Demonstration of a solar combi-system utilizing stable supercooling of sodium acetate trihydrate for heat storage

Englmair, Gerald; Kong, Weiqiang; Berg, Jakob Brinkø; Furbo, Simon; Fan, Jianhua

doi:10.1016/j.applthermaleng.2019.114647

Cited by 29 publications

(14 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The raw materials for the PCM unit subsystem were obtained from LHTES system studies [10,11,32]. According to these studies, four separate modules of 150 L each, composed the PCM storage unit.…”

Section: Raw Materialsmentioning

confidence: 99%

Environmental Assessment of Latent Heat Thermal Energy Storage Technology System with Phase Change Material for Domestic Heating Applications

Bernal¹,

Muñoz²,

Manente³

et al. 2021

Sustainability

View full text Add to dashboard Cite

The emissions generated by the space and water heating of UK homes need to be reduced to meet the goal of becoming carbon neutral by 2050. The combination of solar (S) collectors with latent heat thermal energy storage (LHTES) technologies with phase change materials (PCM) can potentially help to achieve this goal. However, there is limited understanding of the environmental sustainability of LHTES technologies from a full life cycle perspective. This study assesses for the first time 18 environmental impacts of a full S-LHTES-PCM system from a cradle to grave perspective and compares the results with the most common sources of heat in UK homes. The results show that the system’s main environmental hotspots are the solar collector, the PCM, the PCM tank, and the heat exchanger. The main cause of most of the impacts is the extensive consumption of electricity and heat during the production of raw materials for these components. The comparison with other sources of household heat (biomass, heat pump, and natural gas) indicates that the S-LHTES-PCM system generates the highest environmental impact in 11 of 18 categories. However, a sensitivity analysis based on the lifetime of the S-LHTES-PCM systems shows that, when the lifetime increases to 40 years, almost all the impacts are significantly reduced. In fact, a 40-year S-LHTES-PCM system has a lower global warming potential than natural gas.

show abstract

Section: Raw Materialsmentioning

confidence: 99%

Environmental Assessment of Latent Heat Thermal Energy Storage Technology System with Phase Change Material for Domestic Heating Applications

Bernal¹,

Muñoz²,

Manente³

et al. 2021

Sustainability

View full text Add to dashboard Cite

show abstract

“…The result is a thermal energy storage capacity that can be used on demand by the controlled initialization of crystallization. This storage concept has been demonstrated for a solar heating system [12,13] and showed potential for compact thermal energy storage systems in buildings [14]. Recently, Duquesne et al reported Xylitol [15] and Puupponen et al reported micro-structured polyol-polystyrene composites [16] as further promising materials with stable supercooling properties.…”

Section: Introductionmentioning

confidence: 99%

Experimental Devices to Investigate the Long-Term Stability of Phase Change Materials under Application Conditions

et al. 2020

Self Cite

View full text Add to dashboard Cite

An important prerequisite to select a reliable phase change material (PCM) for thermal energy storage applications is to test it under application conditions. In the case of solid–liquid PCM, a large amount of thermal energy can be stored and released in a small temperature range around the solid–liquid phase transition. Therefore, to test the long-term stability of solid–liquid PCM, they are subjected to melting and solidification processes taking into account the conditions of the intended application. In this work, 18 experimental devices to investigate the long-term stability of PCM are presented. The experiments can be divided into thermal cycling stability tests, tests on PCM with stable supercooling, and tests on the stability of phase change slurries (PCS). In addition to these experiments, appropriate methods to investigate a possible degradation of the PCM are introduced. Considering the diversity of the investigated devices and the wide range of experimental parameters, further work toward a standardization of PCM stability testing is recommended.

show abstract

“…G. Englmair et al in [21] described a heat-storage prototype consisting of a 735 L water tank and four PCM units, each containing 200 kg of sodium acetate trihydrate composite. The solar installation with accumulation is used for the space heating and hot water demand patterns of a standard-size Passive House in the Danish climate.…”

Section: Introductionmentioning

confidence: 99%

“…Energies 2020, 13, 3877 3 of 24 this university described, in an article written by M. Jokiel et al [20], the operation of PCM cold storage tanks, which successfully reduce the required three ammonia chiller capacity. G. Englmair et al in [21] described a heat-storage prototype consisting of a 735 L water tank and four PCM units, each containing 200 kg of sodium acetate trihydrate composite. The solar installation with accumulation is used for the space heating and hot water demand patterns of a standard-size Passive House in the Danish climate.…”

Section: Introductionmentioning

confidence: 99%

Development and Results from Application of PCM-Based Storage Tanks in a Solar Thermal Comfort System of an Institutional Building—A Case Study

et al. 2020

View full text Add to dashboard Cite

An important element of a solar installation is the storage tank. When properly selected and operated, it can bring numerous benefits. The presented research relates to a project that is implemented at the Solar Energy Research Center of the University of Almeria in Spain. In order to improve the operation of the solar cooling and heating system of the Center, it was upgraded with two newly designed storage tanks filled with phase change materials (PCM). As a result of design works, commercial material S10 was selected for the accumulation of cold, and S46 for the accumulation of heat, in an amount of 85% and 15%, respectively. The article presents in detail the process of selecting the PCM material, designing the installation, experimental research, and exergy analysis. Individual tasks were carried out by research groups cooperating under the PCMSOL EUROPEAN PROJECT. Results of tests conducted on the constructed installation indicate that daily energy saving when using a solar chiller with PCM tanks amounts to 40% during the cooling season.

show abstract

Demonstration of a solar combi-system utilizing stable supercooling of sodium acetate trihydrate for heat storage

Cited by 29 publications

References 39 publications

Environmental Assessment of Latent Heat Thermal Energy Storage Technology System with Phase Change Material for Domestic Heating Applications

Environmental Assessment of Latent Heat Thermal Energy Storage Technology System with Phase Change Material for Domestic Heating Applications

Experimental Devices to Investigate the Long-Term Stability of Phase Change Materials under Application Conditions

Development and Results from Application of PCM-Based Storage Tanks in a Solar Thermal Comfort System of an Institutional Building—A Case Study

Contact Info

Product

Resources

About