A sloping roof photovoltaic efficiency and fresh air preheating system
A technology of fresh air preheating and sloping roof, which is applied in the field of solar thermal utilization, can solve problems such as the reduction of photoelectric conversion efficiency, and achieve the effects of easy operation, lowering working temperature, and saving heating energy consumption.
Active Publication Date: 2018-09-21
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology
However, in the process of photoelectric conversion, solar photovoltaic modules will also absorb solar energy to make their surface temperature too high; because the temperature of photovoltaic modules is inversely proportional to their power generation efficiency, the photoelectric conversion efficiency is reduced
Method used
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Embodiment
[0048] Taking the climatic conditions in Xi'an as an example, such as Figure 6 As shown, using Trnsys to simulate the outlet temperature of air collector 2 in December under the conditions of sloping roof photovoltaic efficiency and fresh air preheating system, and comparing it with the outdoor ambient temperature, it can be seen that the outlet temperature of preheated air can reach 50°C, and there is Better fresh air preheating effect can achieve the purpose of reducing fresh air load.
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The invention discloses a sloping roof photovoltaic efficiency enhancement and fresh air preheating system, which comprises a photovoltaic module arranged on the sloping roof, and an air space is left between the photovoltaic module and the sloping roof; the sloping roof is installed with air The heat collector, the air heat collector is connected with the air interlayer; the top of the air heat collector is provided with a non-powered wind cap, and the non-powered wind cap communicates with the inside of the air heat collector through a connecting pipe; a fresh air preheater is installed above the room system, the preheating of the fresh air system includes a fresh air duct, one end of the fresh air duct is closed, and the other end passes through the wall of the room. The fresh air duct is provided with a fresh air supply pipe communicating with the interior of the room; The pipe is connected to the fresh air pipe, and a first butterfly valve and a second butterfly valve are respectively installed on the connecting pipe and the diversion air pipe. The invention can reduce the surface working temperature of the photovoltaic module and improve the efficiency of photovoltaic power generation; at the same time, the invention effectively utilizes waste heat to preheat fresh air, reducing the heating load in winter.
Description
technical field [0001] The invention belongs to the technical field of solar thermal utilization, and specifically relates to a sloping roof photovoltaic efficiency enhancement and fresh air preheating system for cooling solar photovoltaic modules and utilizing waste heat to improve photovoltaic power generation efficiency and reduce fresh air load of an air-conditioning system in winter. Background technique [0002] Building energy consumption is a major branch of social energy consumption and occupies a large proportion. Therefore, building energy conservation has become an important means for my country to achieve a low-carbon economy, complete energy conservation and emission reduction goals, and maintain sustainable economic development. At the same time, as a renewable clean energy, solar energy is inexhaustible and inexhaustible. Therefore, the use of solar power to meet the functional needs of buildings has become a building energy-saving measure encouraged by our co...
Claims
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IPC IPC(8): F24S20/67F24F5/00F24F7/04H02S40/44E04D13/18
CPCF24F5/0046F24F7/04F24F2005/0067F24S10/00H02S40/44Y02B10/10Y02B10/20Y02B10/70Y02E10/44Y02E10/50Y02E10/60
Inventor 刘艳峰王玥王登甲姜超
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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