scholarly journals Application of phase-change materials in passive solar systems. Final report

1979 ◽  
Author(s):  
J. Sliwkowski
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Final Report ◽  
Solar Systems ◽  
Passive Solar

scholarly journals Materials research for passive solar systems: solid-state phase-change materials

1985 ◽  
Author(s):  
D.K. Benson ◽  
J.D. Webb ◽  
R.W. Burrows ◽  
J.D.O. McFadden ◽  
C. Christensen
Keyword(s):  
Solid State ◽  
Phase Change ◽  
Phase Change Materials ◽  
Solar Systems ◽  
Materials Research ◽  
Passive Solar

scholarly journals Reviewing the Exergy Analysis of Solar Thermal Systems Integrated with Phase Change Materials

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 724
Author(s):  
Macmanus Chinenye Ndukwu ◽  
Lyes Bennamoun ◽  
Merlin Simo-Tagne
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Second Law Of Thermodynamics ◽  
Heat Transfer Fluid ◽  
Solar Still ◽  
Thermal Systems ◽  
Solar Systems ◽  
Exergy Balance ◽  
Change Material

The application of thermal storage materials in solar systems involves materials that utilize sensible heat energy, thermo-chemical reactions or phase change materials, such as hydrated salts, fatty acids paraffin and non-paraffin like glycerol. This article reviews the various exergy approaches that were applied for several solar systems including hybrid solar water heating, solar still, solar space heating, solar dryers/heaters and solar cooking systems. In fact, exergy balance was applied for the different components of the studied system with a particular attention given to the determination of the exergy efficiency and the calculation of the exergy during charging and discharging periods. The influence of the system configuration and heat transfer fluid was also emphasized. This review shows that not always the second law of thermodynamics was applied appropriately during modeling, such as how to consider heat charging and discharging periods of the tested phase change material. Accordingly, the possibility of providing with inappropriate or not complete results, was pointed.

A Novel Passive Solar Greenhouse Based on Phase-Change Materials

1987 ◽  
Vol 5 (3) ◽  
pp. 201-212 ◽  
Author(s):  
E. KORIN ◽  
A. ROY1 ◽  
D. WOLF ◽  
D. PASTERNAK ◽  
E. RAPPEPORT
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Solar Greenhouse ◽  
Passive Solar

2 years of monitoring results from passive solar energy storage in test cabins with phase change materials

Solar Energy ◽  
2020 ◽  
Vol 200 ◽  
pp. 29-36 ◽  
Author(s):  
Kemal Cellat ◽  
Beyza Beyhan ◽  
Yeliz Konuklu ◽  
Cengiz Dündar ◽  
Okan Karahan ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Phase Change ◽  
Phase Change Materials ◽  
Solar Energy Storage ◽  
Passive Solar

scholarly journals Photovoltaic Cooling Utilizing Phase Change Materials

2020 ◽  
Vol 160 ◽  
pp. 02004
Author(s):  
Suhil Kiwan ◽  
Hisham Ahmad ◽  
Ammar Alkhalidi ◽  
Wahib O Wahib ◽  
Wael Al-Kouz
Keyword(s):  
Phase Change ◽  
Experimental Test ◽  
Phase Change Materials ◽  
Experimental Tests ◽  
Photovoltaic System ◽  
Cell Temperature ◽  
Average Cell ◽  
Solar Systems ◽  
Pv Panel ◽  
Change Material

A theoretical analysis based on mathematical formulations and experimental test to a photovoltaic system cooled by Phase Change Material (PCM) is carried out and documented. The PCM is attached to the back of the PV panel to control the temperature of cells in the PV panel. The experimental tests were done to solar systems with and without using PCM for comparison purposes. A PCM of paraffin graphite panels of thickness15 mm has covered the back of the panel. This layer was covered with an aluminum sheet fixed tightly to the panel frame. In the experimental test, it was found that when the average cell temperature exceeds the melting point temperature of the PCM, the efficiency of the system increases. However, when the cell temperature did not exceed the melting temperature of the PCM, the use of the PCM will affect negatively the system efficiency.

Modeling Phase Change Materials With Conduction Transfer Functions for Passive Solar Applications

2005 ◽  
Vol 128 (1) ◽  
pp. 58-68 ◽  
Author(s):  
Jason P. Barbour ◽  
Douglas C. Hittle
Keyword(s):  
Heat Conduction ◽  
Energy Storage ◽  
Phase Change ◽  
Phase Change Materials ◽  
Transfer Functions ◽  
Transient Heat Conduction ◽  
Building Simulation ◽  
Single Temperature ◽  
Passive Solar ◽  
Building Elements

The use of passive solar design in our homes and buildings is one way to offset the ever-increasing dependence on fossil fuels and the resulting pollution to our air, our land, and our waters. A well-designed sunroom has the potential to reduce the annual heating loads by one-third or more. By integrating phase change materials (PCMs) into building elements, such as floor tile and wallboard, the benefits of the sunroom can be further enhanced by providing enhanced energy storage. To maximize benefits from PCMs, an engineering analysis tool is needed to provide insight into the most efficient use of this developing technology. Thus far, modeling of the PCMs has been restricted to finite difference and finite element methods, which are not well suited to inclusion in a comprehensive annual building simulation program such as BLAST or EnergyPlus. Conduction transfer functions (CTFs) have long been used to predict transient heat conduction in such programs. Phase changes often do not occur at a single temperature, but do so over a range of temperatures. The phase change energy can be represented by an elevated heat capacity over the temperature range during which the phase change occurs. By calculating an extra set(s) of CTFs for the phase change properties, the CTF method can be extended to include the energy of phase transitions by switching between the two (or more) sets of CTFs. This method can be used to accurately predict the internal and external temperatures of PCM-containing building elements during transient heat conduction. The amount of energy storage and release during a phase transition can also be modeled with this method, although there may be some degree of inaccuracy due to switching between two or more sets of CTFs. CTFs have the potential to provide an efficient method of modeling PCMs in annual building simulation programs, but more work is needed to reduce errors associated with their use.

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