Design and performance analysis of a new evacuated tube solar air heaters equipped with fins and coils

Hamed, Tareq Abu; Alkharabsheh, Salem

doi:10.1080/14786451.2020.1798446

Cited by 15 publications

(4 citation statements)

References 38 publications

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“…• Air flow rate Abu Hamed and Alkharabsheh [64] • At both the lowest flow rate and the maximum flow rate, the system with aluminum fins had the greatest air temperature differential and the greatest efficiency designed absorber.…”

Section: • Additional Circular Fins and Copper Coilmentioning

confidence: 99%

“…Abu Hamed and Alkharabsheh [64] developed new evacuated tube solar air heaters with different configurations of copper tube: without fins neither coils attached to the copper tube, with copper coil spiraled on the copper tube, and with aluminium fins attached to the copper tube. The configurations were tested experimentally to find the best configuration with the highest thermal performance at different flow rates of 0.6, 0.9, and 1.25 m3/min.…”

Section: Modification Of Flow Passagesmentioning

confidence: 99%

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Evacuated tubes solar air collectors: A review on design configurations, simulation works and applications

Sulaiman¹,

Ihsan

Bakar

et al. 2023

PROGEE

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One of the primary components of solar energy utilization systems is evacuated tube solar air collectors (ETSACs). The irradiance is absorbed by these collectors, which is then transformed into thermal energy at the absorbing surface before being transmitted to the air passing through the collectors. This type of collector outperforms flat plate collectors in terms of reducing heat loss through conduction and convection and also during cloudy days; thus, ETSACs are the most preferred collectors to be applied for space heating, crop drying, and industrial applications. This review focuses on a summary of design configurations, simulation works, and applications of ETSACs in order to understand the influence of the thermal performance of ETSACs so that these collectors can be applied more effectively. Studies on the use of nanofluids as thermal performance enhancers and phase change materials as thermal storage media can be considered to enhance the thermal performance of ETSACs.

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Section: • Additional Circular Fins and Copper Coilmentioning

confidence: 99%

Section: Modification Of Flow Passagesmentioning

confidence: 99%

Evacuated tubes solar air collectors: A review on design configurations, simulation works and applications

Sulaiman¹,

Ihsan

Bakar

et al. 2023

PROGEE

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show abstract

“…Recently, the ETSC air heater was developed by Singh and Vardhan 24 and they used helical coil inserted with co-axial pipes for improving heat transfer. Abu Hamed and Alkharabsheh 25 tested a new ETC direct air heater with various configurations experimentally to determine the configuration for better thermal performance. They employed two different high thermal conductivity metal fins and coils additionally to enhance the heat transfer between the fluid and the copper tube heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

“…CPC and U-tube heat exchanger was investigated experimentally by Wang et al 23 and their results showed that the heated air reached more than 200 C, with compressed air pressure of 2.4 bar and volume flow rate ranges between 6.8 and 7.1 m 3 / h. Recently, the ETSC air heater was developed by Singh and Vardhan 24 and they used helical coil inserted with co-axial pipes for improving heat transfer. Abu Hamed and Alkharabsheh 25 tested a new ETC direct air heater with various configurations experimentally to determine the configuration for better thermal performance. They employed two different high thermal conductivity metal fins and coils additionally to enhance the heat transfer between the fluid and the copper tube heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic evaluation of an evacuated tube solar air collector with inserted baffles

Kumar¹,

Seenivasan²,

Venkatramanan³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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Evacuated tube solar collectors exhibit excellent performance even in poor insolation periods and are highly preferred for low as well as for medium temperature applications. In this study, an evacuated tube with inserted baffle solar air collector (ETIBSAC) was developed to investigate the effect of mass flow rate of air on energy, exergy, enviro-economic characteristics. The results revealed that the maximum outlet air temperature was observed during the peak irradiance period as 80.5 °C and the system is capable of delivering hot air above 50 °C between 9:30 am to 4:00 pm in clear sky days at the mass flow rate 100 kg/h. The maximum thermal efficiency of 55.4% was achieved at the mass flow rate of 500 kg/h. The highest exergy efficiency of 2.7% was recorded at 100 kg/h and diminishes with increasing mass flow rate of air due to more exergy destruction. The cost per kWh to deliver the hot air in the range of 60 to 70 °C is estimated as 0.00027 $(0.02 INR) at the mass flow rate of 100 kg/h. It is concluded that the developed air collector can be efficiently used for process heating applications.

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Efficient solar drying techniques: a review

Jangde

Singh

2021

Environ Sci Pollut Res

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In the absence of effective drying techniques, a lot of food gets wasted as there is a lack of post-harvest processes. In India, most of the agricultural produces like paddy, maize, wheat, corn, oil seeds, pulses, chillies, etc. require a temperature range of 50-80 °C for effective drying. Hence, in these conditions, solar drying techniques seem to be the most economical; also, it is safe and eco-friendly. Various types of solar dryers are used across India and worldwide; these are direct solar dryer, green house dryer and indirect solar dryer. Nowadays, indirect type solar dryers are most commonly used because of their several advantages over direct solar dryers. In case of indirect type solar dryers, the products to be dried are kept inside a separate compartment known as drying chamber. Hot air is obtained from the solar collectors either by direct heating method or by using a secondary heating medium and then supplied to the drying chamber for heating of the products. This paper presents a detailed review of various innovative designs of indirect type solar dryers and compares the performance of different types of dryer configuration in terms of collector efficiency, dryer efficiency, drying time and maximum air temperature. Also, the effects of various operating parameters on the thermal performance of such dryers have been discussed.

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Design and performance analysis of a new evacuated tube solar air heaters equipped with fins and coils

Cited by 15 publications

References 38 publications

Evacuated tubes solar air collectors: A review on design configurations, simulation works and applications

Evacuated tubes solar air collectors: A review on design configurations, simulation works and applications

Techno-Economic evaluation of an evacuated tube solar air collector with inserted baffles

Efficient solar drying techniques: a review

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