scope of application

Solar thermal application industry

Technology provider

Shandong Huiyin New Energy Technology Co., Ltd.

Brief description of technology

The high-temperature collector tube is mainly used to collect solar energy in trough solar thermal power stations. It is the core component of the power station to achieve photothermal conversion. Its performance and reliability directly determine the efficiency and operation and maintenance costs of the entire trough thermal power generation system. The trough solar thermal power station tracks the sun through a concentrating heat collector, allowing sunlight to be concentrated on the heat collecting tube to heat the heat conducting fluid in the heat absorbing tube, and generates high-temperature steam through the heat exchanger to promote the steam turbine generator set to do work and generate electricity. The main key technologies involved include: 1) glass-to-metal sealing technology;2) solar spectrum selective absorption coating technology;3) anti-reflection coating technology;4) vacuum maintenance technology.

technical information

Collector tubes of various size specifications can be customized. The maximum working temperature is 580℃. At 550℃, the absorption rate is ≥96.2%, the emissivity is ≤12.%, Light transmittance ≥96.5%

Commercial applications

The world's largest solar-assisted oil recovery project: the 1GWth Miraah project in Oman, which produces steam with a temperature of 300 ° C and is used to assist the Oman Petroleum Development Company (PDO) in developing heavy oil in the Oman oil field. The project was developed by GlassPoint Solar Company of the United States with a total investment of US$600 million. All the collector tubes used in the project are supplied by Huiyin. The project covers an area of 740 acres and started construction in October 2015. It mainly uses a solar energy collection system to produce steam to heat the oil layer to improve the mobility of heavy crude oil, thereby improving oil recovery. The natural gas saved by Miraah could provide electricity to residents in a town of 209,000 people in Oman. Of course, compared to fuel burning, environmental friendliness is another major advantage of solar energy. Miraah reduces carbon dioxide emissions by more than 300,000 tons per day.

Help/support you hope to receive during the technology transfer process

no

equipment investment

The investment in major equipment required to build a production line with an annual output of 100,000 high-temperature heat collector pipes is approximately 300 million yuan. The equipment mainly includes: fully automatic steel pipe coating production line, glass sealing system, polishing machine, cleaning machine, glass tube anti-reflection coating production line, collector tube assembly production line, exhaust table, packaging line, various testing instruments, machining equipment, etc. See Table 1 in the application for details.

Annual operation and maintenance fee

The full-load production, operation and maintenance cost of an annual production line of 100,000 heat collector pipes is approximately 200 million yuan. See Table 2 in the application for details.

investment recovery period

The static investment payback period is approximately 7 years. See Table 3 in the application for details.

added benefit

no

comprehensive benefits

Since the solar thermal power generation project collects solar energy to generate electricity, the biggest feature compared with traditional thermal power generation companies is that non-renewable resources such as coal are no longer used. In this era of relatively extreme energy scarcity, solar energy can be used as a new alternative energy source and plays a non-negligible role in energy conservation. The development of solar thermal power generation has huge environmental benefits. Since solar thermal power generation construction projects use solar energy, a clean energy source, they produce almost no mission environmental pollution. This contribution to reducing natural environmental pollution is very huge. The use of solar power generation can reduce a large amount of carbon dioxide and sulfur dioxide emissions, and can also avoid the generation of ash. Compared with thermal power generation, it has huge social benefits. A trough solar thermal power station with an installed capacity of 200MW requires about 100,000 high-temperature collector tubes and can generate nearly 800 million kilowatt-hours of electricity a year. Compared with thermal power plants of the same size, it can save 260,000 tons of standard coal every year., reducing carbon dioxide gas emissions by 430,000 tons has obvious energy conservation and environmental protection benefits.

Level of impact of obstacles on technology transfer

no

technology maturity

Trough solar thermal power generation technology is currently recognized as the most mature technology route internationally. It can be said to have the highest technical maturity and commercial verification among the existing solar thermal power generation technology routes. This technology uses parabolic trough type collectors and heat collectors; dual-loop system technology using synthetic heat transfer oil, molten salt, etc. as working media is very mature. The high-temperature collector tube is a vacuum collector tube. It is the core component of the trough-type photothermal power station. It is responsible for the task of converting solar energy into heat energy. Its performance and reliability directly affect the operation and revenue of the power station. Our company has mastered today's advanced key technologies for manufacturing high-temperature heat collector pipes. The heat collector pipes produced and manufactured have been tested and certified by authoritative research institutions such as CENER and CIEMAT for solar thermal power generation, and the product performance has reached the international advanced level. The company's collector tube products are widely used in many solar thermal utilization projects at home and abroad and are deeply recognized by customers.

technical applicability

Solar thermal utilization is divided into three areas: 40℃~80℃ is the low-temperature field, 80℃~250℃ is medium temperature field, 250℃~800℃ is a high temperature field. The low-temperature field mainly provides domestic hot water and heating; the medium-temperature field mainly provides industrial and agricultural heat. Currently, the more advanced applications are air conditioning refrigeration, regional building heating and some industrial heat; the main applications of heat utilization technology in the high-temperature field are Solar thermal power generation, seawater desalination, auxiliary oil extraction, etc.

technical stability

The high-temperature collector tubes produced by Huiyin have been tested and certified by authoritative research institutions such as CENER and CIEMAT for solar thermal power generation, and their product performance has reached the international advanced level. It has been determined that the maximum working temperature of the collector tube can reach 600 ° C, the absorption rate is 96.2%, the emissivity is 12.8%, and it has very excellent mechanical properties and thermal impact properties. The failure tension of the seal reaches more than 2500 kg, and the failure pressure reaches more than 2800 kg, and the thermal impact temperature difference reaches 200℃, ensuring the reliability of the collector tube during its service life.

technical safety

In the application process, this technology uses solar energy, a clean energy source, and produces almost no environmental pollution. In the thermal utilization of solar energy, it can replace fossil fuels, thereby indirectly reducing exhaust emissions such as carbon dioxide, sulfur dioxide, and nitrogen oxides. The main raw materials for the manufacture of heat collectors are glass and steel raw materials, so they have a greater driving effect on the current glass and steel industries with serious overcapacity. In addition, the radiation scope of the industrial chain also involves many important industrial fields of the national economy such as chemicals, materials, and machinery.

Barriers to technology transfer and promotion

no

intellectual property transfer

Shandong Huiyin New Energy Technology Co., Ltd. owns independent intellectual property rights on key technologies for high-temperature heat collector tube manufacturing, all of which are obtained through independent innovation, and owns a total of 17 related patents.