Theoretical and experimental study of a novel solar indirect-expansion heat pump system employing mini channel PV/T and thermal panels

Zhou, Jinzhi; Zhu, Zishang; Zhao, Xudong; Yuan, Yanping; Fan, Yi; Myers, Steve

doi:10.1016/j.renene.2019.11.054

Cited by 34 publications

(7 citation statements)

References 24 publications

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“…It differs from previous devices in that it has two reflectors that reflect the sun's rays along the long side of the device that combines PV and PVT (Figure 1). In PVT, the flow of water rises from the bottom to the top through minichannels, as in the heat collector of some devices [18]. HC is made on the basis of polycarbonate.…”

Section: Materials and Methodologymentioning

confidence: 99%

Testing of crystalline silicon-based photoelectric and photothermal batteries in real climate conditions and comparison of parameter changes

Muminov

Tursunov²,

Sabirov³

et al. 2022

J. Phys.: Conf. Ser.

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The article examines the changes in electrical parameters of three types of photovoltaic batteries (PV) and photothermal batteries (PVT) based on them, installed on a portable device with the increased intensity of solar radiation using reflective planes. In this case, without changing the position of the PV and PVT in the device, like the “network” stations, it was set so that the solar radiation falls vertically, as in the time of the rising of the sun, directed to the south. This natural experiment served two purposes. The first is to determine the optimal type for the climate when the various types of PVs available in the local commercial market are used in hot climates. Second, the results of determining and comparing the changes in parameters and energy efficiency of PV and PVT with the same base and capacity at the same time under the same conditions are presented. From the results of the experimental tests, it was clear that the best indicators in terms of short-circuit current, open circuit voltage and power in hot climates are monocrystalline PV and its base PVT. Among the PVs, the lowest values were observed in front and black back coating photoelectric battery. Among the PVTs, it was observed in the polycrystalline silicon photothermal battery. When all types of PVTs were cooled by passing water with a temperature of 18-20°C, sharp electrical changes were observed in monocrystalline silicon with a black back coating. The conclusion from the results of this change is that the use of black back coating photoelectric battery in cold climate regions leads to higher efficiency. Compared to conventional PV, PVT has been observed to generate 1.3-1.4 times more electricity depending on the type of material.

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Section: Materials and Methodologymentioning

confidence: 99%

Testing of crystalline silicon-based photoelectric and photothermal batteries in real climate conditions and comparison of parameter changes

Muminov

Tursunov²,

Sabirov³

et al. 2022

J. Phys.: Conf. Ser.

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“…Several research studies are devoted to the development of optimized components. For instance, in Zhou et al [ 50 ] a HP with a minichannel evaporator directly embedded in the solar collector is investigated that has a higher heat transfer capability than a standard plate evaporator. Moreover, the integration of the evaporator in the solar collector allows an increase in the overall solar fraction that the system can achieve.…”

Section: Solar‐coupled Vapor‐compression Heat Pumps For Space Heating...mentioning

confidence: 99%

Analysis of the Potential of Solar‐Assisted Heat Pumps: Technical, Market, and Social Acceptance Aspects

2022

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Solar‐assisted heat pumps have the potential to increase the share of renewables in the energy systems for several cases, or to increase the flexibility of smart grids and integrated thermal‐electric grids. The development of such systems requires a comprehensive approach in which technical, market, and social acceptance are all tackled at the same time. Such a holistic approach is the main objective of the present review article. To do so, an investigation is performed by categorizing the integration approaches reported in the literature, exploiting the solar source either as a low‐temperature evaporator source or as supporting the condenser during heating operation. Furthermore, hybrid integration schematics and dual‐source approaches are discussed. Market and social aspects complete the analysis, with the aim of finally identifying the current status; the main drivers and challenges are also addressed. The reported results confirm that the exploitation of solar thermal energy can increase the achievable performance of heat pumps in a broad range of climates. A favorable regulatory/financial framework and informative campaigns for businesspersons and the wide public have been identified as the main solutions to maximize the deployment of the technology in the coming years.

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“…It was further shown that the solar heat pump system could provide adequate space heating for a 150 m 2 space in real-world conditions. Zhou, Zhu, et al (2020) experimentally and theoretically investigated novel solar-assisted indirect-expansion heat pump system integrated with a novel channel PV/T collector intended for space heating under typical conditions for winter in Lvliang, China. The PV/T collector consisted of a glass cover, PV cell layer, absorber, mini-channel heat exchanger, air vent, insulation layer and frame.…”

Section: Heat Pumpmentioning

confidence: 99%

A Review of the Recent Development of Photovoltaic/Thermal (PV/T) Systems and Their Applications

Noxpanco

Wilkins

Riffat

2020

Future Cities and Environment

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Hybrid photovoltaic/thermal systems have become an important energy technology due to their capacity of producing electrical and thermal energy simultaneously, their ease of integration into buildings and good overall performance. Conventional PV systems generate waste energy in the form of heat during the conversion of solar radiation into electricity. It has been shown that the electrical efficiency of PV panels decays with the rise in the PV cell temperature. Therefore, PV performance can be optimised if this heat is removed. Air and water are the most common media used for heat removal and the energy can then be used for heating applications in buildings. In the last five decades, researchers worldwide have carried out experimental studies, simulations and numerical modelling of different types of PV/T systems. In addition to water and air, heat removal methods such as refrigerants, PCM, heat pumps and nanofluids have been analysed. This work presents an overview and discussion of the research of the different PV/T thermal control systems of the last five years. The present study highlights key points of the different techniques that exist, such as overall efficiencies, parameters and configurations, type of system, the nature of work, country of development and applications. Based on this study, it was concluded that the PV/T systems are auspicious technology and that further work should be focused on the aesthetics of the systems to promote acceptance and improvement of the efficiency.

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Theoretical and experimental study of a novel solar indirect-expansion heat pump system employing mini channel PV/T and thermal panels

Cited by 34 publications

References 24 publications

Testing of crystalline silicon-based photoelectric and photothermal batteries in real climate conditions and comparison of parameter changes

Testing of crystalline silicon-based photoelectric and photothermal batteries in real climate conditions and comparison of parameter changes

Analysis of the Potential of Solar‐Assisted Heat Pumps: Technical, Market, and Social Acceptance Aspects

A Review of the Recent Development of Photovoltaic/Thermal (PV/T) Systems and Their Applications

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