A review on recent development of thermal performance enhancement methods of flat plate solar water heater

Vengadesan, Elumalai; Senthil, Ramalingam

doi:10.1016/j.solener.2020.06.059

Cited by 121 publications

(23 citation statements)

References 173 publications

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“…In latent thermal exchangers, water is usually used as HTF. Recent research has suggested the use of liquid nanomaterials, which have superior thermal conductivity and a higher heat transfer rate than the basic liquid [3]. In their solid shape, liquid metals are good melting temperatures and are extremely tough.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of the Thermal Performance of a Latent Heat Energy of Helical Coil for the Application of Solar Energy

Jayakumar

Rubavathy

Karpagam³

et al. 2022

International Journal of Photoenergy

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The latent thermal power storage system has more characteristics than the sensitive storage system. The heating system is a process of releasing and absorbing heat energy using phase transfer material (PCM) and it provides more efficient energy than sensible heat storage. This also consist of high energy storage and high density. It provides high heat transfer in low volume and thereby enhances heat transfer. This enhances the capacity and efficiency of the EFU while extending the service life. The coil tube is designed for latent thermal energy storage to implement and enhance thermal performance during the loading and unloading process. The offloading time, however, was not affected by the flows. Higher throughput has also been shown to improve the effectiveness of recovery. The direction of flow of the HTF did not affect the total time of loading and recharging but affected the temperature changes of the PCM in the energy storage element. It is intended to predict the ability to store maximum energy as higher energy efficiency during the phase shift process. Parameters such as the mean temperature of the PCM, the growth of the melting front, the energy efficiency, and the number of generations of entropy are studied.

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Section: Introductionmentioning

confidence: 99%

Experimental Analysis of the Thermal Performance of a Latent Heat Energy of Helical Coil for the Application of Solar Energy

Jayakumar

Rubavathy

Karpagam³

et al. 2022

International Journal of Photoenergy

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“…Consequently, substantial efforts are in progress aimed at improving exploitation and conversion technologies of renewable energy resources. Solar energy, being one of such resources with universal availability and accessibility, is currently being practically exploited for electricity generation using the photovoltaic (PV) and concentrated solar power (CSP) technologies, 2 but also other applications, such as feeding air‐conditioning systems, 3 heating water in thermal solar systems 4 and solar green houses, 5 are being explored towards efficient exploitation of this renewable source. While PV systems convert solar irradiation directly to electricity for immediate applications, they are limited in the use of solar energy in the thermal form 6 .…”

Section: Introductionmentioning

confidence: 99%

Thermocline vs. two‐tank direct thermal storage system for concentrating solar power plants: A comparative techno‐economic assessment

Cascetta

Petrollese

Oyekale

et al. 2021

Intl J of Energy Research

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This paper concerns the ongoing studies on a Concentrated Solar Power (CSP) plant in operation in Ottana (Italy), comprising a 629 kW organic Rankine cycle (ORC) unit fed by a linear Fresnel solar field. Hexamethyldisiloxane (MM) and "Therminol SP-I" are used respectively as ORC working fluid and heat transfer fluid in the solar receivers. A two-tank direct Thermal Energy Storage (TES) system is currently integrated in the CSP plant, serving as a direct interface between solar field and ORC. With the view of improving the solar facility, two alternative TES configurations were proposed in this study: a one-tank packed-bed TES system using silica as solid storage media and another similar one including encapsulated phase-change material (molten salt). Comprehensive mathematical models were developed for simulating daily behaviour as well as for assessing yearly performance of the various TES technologies. Furthermore, a preliminary economic analysis was carried out. Results showed poorer response of the one-tank TES system to large fluctuations in the ORC inlet fluid temperature, leading to reduction in the mean ORC efficiency (18.2% as against 19.7% obtained with the two-tank TES). Conversely, higher energy storage density and lower thermal losses were obtained adopting the one-tank TES, resulting in about 5% more annual solar energy yield. Invariably, equivalent annual ORC energy production of 0.92 GWh/year was obtained for the three TES configurations. Additionally, adopting a onetank TES system meant that the purchase costs of a second tank and its storage medium (thermal oil) could be saved, resulting in investment costs about 45% lower and, ultimately, levelized cost of storage about 48% lower than what obtains in the two-tank TES system.

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“…This research work used a flat plate solar collector (FPSC) as a non-concentrating STC. FPSC is known as a conventional solar energy-exploiting device and is the foundation of domestic solar water heating worldwide [4,5].…”

Section: Introductionmentioning

confidence: 99%

Effect Of Design Parameters of Serpentine-Shaped Flat Plate Solar Collector Under Malaysia Climate Conditions

Hanoin

Muhamad

Mokhtar

et al. 2021

ARFMTS

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Solar thermal energy plays a vital role in the industrial sector, especially for water heating applications. Further research to improve the efficiency of flat plate solar collectors by focusing on collector design modification is imperative. This research aimed to carry out an experimental investigation on comparative designs and fabrication approaches that deal with the analysis of flat plate solar collector thermal performance, thermal efficiency, the effect of various mass flow rates, and pressure drop analyses. In this paper, a different design modification of pipe collector with serpentine-shaped was established with different tube diameters (3/4-inch and 3/8-inch), and different pipe spacing (18.5 cm and 27.0 cm). Under the same heat radiation intensity and constant mass flow rate, a pipe collector with a tube diameter of 3/4-inch achieved 3.5% and 9.4% higher thermal performance and collector efficiency respectively compared to the tube diameter of 3/8-inch. Furthermore, the pipe collector with pipe spacing of 18.5 cm exhibited 4.3% and 12.6% higher thermal performance and collector efficiency respectively compared to pipe spacing of 27 cm. The relationship between collector efficiency and temperature difference was also investigated. Moreover, the effect of different mass flow rates was studied upon and it was found that a flow rate of 0.03 kg/s exhibited optimum thermal performance for the pipe collector. Additionally, a pressure drop was observed with the increase in flow rate, while decreases when the fluid temperature increases.

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A review on recent development of thermal performance enhancement methods of flat plate solar water heater

Cited by 121 publications

References 173 publications

Experimental Analysis of the Thermal Performance of a Latent Heat Energy of Helical Coil for the Application of Solar Energy

Experimental Analysis of the Thermal Performance of a Latent Heat Energy of Helical Coil for the Application of Solar Energy

Thermocline vs. two‐tank direct thermal storage system for concentrating solar power plants: A comparative techno‐economic assessment

Effect Of Design Parameters of Serpentine-Shaped Flat Plate Solar Collector Under Malaysia Climate Conditions

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