Study on Three Dimensional Heat Transfer Model of Segmented PVT Module

Abstract

Abstract-PVT-hot components are as PVT cogeneration core equipment in the system, whose optical and thermal performance is an important factor affecting the system design and operation. Therefore, the paper innovatively presents the segmented PVT-hot water components based on the previous basic research work.This optimization design of the technology through the structure of absorber established a novel three-dimensional heat transfer model of segmented PVT components, and realized the system heat production control in the operation mode.According to different purposes a variety of refrigerant is achieved in the system running at the same time and different control.Keywords-segmented PVT components; 3D; heat transfer model; Laplace transform I. INTRODUCTIONThe development and utilization of renewable energy, such as wind energy, biomass energy and solar energy, is an important way to save fossil energy and solve environmental pollution [1][2]. At present, the solar low-temperature hot water system and solar photovoltaic power generation system applications have been rapid development [3][4]. In some areas, the economic and energy saving effects of home solar water heating systems have emerged [5]. Independent and grid connected photovoltaic power generation system is technically mature, but because of the high cost of power generation system, it is necessary to reduce the cost of photovoltaic power generation system to achieve. A new solar collector is called PVT, which combines photovoltaic power generation and solar thermal utilization at low temperature [6].The concept of collector in 1970s was put forward by literature, but it was not until nearly ten years of PVT collector was more and more attention, mainly because of the efficiency of the solar cell efficiency and solar collector efficiency with the increase of PVT collector is improved, and a new design of the PVT set the heat exchanger performance improvements. The main components of PVT collector for solar cell and a heat collecting plate, in order to reduce the heat loss of the heat collector, usually installed one or two layers of glass cover in the top of the battery, and on the back edge of a certain thickness of the insulation layer, all the parts finally as one with a metal frame package. At present, PVT heat collectors are reported to be flat and convergent. The flat plate PVT collector is simple in structure and can be processed on the basis of common heat collector, and it is easy to combine with building. Therefore, its research is wider than that of concentrator PVT collector. Depending on the cooling fluid of the collector, the PVT collector can be divided into a PVT liquid collector using water as a cooling fluid and an PVT air collector with air as a cooling fluid. In addition, the PVT collector can be divided into a covered PVT. collector and a non -cover collector.PVT collector using laminated or adhesive technology will be solar cell components and solar collector in combination when the solar cell power generation, because the inciden...