Long term performance of evacuated tubular solar water heaters in Sydney, Australia

Morrison, Graham; Tran, Nam H.; McKenzie, David R.; Onley, I.; Harding, G.L.; Collins, Richard

doi:10.1016/0038-092x(84)90253-6

Cited by 52 publications

(11 citation statements)

References 8 publications

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“…To avoid this harmful phenomenon, the so-called evacuated tube collectors have been introduced. They consist of glass evacuated tubes, through which the absorption pipes are installed [8] and [9].…”

Section: Introductionmentioning

confidence: 99%

Heating by flat plate collector combined with a heat pump

2018

SV-JME

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The aim of the research was to establish the efficiency of the combination flat plate collector-heat pump versus ambient air-heat pump. The extensive measurements were carried out and analyzed of the flat plate collector alone and combination flat plate collector-heat pump. In the beginning, the heat pump introduction into the serial combination with flat plate collectors was analyzed. The appropriate test rig with measurement equipment was designed and built. The test rig base consisted of the flat plate collector, heat pump, and 300 l boiler that was a replacement for a house`s heating. Detailed temperature measurements were performed during rainy, sunny and cloudy weather in summer and winter. To estimate the efficiency of heating, the consumed electric energy versus heat is the universal criterion that is derived from the Coefficient of performance (COP), which is calculated on the basis of measured temperatures. The comparison of the calculated COP for the combination flat plate collector-heat pump and the air-water heat pump shows that the largest increase of the COP of the combination flat plate collector-heat pump in comparison with the air-water heat pump is on sunny winter days, and that it amounts to 38 %. In rainy and cloudy weather, the COP of the flat plate collector-heat pump combination is lower than the air-water heat pump COP. The presented analyses clearly indicated that use of the flat plate collector is limited.

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Section: Introductionmentioning

confidence: 99%

Heating by flat plate collector combined with a heat pump

2018

SV-JME

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“…Instead of listing tedious mathematical works, in this paper, we provide vital details about the general modeling and HTS process. Since tube solar collectors have a substantially lower heat loss coefficient than other types of collectors [12,32], WGET-SWHs gradually become popular during the past decades [33][34][35], with the advantages of excellent thermal performance and easy transportability [36,37]. With this reason, we chose the WGET-SWH system as a typical SWH, to show how a well-developed ANN model can be used to cost-effectively optimize the thermal performance of an SWH system, using an HTS method.…”

Section: Introductionmentioning

confidence: 99%

Predictive Power of Machine Learning for Optimizing Solar Water Heater Performance: The Potential Application of High-Throughput Screening

Liu

et al. 2017

International Journal of Photoenergy

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Predicting the performance of solar water heater (SWH) is challenging due to the complexity of the system. Fortunately, knowledge-based machine learning can provide a fast and precise prediction method for SWH performance. With the predictive power of machine learning models, we can further solve a more challenging question: how to cost-effectively design a highperformance SWH? Here, we summarize our recent studies and propose a general framework of SWH design using a machine learning-based high-throughput screening (HTS) method. Design of water-in-glass evacuated tube solar water heater (WGET-SWH) is selected as a case study to show the potential application of machine learning-based HTS to the design and optimization of solar energy systems.

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“…ETSCs have considerably lower cost and heat loss than the standard FPCs [7,8]. On the other hand, an ETSC overcomes both these drawbacks due to the presence of vacuum in annular space between two concentric glass tubes, which eliminates sun tracking by its tubular design.…”

Section: Introductionmentioning

confidence: 99%