Experimental investigation of heat removal factor in solar flat plate collector for various flow configurations

Malvi, C. S.; Gupta, Arpit; Gaur, Manoj Kumar; Crook, R.; Dixon-Hardy, Darron

doi:10.1080/15435075.2016.1268619

Cited by 23 publications

(9 citation statements)

References 14 publications

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“…Gopal Sivaraman et.al., proposed that the flat plate bend tube solar collector employs additional energy which in turn enhances the outlet water temperature [7]. Malvi C S et al, experimentally pointed out the heat removal factor is highly influenced by the systems fin efficiency and its value does not increases for the mass flow rate beyond 4 kg/h [8]. Orlando Montoya-Marquez et al, showed that the heat removal factor linearly increases with 14.5% change for inclinations from horizontal to vertical [9].…”

Section: Introductionmentioning

confidence: 99%

An exergy analysis for overall hidden losses of energy in solar water heater

2022

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This study investigates the hidden thermal losses of glass plate, collector plate, water pipe and storage tank of solar water heater in the process of energy conversion. The present non-conventional energy methods are insufficient, whereas the exergy analysis provides a remarkable solution. Thus, employing the exergy analysis, entropy generation, exergy destruction and exergy efficiency of each subsystem of solar water heater are computed. The obtained results showed that the entropy generation and exergy destruction are high during the heat transfer in each subsystem. Henceforth, the existing solar water heater design is modified placing hexagonal honeycomb structure between the glass plate and the collector plate and also water pipe is insulated to trap huge amount of solar energy. The proposed design exhibits improved exergy efficiency when compared with the existing model, which enhances the performance of the system.

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Section: Introductionmentioning

confidence: 99%

An exergy analysis for overall hidden losses of energy in solar water heater

2022

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“…Some of those studies are concentrated on the application of different PCMs [16,17], while others are concentrated on the storage tank [18,19]. The integration of PCM into the solar collector can be under the absorber plate of the collector, concentrically to the flow line [20] or as a separate thermal energy storage unit [15,16], [21]. However, the most compact configuration for a flat-plate collector is to put the thermal storage tank under the absorber plate.…”

Section: Introductionmentioning

confidence: 99%

Computational Approach of Charging and Discharging Phases in a Novel Compact Solar Collector with Integrated Thermal Energy Storage Tank: Study of Different Phase Change Materials

et al. 2022

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A numerical study was carried out to investigate charging and discharging processes of different phase change materials (PCMs) used for thermal storage in an innovative solar collector, targeting domestic hot water (DHW) requirements. The aim was to study PCMs that meet all application requirements, considering their thermal performance in terms of stored and retrieved energy, outlet temperatures, and water flow rate. Work was carried out for three flat-plate solar panels of different sizes. For each panel, a PCM tank with a heat exchanger was attached on the back plate. Simulations were conducted on a 2D domain using the enthalpy–porosity technique. Three paraffin-based PCMs were studied, two (A53, P53) with phase-change temperatures of approximately 53 °C and one of approximately 58 °C (A58H). Results showed that, during charging, A58H can store the most energy and A53 the least (12.30 kWh and 10.54 kWh, respectively, for the biggest unit). However, the biggest unit, A58H, takes the most time to be fully charged, i.e., 6.43 h for the fastest feed rate, while the A53 unit charges the fastest, at 4.25 h. The behavior of P53 lies in between A53 and A58H, considering stored energy and charging time. During discharging, all PCMs could provide an adequate DHW amount, even in the worst case, that is, a small unit with a high hot water consumption rate. The A58H unit provides hot water above 40 °C for 10 min, P53 for 11 min, and A53 for 12 min. The DHW production duration increased if a bigger unit was used or if the consumption rate was lower.

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“…Calise et al 14 experimentally investigated a finite -volume model for an unglazed photovoltaic/thermal collector in one -dimension and carried out a sensitivity analysis to determine its energetic performance. Malvi et al 15 experimentally pointed out heat removal factor F R is highly influenced by the systems fin efficiency and for the mass flow rate beyond 4 kg/hr, its value does not increase. Pandey and Chaurasiya 16 presented an overview on various methods and processes that are used to improve the flat plate solar collector's efficiency and innovative ideas are also proposed to trap huge energy from flat plate collector.…”

Section: Introductionmentioning

confidence: 99%

Minimizing the overall loss coefficient of flat plate solar collector using energy, entropy and exergy analysis

Sathyakala

Gangadharan

Kalaiarasu

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this paper, Energy, Entropy and Exergy (EEE) analysis of flat plate solar collector is studied through a mathematical model by considering the overall loss coefficient as a non-constant parameter. The overall loss coefficient is calculated by minimizing the top loss coefficient using Lagrange multiplier optimization technique and also by empirical formulas. Further, energy efficiency, entropy generation, exergy destruction and exergy efficiency of the flat plate solar collector are also determined for the both aforesaid overall loss coefficients. The exergy efficiency of the proposed model has been doubled, when compared with the experimental measurements in the earlier literature. Also, comparing the proposed methods, it is observed that exergy efficiency obtained by using the minimal top loss coefficient is reasonably high and it enhances the overall collector’s efficiency.

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Experimental investigation of heat removal factor in solar flat plate collector for various flow configurations

Cited by 23 publications

References 14 publications

An exergy analysis for overall hidden losses of energy in solar water heater

An exergy analysis for overall hidden losses of energy in solar water heater

Computational Approach of Charging and Discharging Phases in a Novel Compact Solar Collector with Integrated Thermal Energy Storage Tank: Study of Different Phase Change Materials

Minimizing the overall loss coefficient of flat plate solar collector using energy, entropy and exergy analysis

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