno-Economic Analysis of a Heat Pump Cycle Including a Three-Media Refrigerant/Phase Change Material/Water Heat Exchanger in the Hot Superheated Section for Efficient Domestic Hot Water Generation journal November 2020