Water-in-glass evacuated tube solar water heaters

Morrison, Graham; Budihardjo, I.; Behnia, Masud

doi:10.1016/j.solener.2003.07.024

Cited by 211 publications

(87 citation statements)

References 3 publications

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“…A produção de tubos evacuados de vidro na China, como os da Figura 1, foi estimada em mais de 20.000.000 de tubos por ano em 2001. A maioria desses tubos foi utilizada em aquecedores de água domésticos com base no conceito de transferência direta (water-in-glass) (Morrison et al, 2004).…”

Section: Introductionunclassified

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Análise e validação do modelo transiente de transferência de calor em um coletor solar de tubos a vácuo

Oliveski¹,

Ferreira²,

Manea³

2014

ete

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Section: Introductionunclassified

“…Estudos acerca do desempenho dos coletores evacuados foram realizados, por exemplo, por Morrison et al (2004). Nesse trabalho, foram discutidos fatores de infl uência na operação dos tubos e foram apresentados estudos numéricos de circulação de água através de tubos longos.…”

Section: Introductionunclassified

Análise e validação do modelo transiente de transferência de calor em um coletor solar de tubos a vácuo

Oliveski¹,

Ferreira²,

Manea³

2014

ete

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“…These result in good performance at high temperature. Evacuated tube solar collectors based on single envelope vacuum tubes with heat-pipe removal have been commercialized in Europe, and glass evacuated tubes with U-tube heat removal system have been produced in Japan (Morrison et al, 2004). A large number of variations of the absorber shape for evacuated tube solar collectors are on the market (Lin and Furbo, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…A large number of variations of the absorber shape for evacuated tube solar collectors are on the market (Lin and Furbo, 1998). Production of all-glass evacuated tubes in China was estimated to be more than 20 million tubes per years in 2001 (Morrison et al, 2004). Evacuated tubes with CPCreflectors are also commercialized by several manufactures.…”

Section: Introductionmentioning

confidence: 99%

A Study for the Use of Solar Energy for Agricultural Industry - Solar Drying System Using Evacuated Tubular Solar Collector and Auxiliary Heater -

Lee¹

2013

Journal of Biosystems Engineering

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Purpose:The objectives of this study were to construct the solar drying system with evacuated tubular solar collector and to investigate its performance in comparison with indoor and outdoor dryings. Methods: Solar drying system was constructed with using CPC (compound parabolic concentrator) evacuated tubular solar collector. Solar drying system is mainly composed of evacuated tubular solar collector with CPC reflector, storage tank, water-to-air heat exchanger, auxiliary heater, and drying chamber. Performance test of solar drying system was conducted with drying of agricultural products such as sliced radish, potato, carrot, and oyster mushroom. Drying characteristics of agricultural products in solar drying system were compared with those of indoor and outdoor ones. Results: Solar drying system showed considerable effect on reducing the half drying time for all drying samples. However, outdoor drying was more effective than indoor drying on shortening the half drying time for all of drying samples. Solar drying system and outdoor drying for oyster mushroom showed the same half drying time. Conclusions: Oyster mushroom could be dried easily under outdoor drying until MR (Moisture Ratio) was reached to about 0.2. However, solar drying system showed great effect on drying for most samples compared with indoor and outdoor dryings, when MR was less than 0.5.

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“…Although there are several types of solar collectors, one of them that is appropriate for the low temperature application and has the low heat loss is non focusing evacuated glass tube solar collector. Consequently many researches have concentrated on this collector (Balzar et al, 1996;Beikircher et al, 1996;Esen, 2004;Kim and Seo, 2007;Li and Wang, 2006;Morrison et al, 2004;Zhang and Yamaguchi, 2008). Both the single-phase open and the two-phase closed thermosyphons were applied in it.…”

Section: Introductionmentioning

confidence: 99%

Computational Study of Hybrid Water Heater with Evacuated Glass Tube Solar Collector and Rice Husk Combustion

Charoensawan¹,

Wannagosit²

2010

Energy Research J.

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Problem statement:The thermal performance modeling of hybrid water heater with evacuated glass tube solar collector and flue gas of rice husk combustion was developed. The solar global radiation and ambient air temperature data used in the system modeling belongs Phitsanulok province from 7 am-5 pm in the summer season. Approach: The system can be divided into two parts, i.e., evacuated glass tube thermosyphon solar collector and thermosyphon heat exchanger with flue gas of rice husk combustion. The evacuated glass tube was a coaxial double-layer tube made of Borosilicate. Its outer tube diameter and inner tube diameter were 58 and 47 mm respectively. The inside cavity of evacuated glass tube holed thermosyphon which was made of copper tube and filled with R134a at the filling ratio of 70% of evaporator volume. For latter, the temperature and flow rate of flue gas that was released from the cyclone furnace and used as a heat source of heat exchanger were constant at 150°C and 50 m 3 min −1 . The heat exchanger was consisted of array of thermosyphon which was made of stainless steel tube and filled with distilled water at 50% filling ratio of evaporator volume. Results: The effects of various parameters on the system performance were computational analyzed. The hybrid water heater system with optimum design of both thermal performance and economic can be obtained and produce the hot water at the temperature exceeding 70°C and the flow rate of 1 m 3 day −1 . Conclusion: The thermal performance of this optimum hybrid water heater system was investigated along the time of the day in summer.

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Water-in-glass evacuated tube solar water heaters

Cited by 211 publications

References 3 publications

Análise e validação do modelo transiente de transferência de calor em um coletor solar de tubos a vácuo

Análise e validação do modelo transiente de transferência de calor em um coletor solar de tubos a vácuo

A Study for the Use of Solar Energy for Agricultural Industry - Solar Drying System Using Evacuated Tubular Solar Collector and Auxiliary Heater -

Computational Study of Hybrid Water Heater with Evacuated Glass Tube Solar Collector and Rice Husk Combustion

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