Optimized design and operation of heat-pipe photovoltaic thermal system with phase change material for thermal storage

AbstractIncrease in solar fraction has been noted as one of the main goals for wider application of domestic solar thermal systems. To increase solar fraction, higher energy density thermal storage availability is a key point. In this paper phase change materials have been analysed as part of a domestic solar thermal system. Sensitivity analysis of annual simulation in TRNSYS with climate data of Riga, Latvia is used. The paper also explores better methods for evaluating phase change material (PCM) performance based on temperature measurements in PCM. The results showed that the melting point of PCM and temperature set point of an auxiliary heater have the highest sensitivity of aspects analysed in the paper. It also reports that the coefficient of variation of energy in PCM correlates well with solar fraction and can be used as a parameter to evaluate PCM’s suitability for certain applications.

Download Full-text

Exergo-economic analysis of a serpentine flow type water based photovoltaic thermal system with phase change material (PVT-PCM/water)

Solar Energy ◽

10.1016/j.solener.2019.09.063 ◽

2019 ◽

Vol 193 ◽

pp. 195-204 ◽

Cited By ~ 15

Author(s):

Taher Maatallah ◽

Richu Zachariah ◽

Fahad Gallab Al-Amri

Keyword(s):

Economic Analysis ◽

Phase Change ◽

Phase Change Material ◽

Thermal System ◽

Flow Type ◽

Photovoltaic Thermal System ◽

Water Based ◽

Type Water ◽

Change Material

Download Full-text

Performance assessment of novel photovoltaic thermal system using nanoparticle in phase change material

International Journal of Numerical Methods for Heat &amp Fluid Flow ◽

10.1108/hff-05-2018-0257 ◽

2019 ◽

Vol 29 (4) ◽

pp. 1490-1505 ◽

Cited By ~ 5

Author(s):

Alper Ergün ◽

Hilal Eyinç

Keyword(s):

Phase Change ◽

Phase Change Material ◽

Paraffin Wax ◽

Thermal System ◽

Thermal Systems ◽

Content Type ◽

Pv Panel ◽

Photovoltaic Thermal System ◽

Energy And Exergy Analysis ◽

Change Material

Purpose Nanotechnology has developed gradually in recent years and it is encountered in various applications. It has many usage area especially in energy systems. The purpose of this study, in a photovoltaic thermal system, thermal behaviours of a PV panel has been investigated by energy and exergy analysis method using a phase change material inserted 5 per cent weighted Al2O3 nanoparticle. Design/methodology/approach In this study, one of the three different PV panels was kept normally, the other one was filled with a phase changing material (paraffin-wax) and the last panel was filled with the mixture of a nanoparticle and paraffin-wax. Findings After the analyses, especially during the time intervals when the radiation is high, it is found that the panel with Np-paraffin mixture has a high electrical and thermal efficiency. In addition, as a result of the exergy analyses, average exergy efficiency of the panel with Np-paraffin mixture has been determined as 10 per cent, whereas that of the panel with paraffin as 9.2 per cent. Originality/value Nanoparticles had not been used with PCMs in photovoltaic–thermal systems in the studies made before.

Download Full-text