Performance comparison of thermal energy storage oils for solar cookers during charging

Mawire, Ashmore; Phori, Abigail Tlagadi; Taole, S. H.

doi:10.1016/j.applthermaleng.2014.08.032

Cited by 55 publications

(16 citation statements)

References 23 publications

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“…In this particular paper, simplified experimental heat loss and thermal destratification characteristics of a small domestic oil storage tank using three different thermal oils are presented. This paper extends the work presented in [16] on the comparison of the thermal oils during charging cycles and presents results of thermal energy retention cycles which add to understanding of heat loss mechanisms for stratified storage tanks operating above the boiling point of water.…”

Section: Introductionmentioning

confidence: 61%

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Experimental de-stratification and heat loss in a storage tank containing different thermal oils

Mawire

2016

J Braz. Soc. Mech. Sci. Eng.

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Section: Introductionmentioning

confidence: 61%

“…(2) can be expressed as where y is the axial distance between two adjacent thermocouple levels. The dimensionless temperature is defined All dimensions are in mm [16] as the ratio of the temperature T at any given time to the initial temperature T ini and is given by…”

Section: Experimental Thermal Analysismentioning

confidence: 99%

Experimental de-stratification and heat loss in a storage tank containing different thermal oils

Mawire

2016

J Braz. Soc. Mech. Sci. Eng.

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“…Mawire et al, [12] Indoor solar cooking unit Three different thermal oils; Sunflower oil, shell thermia C and shell thermia B has been evaluated for thermal performance. The exergy factor was proposed to evaluate the ratio of exergy content to energy content.…”

Section: Design Resultsmentioning

confidence: 99%

Performance Evaluation of a Solar Cooker with Low Cost Heat Storage Material

Saxena¹

2017

IJSGE

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Abstract:A solar box cooker (SBC) has been developed for the thermal performance evaluation by operating it on a low cost thermal storage. For this, a mixture of sand and granular carbon has been prepared and tested for an optimum ratio under a solar collector. After testing, the ratio of 4:6 (sand: carbon) has been observed to maintain a high temperature range with long term heat storage. This mixture has been used as thermal heat storage inside the SBC. The experimentation procedure has been conducted under climatic conditions of Moradabad, India. Results indicated that the first Figure of . The system was found feasible for cooking during the off sunshine conditions.

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“…An HP 34970 data acquisition unit (j) was connected to the thermocouples and it was used to convert analogue signals to digital signals. A personal computer (i) was used to monitor the temperature profile of the TES system and the PCMs and it recorded data every 10 s. During the charging cycles valves (1), (2), (4) and 7were closed while valves (3), (5), (6) and (8) were opened. Charging of the storage system was terminated when the bottom temperature of the storage tank (TD) was around 170 o C. Charging experiments were performed with flow-rates of 4 ml/s, 8 ml/s and 12 ml/s respectively at a set temperature of 260 o C to investigate the effect of the flow-rate.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…Thermal oil storage tanks can be used since oil vaporizes at higher temperatures than this stipulated range. Limited recent studies have been reported on thermal performance and stratification for medium temperature applications using thermal oils [6][7][8][9][10], hence it necessary to carry out this study to understand the efficiency of these systems.…”

Section: Introductionmentioning

confidence: 99%

Thermal Stratification Performance of a Packed Bed Latent Heat Storage System during Charging

Mawire¹,

Katlego²,

Lugolole

et al. 2018

E3S Web Conf.

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Experimental thermal stratification evaluation of a packed bed latent heat storage is done during charging cycles. The packed bed latent heat storage system consists of adipic acid encapsulated in aluminum spheres. Sunflower oil is used as the heat transfer fluid during charging cycles. Stratification number profiles are used to evaluate thermal stratification in the storage system. Charging experiments are carried out with three different flow-rates (4 ml/s, 8 ml/s and 12 ml/s). Charging experiments are also done using the same flow-rate (8 ml/s) with three different set heater temperatures (220 °C, 240 °C and 260 °C). The lowest charging flow-rate (4 ml/s) shows the best variation of the stratification number profile since it shows the least drop from the peak value and the shortest charging interval. Different set heater temperatures show almost identical stratification number profiles. The effect of the charging flow-rate is more significant than the effect of the charging set heater temperature when evaluating thermal stratification for this particular system.

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Performance comparison of thermal energy storage oils for solar cookers during charging

Cited by 55 publications

References 23 publications

Experimental de-stratification and heat loss in a storage tank containing different thermal oils

Experimental de-stratification and heat loss in a storage tank containing different thermal oils

Performance Evaluation of a Solar Cooker with Low Cost Heat Storage Material

Thermal Stratification Performance of a Packed Bed Latent Heat Storage System during Charging

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