Thermodynamic and techno-economic analysis of heat pipe ETC water heating system for Indian composite climate

Chopra, K.; Tyagi, V.V.; Pandey, A.K.

doi:10.1007/s10973-019-08487-z

Cited by 8 publications

(3 citation statements)

References 30 publications

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“…Various studies were conducted with the purpose of analyzing the impact of PCM integration with SWH systems instead of using it as a separate storage unit. Chopra et al [11] evaluated the 4E analysis of the HP-ETC based SWH system for Jammu's diverse climate. The system was planned and constructed for a family of six occupants.…”

Section: Hot Water Consumption In Buildingsmentioning

confidence: 99%

Hot Water Generation for Domestic Use in Residential Buildings via PCM Integrated U-Tube Based Solar Thermal Collector: A 4-E Analysis

et al. 2023

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In recent years, building energy consumption has increased every day due to population growth and an increased human desire for a healthy and pleasant lifestyle, and this is responsible for a crisis of energy shortages worldwide. Therefore, use of solar water heating (SWH) systems in buildings for hot water demand is the prime need of the hour to maintain sustainability. The novelty of this work was in developing a phase change material (stearic acid)-filled U-tube based evacuated tube solar collector (collector A). In addition, another collector B, left without energy storage material, was considered a reference unit for comparing the energy and exergy outputs. The study’s main aim was to examine the energy, exergy, enviro- and exergoeconomic analysis of newly developed water heating systems. The findings of study revealed that the maximum daily energy outputs of collector A were found to be 85.86% (simultaneous mode) and 84.27% (midday charging mode) at a high mass flow rate (0.5 LPM), and exergy outputs were 19.41% and 21.35%, respectively, at a low flow rate. The thermal output of collector A was higher than that of collector B. The per liter cost of hot water produced from collector A with PCMs was found to be INR 0.1261 and INR 0.1276, respectively, under both modes, which is less compared with the electric geyser (0.325 INR). The levelized energy cost, net present worth, and the payback time of the developed collector A obtained were 4.61 INR/kWh, INR 49710, and 4.49 years (simultaneous), and 4.67 INR/kWh, INR 48130, and 4.64 years (mid-day charging), respectively. Furthermore, the amount of CO2 mitigation from the energy and exergy perspective for collector A was found to be 24.30 and 23.76 tCO2/lifetime and 5.31, 5.58 tCO2/lifetime, respectively.

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Section: Hot Water Consumption In Buildingsmentioning

confidence: 99%

Hot Water Generation for Domestic Use in Residential Buildings via PCM Integrated U-Tube Based Solar Thermal Collector: A 4-E Analysis

et al. 2023

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“…It was demonstrated that the variation in the collected efficiency with an energy storage material was approximately 30% smaller than that without storage. Chopra et al [9] tested a SWH system equipped with a HP-ETC via 3-E analysis for the climate conditions of Jammu (India). They tested the system for six different flow rates from 20 to 60 LPH.…”

Section: Introductionmentioning

confidence: 99%

Energetic, Exergetic, and Heat Transfer Assessment of PCM-Integrated Heat-Pipe-Based ETSC for Clear and Cloudy Weather Conditions

et al. 2023

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Solar energy’s most promising application is in water heating, followed by other solar thermal applications. In this investigation, a novel method of incorporating a phase-change material (PCM) between the annulus space of an evacuated tube and an aluminum finned heat pipe is employed. During day time, the PCM stores the excess amount of heat and releases it in order to heat the flowing water during high-demand/insufficient solar radiation. This study aims to evaluate the detailed heat transfer assessment and energetic and exergetic efficiencies of the developed PCM-integrated solar water heater in both clear and cloudy weather conditions at 20 LPH. The outcomes of the study found that the maximum useful amounts of energy collected daily for the clear and cloudy days were 10.65 MJ and 8.52 MJ, respectively, whereas temperatures of the stored water were found to be 45.2 °C and 41.4 °C on the next day at 6:00 a.m. for the corresponding days. The daily energetic and exergetic outputs of the designed system were 76.57% and 79.64%, and 2.37% and 1.38%, respectively, at fixed mass flow rate for the clear and cloudy day conditions. The overall heat transfer coefficients (UL) for both days were 0.75 and 0.72 W/m2 K, respectively. The findings show that the proposed system overcomes the issue of overheated heat pipes and can provide hot water even in cloudy/low-sunshine conditions.

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“…It was demonstrated that the variation in collected efficiency with PCM is approximately 30% smaller than without PCM. Chopra et al, [11] tested SWH system equipped with HP-ETC by 3-Eanalysis for climate conditions of Jammu (India). They conducted the experiments for six mass flow rates of 20-60 LPH.…”

Section: Introductionmentioning

confidence: 99%

Energy and exergy analysis of heat pipe based SWH system integrated with phase change material for clear and cloudy days: An experimental approach

Pathak

Tyagi

Chopra

et al. 2022

Preprint

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Solar water heating is the most promising way to effectively use solar energy among all other solar energy applications. In this study, an innovative way of incorporatingphase change material (PCM) between the annulusspace of the heat pipe and the evacuated tubes for solar water heaters (SWHs) is used. The proposed system can deliver hot water when demand is high/solar radiation is insufficient by using palmitic acid as PCM. The energetic and exergetic analysis of the developed systemintegrated with PCM is studied on both clear and cloudy days. The results revealed that the maximum daily collected useful energyfor the clear and cloudy days was10.65 MJ & 8.52MJ respectively, whereas the maximum storage tank temperature was found to be 46.2°C and 41.4°C for the corresponding days. The daily average energetic and exergetic efficiencies of the proposed system were found to be 76.57% and 79.64%, and 2.37% and 1.38%, respectively at a fixed mass flow ratefor clear and cloudy days conditions.The results reveal that the designed system eliminates the problem of overheating heat pipes and can supply hot water even under cloudy conditions.

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Thermodynamic and techno-economic analysis of heat pipe ETC water heating system for Indian composite climate

Cited by 8 publications

References 30 publications

Hot Water Generation for Domestic Use in Residential Buildings via PCM Integrated U-Tube Based Solar Thermal Collector: A 4-E Analysis

Hot Water Generation for Domestic Use in Residential Buildings via PCM Integrated U-Tube Based Solar Thermal Collector: A 4-E Analysis

Energetic, Exergetic, and Heat Transfer Assessment of PCM-Integrated Heat-Pipe-Based ETSC for Clear and Cloudy Weather Conditions

Energy and exergy analysis of heat pipe based SWH system integrated with phase change material for clear and cloudy days: An experimental approach

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