Green Building New Favourite: Deep Analysis of Heat Transfer Coefficient of Cadmium Telluride Power Generation Glass

Release Time:

2024-07-03


With the deepening of the "double carbon" goal and the green building policy, architects are paying more and more attention to the energy conservation and environmental protection of buildings while pursuing the beauty and functionality of buildings. In this context, BIPV (Building Integrated Photovoltaic) technology came into being, in which cadmium telluride power generation glass has attracted much attention due to its unique performance and customization advantages. however,Many building designers are worried that the heat transfer coefficient (K value) of cadmium telluride power generation glass is too high, which will affect the thermal insulation performance of the building.In this paper, the heat transfer coefficient of cadmium telluride power generation glass will be analyzed in depth, in order to eliminate the doubts of architectural designers.

 

Analysis of Heat Transfer Coefficient of 1. CdTe Power Generation Glass

Cadmium telluride power generation glass, as a new type of photovoltaic building material, integrates solar panels into glass, which not only has the power generation function, but also maintains the transparency and protective properties of the glass. For its heat transfer coefficient, we need to consider from multiple angles.

Heat transfer coefficient is an important index to measure the thermal insulation performance of materials, which reflects the heat of materials passing through unit area in unit time and unit temperature difference.For cadmium telluride power generation glass, its heat transfer coefficient is affected by many factors, including the material of the glass substrate, the thickness and structure of the photovoltaic layer, and the thermal conductivity of the intermediate layer.

 

1. Cadmium telluride power generation glass uses TCO (transparent conductive oxide) glass as the substrate, which has the effect of reflecting infrared rays. The infrared transmittance of TCO glass used in cadmium telluride power generation glass is about 60% at 780 ~ 2500nm, which is much lower than 90% of ultra-white glass. This means that more infrared rays are reflected, reducing the increase in indoor heat. Infrared is one of the main factors of indoor radiation heating, TCO glass reflection can effectively reduce the infrared through, thereby reducing the indoor temperature rise rate.

2. Cadmium telluride power generation glass converts part of solar energy into electrical energy after photoelectric conversion. According to the law of conservation of energy, compared with ordinary glass, cadmium telluride power generation glass through less light energy, further reducing the indoor heat source.

3. Thermal insulation performance of the intermediate layer: CdTe power generation glass usually adopts a hollow sandwich structure, and the intermediate layer is filled with dry air or inert gas. This structure can effectively reduce the heat conduction efficiency and improve the heat insulation performance of the glass.

4. From the point of view of energy exchange, cadmium telluride photovoltaic cells are black and can absorb most of the sunlight and convert it into heat energy. This heat energy is carried away by external convection instead of being directly radiated into the room, thereby reducing the heat transfer in the room.

 

Thermal Insulation Properties of 2. CdTe Power Generation Glass

According to the measured data of Longyan Energy, the K value of laminated single hollow cadmium telluride power generation glass is 2.5, the K value of laminated single hollow (single silver) cadmium telluride power generation glass is 1.7, the K value of laminated single hollow (double silver) cadmium telluride power generation glass is 1.6, the K value of laminated double hollow (single silver) cadmium telluride power generation glass is 1.4, and the K value of laminated double hollow (double silver) cadmium telluride power generation glass is 1.3. These values show that the cadmium telluride power generation glass has good thermal insulation performance.

Specifically, cadmium telluride power generation glass can effectively reduce the infrared into the room, significantly reducing the rapid rise of indoor temperature. At the same time, the heat insulation performance of cadmium telluride hollow laminated power generation glass> single silver insulating glass> ordinary insulating glass, which can usually reduce the indoor temperature by 2-10 degrees compared with ordinary insulating glass. In addition, in the indoor space or open corridor and other architectural forms, the use of cadmium telluride power generation glass indoor, the human body's burning sensation of sunlight will be significantly reduced.

 

Application Advantages of 3. CdTe Power Generation Glass in Green Building

Significant energy saving effect: cadmium telluride power generation glass can convert solar energy into electricity, realizing the self-sufficiency of the building. At the same time, its good thermal insulation performance can reduce indoor energy consumption and improve the energy efficiency of the building.

Environmental protection and energy saving: the use of cadmium telluride power generation glass can reduce the dependence on fossil energy, reduce greenhouse gas emissions, in line with the environmental protection concept of green building.

Beautiful and practical: cadmium telluride power generation glass to maintain the transparency and protection of traditional glass, while both power generation function, making the building in the beautiful and practical to achieve the perfect unity.

 

In summary, the cadmium telluride power generation glass is its own material and structural characteristics, and has good thermal insulation performance. Its unique TCO glass substrate, photoelectric conversion characteristics and black photovoltaic cell design reduce the indoor heat source and heat transfer. Therefore, in green building and BIPV projects, cadmium telluride power generation glass is an ideal choice.

With the continuous advancement of technology and the continuous expansion of applications, it is believed that cadmium telluride power generation glass will play a greater role in the field of green buildings, contributing to the realization of the "double carbon" goal and promoting the sustainable development of green buildings.


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