Application of a ground source heat pump system with PCM‐embedded radiant wall heating for buildings

Oruç, Onur; Dinçer, İbrahim; Javanı, Nader

doi:10.1002/er.4791

Cited by 23 publications

(19 citation statements)

References 18 publications

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“…Furthermore, the constant temperature of phase change improved the BHE extraction rate. Another work ( [31]) presented the exergy analysis of a hybrid GSHP system, coupled with solar panels, and indoor air conditioning was possible because of radiant panels with encapsulated PCM. The results showed that PCM was beneficial in term of first and second law efficiency; it increased with density and melting temperature.…”

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confidence: 99%

Environmental Performance of Innovative Ground-Source Heat Pumps with PCM Energy Storage

Bonamente

Aquino

2019

Energies

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Space conditioning is responsible for the majority of carbon dioxide emission and fossil fuel consumption during a building’s life cycle. The exploitation of renewable energy sources, together with efficiency enhancement, is the most promising solution. An innovative layout for ground-source heat pumps, featuring upstream thermal energy storage (uTES), was already proposed and proved to be as effective as conventional systems while requiring lower impact geothermal installations thanks to its ability to decouple ground and heat-pump energy fluxes. This work presents further improvements to the layout, obtained using more compact and efficient thermal energy storage containing phase-change materials (PCMs). The switch from sensible- to latent-heat storage has the twofold benefit of dramatically reducing the volume of storage (by a factor of approximately 10) and increasing the coefficient of performance of the heat pump. During the daily cycle, the PCMs are continuously melted/solidified, however, the average storage temperature remains approximately constant, allowing the heat pump to operate closer to its maximum efficiency. A life cycle assessment (LCA) was performed to study the environmental benefits of introducing PCM-uTES during the entire life cycle of the system in a comparative approach.

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confidence: 99%

Environmental Performance of Innovative Ground-Source Heat Pumps with PCM Energy Storage

Bonamente

Aquino

2019

Energies

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“…The building thermal comfort can be improved by passive and active or sometimes hybrid solar designs . Moreover, outdoor temperature changes and daily solar energy can be retrieved using passive solar grids including thermal energy storage (TES) setups . In this regard, compared with sensible heat‐based systems, the popularity of latent heat‐based TES frameworks working by phase change materials (PCMs) is increased day by day because they allow higher heat storage per volume and also provide better management to the released heat …”

Section: Introductionmentioning

confidence: 99%

“…2,3 Moreover, outdoor temperature changes and daily solar energy can be retrieved using passive solar grids including thermal energy storage (TES) setups. 4,5 In this regard, compared with sensible heat-based systems, the popularity of latent heat-based TES frameworks working by phase change materials (PCMs) is increased day by day because they allow higher heat storage per volume and also provide better management to the released heat. [6][7][8][9] Many solid-liquid PCMs (S-LPCMs) include organic and inorganic or their binary/ternary which have been used in various TES purposes such as thermal regulation of buildings, thermal management of foods, storing of waste heat, and cooling of electronic systems and photovoltaic panels.…”

Section: Introductionmentioning

confidence: 99%

Thermal energy storage properties of polyethylene glycol grafted styrenic copolymer as novel solid‐solid phase change materials

2020

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Summary Polymeric solid‐solid phase change materials (S‐SPCMs) are functional materials with phase transition‐heat storing/releasing ability. With this respect, a series of polyethylene glycol (PEG) grafted styrenic copolymer were produced as novel S‐SPCMs. PEGs with three different molecular weights were used for synthesis of isocyanate‐terminated polymers (ITPs). To achieve cross‐linking S‐SPCMs, the ITPs were grafted with styrene‐co‐ally alcohol) (PSAA) at three different PSAA:PEG mole ratios. The produced polymers were characterized using Fourier transform infrared (FT‐IR), proton nuclear magnetic resonance (1H NMR), and X‐ray diffraction (XRD) technique. The crystalline‐amorphous phase transitions of the polymers were examined using polarized optical microscopy (POM). The FT‐IR, NMR, and XRD results confirmed the expected chemical structures and crystallization performances of the polymers. Thermal energy storage (TES) properties of the S‐SPCMs were determined by differential scanning calorimetry (DSC). The DSC results revealed that the polymers with grafting ratio of PSAA:PEG(1:1) had phase transition enthalpies between about 74 and 142 J/g and phase transition temperatures between about 26°C and 57°C. Thermogravimetric analysis (TGA) measurements demonstrated that the S‐SPCMs were resistant to thermal decomposition until about 300°C. Thermal conductivities of the produced S‐SPCMs were measured in a range of about 0.18 to 0.19 W/mK. Furthermore, TES properties of the S‐SPCMs were slightly changed as their chemical structures were remained after 5000 thermal cycles. By overall evaluation of the findings, it can be foreseen that particularly PSAA‐g‐PEG(1:1) polymers can be considered as promising S‐SPCMs for some TES practices such as air conditioning of buildings, thermoregulation of food packages, automobile components, electronic devices, and solar photovoltaic panels.

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“…3 Thermal energy storage (TES) method using with phase change materials (PCMs) has been growing interest due to decreasing heating, ventilation, and air conditioning times while it saves energy and reduces fossil fuel consumption and as well as pollutant emissions. [13][14][15] PCMs are capable materials for absorbing and releasing large amounts of thermal energy in latent heat form via phase-changing process. PCMs offer improving the energy efficiency in building and reducing the fossil sourcedenergy consumption.…”

Section: Introductionmentioning

confidence: 99%

Phase change material impregnated wood for passive thermal management of timber buildings

et al. 2020

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The Scots pine (Pinus sylvestris L.) sapwood was impregnated with the eutectic mixture of capric acid (CA) and stearic acid (SA) as phase change material (PCM) via vacuum process for passive thermoregulation in timber buildings. The hygroscopic properties, mechanical properties, thermal energy storage (TES) characteristics and lab-scale thermo-regulative performance of wood/ CA-SA composite were evaluated. The produced composite from PCM was morphologically and physico-chemically characterized by SEM, FT-IR and XRD analysis. Thermal energy storage (TES) properties, cycling chemical/thermal reliability, and thermal degradation stability of the produced composite were determined by TG/DTA and DSC analysis. The hygroscopic tests revealed that the wood/CA-SA composite showed low water absorption (WA) and high anti-swelling efficiency (ASE) after 264 hours in water. Wood treatment with CA-SA increased the bending and compression strength of wood. TG/DTA data demonstrated that the wood/CA-SA composite left higher residue of 10.31% at 800 C than that of wood with 6.87%. The DSC measurements showed that the obtained wood/CA-SA composite had a good TES capacity of about 94 J/g at 23.94 C. The cycling DSC results confirmed the eutectic PCM in wood indicated high chemical stability and storage/release reliability even though it was run 600 times melt/freeze. According to thermal performance test, the wood/CA-SA composite has ability of storing excess heat in the environment and preventing the heat flow to the environment. It can be concluded that the fabricated wood/CA-SA composite can be used for indoor temperature regulation and energy saving in timber buildings.

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Application of a ground source heat pump system with PCM‐embedded radiant wall heating for buildings

Cited by 23 publications

References 18 publications

Environmental Performance of Innovative Ground-Source Heat Pumps with PCM Energy Storage

Environmental Performance of Innovative Ground-Source Heat Pumps with PCM Energy Storage

Thermal energy storage properties of polyethylene glycol grafted styrenic copolymer as novel solid‐solid phase change materials

Phase change material impregnated wood for passive thermal management of timber buildings

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