Parametric studies and structural optimization of a PCM tank integrated with CO2 heat pumps

IF 9 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy Pub Date : 2024-11-16 DOI:10.1016/j.renene.2024.121928

Yantong Li, Chang Liu, Junhan Liang, Huibin Yin

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引用次数: 0

Abstract

Current studies mainly focus on parametric studies and structural optimization of PCM tank in component level, and parametric studies and structural optimization of PCM tank integrated with heat sources in system level are seldomly performed. Therefore, this study presents methods for parametric studies and structural optimization of PCM tank integrated with heat sources. Charging time, stored energy, total electricity use, and system coefficient of performance are considered as performance indicators, and water fraction, tube length, and outer diameter are considered as decision variables in the method for parametric studies. Central composite design method is applied to develop surrogate models, and genetic algorithm is applied to maximize system coefficient of performance or minimize total electricity use in the method for structural optimization. A PCM tank integrated with both water-source and air-source CO₂ heat pumps is considered as a case study for illustrating the methodology. It could be found that when the water fraction increased from 0.4 to 0.8, the system coefficient of performance for the system with water-source and air-source CO₂ heat pumps was increased by 12.2 % and 6.6 %, respectively. Thus, this study provides a guideline for parametric studies and structural optimization of PCM tank integrated with heat sources.

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与二氧化碳热泵集成的 PCM 储罐的参数研究和结构优化

目前的研究主要集中在部件级 PCM 储罐的参数研究和结构优化，而系统级 PCM 储罐与热源集成的参数研究和结构优化则很少进行。因此，本研究介绍了与热源集成的 PCM 罐的参数研究和结构优化方法。在参数研究方法中，充电时间、存储能量、总用电量和系统性能系数被视为性能指标，而水分量、管子长度和外径被视为决策变量。在结构优化方法中，采用中心复合设计法建立代用模型，并采用遗传算法使系统性能系数最大化或总用电量最小化。以一个同时集成了水源和空气源 CO2 热泵的 PCM 水箱为例，对该方法进行了说明。研究发现，当水的比例从 0.4 增加到 0.8 时，水源和空气源 CO2 热泵系统的系统性能系数分别提高了 12.2% 和 6.6%。因此，本研究为与热源集成的 PCM 水箱的参数研究和结构优化提供了指导。

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来源期刊

Renewable Energy 工程技术-能源与燃料

CiteScore

18.40

自引率

9.20%

发文量

1955

审稿时长

6.6 months

期刊介绍： Renewable Energy journal is dedicated to advancing knowledge and disseminating insights on various topics and technologies within renewable energy systems and components. Our mission is to support researchers, engineers, economists, manufacturers, NGOs, associations, and societies in staying updated on new developments in their respective fields and applying alternative energy solutions to current practices. As an international, multidisciplinary journal in renewable energy engineering and research, we strive to be a premier peer-reviewed platform and a trusted source of original research and reviews in the field of renewable energy. Join us in our endeavor to drive innovation and progress in sustainable energy solutions.