Financial and energetic evaluation of solar-assisted heat pump underfloor heating systems with phase change materials

Plytaria, Maria T.; Bellos, Evangelos; Tzivanidis, Christos; Antonopoulos, K.A.

doi:10.1016/j.applthermaleng.2018.12.075

Cited by 44 publications

(7 citation statements)

References 40 publications

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“…Thermal photovoltaic seems to be the most viable system due to its low grid electricity consumption. However, the payback period of a PCM system with a flat plate collector is 18.3 years which is much greater than the one without PCM (10.2 years) [138]. In a similar work, the author has used the TRNSYS software to conduct a parametric analysis and optimization of the same building for various indoor temperatures, cost and auxiliary load required for various PCM, the volume of the storage tank, area of collector, and thickness of insulation.…”

Section: Am Nair Et Almentioning

confidence: 99%

Phase change materials in building integrated space heating and domestic hot water applications: A review

Nair¹,

Wilson²,

Huang³

et al. 2022

Journal of Energy Storage

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Section: Am Nair Et Almentioning

confidence: 99%

Phase change materials in building integrated space heating and domestic hot water applications: A review

Nair¹,

Wilson²,

Huang³

et al. 2022

Journal of Energy Storage

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“…The heat transfer control equations of the building envelopes. The transient heat transfer control equation of the building envelopes is described by equation (15) q w;j c p;w;j @T w;j @s ¼ k w;j @ 2 T w;j @z 2 (15) where q w;j , c p;w;j and k w;j are the density (kg m À3 ), specific heat (kJ kg À1 ÁK À1 ) and thermal conductivity (W m À1 ÁK À1 ) of building envelopes, respectively. Boundary condition: Equation ( 16) describes the heat transfer of the outside surface of the exterior wall.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…11,12 Floor heating systems with PCM for thermal storage have offered a better solution to increase energy storage capacity, ensuring indoor thermal comfort and reducing energy consumption; therefore, they have received increasing attention and interest of researchers around the world. [13][14][15] Recent studies have mainly focused on: (1) the preparation and performance test of PCMs with excellent performance, (2) structural design and optimization of PCM floor heating system, (3) thermal performance numerical simulation and experimental investigation of floors with PCM. Compared with the former two, there are relatively few simulation works and experimental studies on the thermal performance of PCM floor heating systems.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation on dynamic thermal performance of floor heating system with phase change material for thermal storage

Zhang

Yang

Wang

2020

Indoor and Built Environment

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The floor heating system with phase change materials (PCMs) for thermal storage is an effective approach to increase the floor thermal capacity and reduce indoor temperature fluctuation range. A two-dimensional numerical model of the floor heating system combined with PCM was developed to investigate its dynamic thermal performance in winter. To verify the reliability of the model, an experimental room was established in Beijing, China. The experiment results agreed well with the modelling results, which demonstrated that the numerical model was reliable. The effects of the phase change temperature, latent heat and thermal conductivity of PCM on the thermal performance of the floor were numerically investigated. The results showed that the phase change temperature and thermal conductivity of PCM had a significant influence on thermal comfort. At the same time, these two thermal physical parameters also played a critical role in improving the utilization rate of PCM. Conversely, the latent heat, in the range of 100 to 200 kJ/kg, had no obvious influence on the thermal performance of the floor. PCM with phase change temperature of 313 K was recommended, which could increase the average indoor temperature by 2.2 K, increase the thermal energy storage ratio by 12% and reduce indoor temperature fluctuation range by 2.2 K.

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“…The study found that, when compared to systems without PCM storage, the investigated DX-SAHP with PCM storage had 6-14% higher COP values under different modes of operation. Plytaria et al[108] also analysed integration of PCM storage to various SAHP and underfloor heating systems. The study carried out an extensive numerical modelling work in TRNSYS software package under winter operating conditions of Athens, Greece, to investigate the performance improvements offered by PCM storage units.…”

mentioning

confidence: 99%

A chronological review of advances in solar assisted heat pump technology in 21st century

Бадией

Akhlaghi

Zhao

et al. 2020

Renewable and Sustainable Energy Reviews

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This paper presents a comprehensive review on developments and advances of Solar Assisted Heat Pump technology reported in 21 st century. Combination of thermal and photovoltaic solar collectors with heat pumps has been widely used in recent decades for simultaneous heat, hot water and power generation for a broad range of applications, from providing domestic and commercial buildings with heat and power to manufacturing and agricultural applications. This review critically analyses the research reported in past two decades with particular attention to the works with substantial importance for future development of the technology. Four distinctive investigation periods were considered and key developments and dominant technologies at each period were reported. The main novelties and breakthroughs in solar assisted heat pump technology, as identified by this review, are: (1) The ban on R-12 refrigerant which lead to dominance of R-134A refrigerant for a wide range of systems and applications, (2) Increasing interest in Solar-assisted Ground Source Heat Pumps following the technological advances that made the utilization of such systems cost effective, (3) Advances in numerical analysis methods and use of Artificial Intelligence applications in investigating performance and effectiveness of various systems, and (4) Integrating the Photovoltaic/Thermal collectors with heat pumps for simultaneous heat and power generation resulting in improved performance and reliable operation of systems under severe operating conditions. Highlights• Four distinctive investigation periods from 2000 to 2020 are considered • Key developments and prevailing breakthroughs at each period are presented • Advantages and shortcomings of each study are discussed • Different types of SAHPs, applications, and performances are investigated

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Financial and energetic evaluation of solar-assisted heat pump underfloor heating systems with phase change materials

Cited by 44 publications

References 40 publications

Phase change materials in building integrated space heating and domestic hot water applications: A review

Phase change materials in building integrated space heating and domestic hot water applications: A review

Numerical and experimental investigation on dynamic thermal performance of floor heating system with phase change material for thermal storage

A chronological review of advances in solar assisted heat pump technology in 21st century

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