Performance evaluation of solar water heating system with heat pipe evacuated tubes provided with natural gas backup

Mehmood, Aamir; Waqas, Adeel; Said, Zafar; Rahman, S. M. A.; Akram, Muhammad

doi:10.1016/j.egyr.2019.10.002

Cited by 47 publications

(17 citation statements)

References 17 publications

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“…Solar energy utilization is vital for facing important issues of our society such as global warming, fossil fuel depletion and increasing energy needs [1][2][3]. Concentrating solar power (CSP) is an important weapon for producing electricity which is the most valuable energy demand because it can cover numerous needs.…”

Section: Introductionmentioning

confidence: 99%

“… The minimum payback period is 8.37 years and is found for a 160-m 2 collecting area and a 14-m 3 storage tank, while, for the same design point, the levelized cost of electricity is minimized at 0.0969 € kWh -1 .  The multi-objective optimization procedure proved that the optimum design is for a 160-m 2 collecting area and a 14-m 3 storage tank. Moreover, this design point is the optimum according to the payback period minimization and LCOR minimization criteria.…”

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confidence: 99%

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Financial Optimization of a Solar-Driven Organic Rankine Cycle

Bellos

Tzivanidis

2020

ASI

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The objective of this work is the financial optimization of a solar-driven organic Rankine cycle. Parabolic trough solar collectors are used as the most mature solar concentrating system and also there is a sensible storage system. The unit is examined for the location of Athens in Greece for operation during the year. The analysis is conducted with a developed dynamic model in the program language FORTRAN. Moreover, a developed thermodynamic model in Engineering Equation Solver has been used in order to determine the nominal efficiency of the cycle. The system is optimized with various financial criteria, as well as with energy criteria. The optimization variables are the collecting area and the storage tank volume, while the nominal power production is selected at 10 kW. According to the final results, the minimum payback period is 8.37 years and it is found for a 160 m2 collecting area and a 14 m3 storage tank, while for the same design point the levelized cost of electricity is minimized at 0.0969 € kWh−1. The maximum net present value is 123 k€ and it is found for a 220-m2 collecting area and a 14-m3 storage tank volume. Moreover, the maximum system energy efficiency is found at 15.38%, and, in this case, the collecting area is 140 m2 and the storage tank volume 12 m3. Lastly, a multi-objective optimization proved that the overall optimum case is for a 160-m2 collecting area and a 14-m3 storage tank.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Financial Optimization of a Solar-Driven Organic Rankine Cycle

Bellos

Tzivanidis

2020

ASI

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“…The model of the SDHW system equipped with a heat pipe ETC and cooperating with an additional gas heater was made by Mehmood et al [12] in the TRNSYS software environment. An experimental setup installed at National University of Sciences and Technology, Islamabad (Pakistan) was developed to validate the simulation model.…”

Section: Introductionmentioning

confidence: 99%

New Deterministic Mathematical Model for Estimating the Useful Energy Output of a Medium-Sized Solar Domestic Hot Water System

Żukowski

Jezierski

2021

Energies

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According to the authors of this paper, the mathematical point of view allows us to see what sometimes cannot be seen from the designer’s point of view. The aim of this study was to estimate the influence of the most important parameters (volume of heat storage tanks, daily consumption of domestic hot water, optical efficiency, heat loss coefficient, and total area of a solar collector) on the thermal power output of solar domestic hot water (SDHW) system in European climatic conditions. Three deterministic mathematical models of these relationships for Madrid, Budapest, and Helsinki were created. The database for the development of these models was carried out using computer simulations made in the TRNSYS software environment. The SDHW system located at the Bialystok University of Technology (Poland) was the source of the measurement results used to validate the simulation model. The mathematical optimization procedure showed that the maximum annual useful energy output that can be obtained from 1 m2 of gross collector area is 1303 kWh in the case of Madrid, 918.5 kWh for Budapest, and 768 kWh for Helsinki weather conditions.

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“…Mehmood, et al. [ 7 ] reports that the solar thermal collector is the main component of a SWH system; it captures the incident solar radiations and converts them to useful energy that heats the water. Research has focused on optimizing the design and performance of solar thermal collectors, including the effects of varying the tilt angle among others.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the thermal performance of a solar absorber and nocturnal radiator (SAANR) hybrid panel for summer and winter seasons

Rabasoma

Nwaigwe

2020

Heliyon

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Transient analysis and performance prediction of a solar absorber and nocturnal radiator (SAANR) hybrid panel for water heating and cooling in the summer and winter seasons of Gaborone, Botswana is presented. Transient heat transfer models were developed for the panel and the models were then transformed into explicit finite difference forms for numerical analysis using MATLAB. The SAANR panel added up to 7 kWh diurnal heating energy in winter and removed up to 0.5 kWh at night through radiation cooling in summer. The resulting numerical solutions of the model were validated by comparison with experimental results and they showed excellent strength of association with a correlation coefficient of 0.832 and fairly acceptable goodness of fit at an R-squared value of 69%. Sensitivity analysis carried out showed the model to react linearly to panel area changes. From the results, it is concluded that the hybrid panel is robust enough to perform in both the summer and winter seasons of Gaborone, and areas with similar climatic conditions. This implies that the system can be used simultaneously for space cooling and domestic water heating in both summer and winter. This technology can therefore be used instead of electric water heaters and air-conditioners and thus save energy.

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Performance evaluation of solar water heating system with heat pipe evacuated tubes provided with natural gas backup

Cited by 47 publications

References 17 publications

Financial Optimization of a Solar-Driven Organic Rankine Cycle

Financial Optimization of a Solar-Driven Organic Rankine Cycle

New Deterministic Mathematical Model for Estimating the Useful Energy Output of a Medium-Sized Solar Domestic Hot Water System

Investigation of the thermal performance of a solar absorber and nocturnal radiator (SAANR) hybrid panel for summer and winter seasons

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