Green power development system energy saving is the key

With frequent policies, the task of saving energy and reducing consumption in the power industry is arduous

The China Electricity Regulatory Commission recently announced that the “Regulatory Evaluation of Key Indicators for Energy Saving and Consumption Reduction in Electric Power Enterprises” will be implemented starting from November 1. The power companies’ energy consumption and power transmission costs will be strictly controlled in terms of standard coal consumption and standard coal consumption. To promote the development of low-carbon green power. In the future, the power regulatory agency will publish the annual coal consumption rate of the power supply enterprises within the scope of supervision within the scope of supervision every year, and put forward regulatory opinions.

The planning report of the China Electricity Council’s “Twelfth Five-Year Plan for the Electric Power Industry” proposes to promote the green development of the power industry: through the development of non-fossil energy and reducing coal consumption for power supply, compared with 2010, the power industry in 2015 Save 264 million tons of standard coal annually, reduce 650 million tons of carbon dioxide, 5.65 million tons of sulfur dioxide, and 2.48 million tons of nitrogen oxides. Compared with 2015, the power industry will save 273 million tons of standard coal annually and reduce carbon dioxide emissions by 676 million tons by 2020. Tons, 5.84 million tons of sulfur dioxide, and 2.56 million tons of nitrogen oxides.

It can be seen that the task of saving energy and reducing consumption in the power industry is increasingly arduous, and measures such as traditional equipment upgrades or technological replacements are far from meeting the development needs. Therefore, if the power companies want to truly achieve green and low carbon, they must have gesep.com. Focus on the whole and seek energy-saving system solutions for the entire process and the entire life cycle. So, how can we find this new energy-saving solution?

Industrial waste heat recovery technology brings hope for energy saving and emission reduction of power plants

Industry experts pointed out that improving energy efficiency and reducing coal consumption are important ways and means for the power industry to achieve green development. At present, the production process of condensing coal-fired power plants, which are widely used, is generally composed of coal-contained pulverizing systems, combustion systems, air-circulation environmental protection systems, ash disposal and discharge systems, and thermal systems. Thermal power plants convert coal-fired thermal energy into There is a lot of energy loss in the electrical energy process.

The total amount of coal-burning heat is generally only about 35% converted to electrical energy, while more than 50% to 60% of the thermal energy is released to the environment through the circulating cooling water of the steam turbine condenser. Li Zonggong, R&D center of Dunan (Tianjin) Energy Saving System Co., Ltd., the largest energy-saving system integration service provider in China, explained that since heat loss cannot be avoided, it must be used through waste heat recovery technology in order to increase the overall heat efficiency. , Reduce coal consumption in power plants and at the same time reduce heat pollution to the environment. With the development of heat pump technology, especially the successful development of large-scale high-temperature water source heat pumps, the condensing heat recovery of generator sets has become possible. The use of absorption heat pump or centrifugal heat pump technology can use a variety of thermal energy, such as steam, hot water and fuel combustion as the driving heat source; a variety of low-grade heat sources, such as waste heat, exhaust heat as a low-temperature heat source.

Taking the energy-saving absorption heat pump heating technology of Dunan as an example, for each input of 1 GJ of energy, 0.7 GJ of thermal energy can be extracted from the residual water at 20° C. to 30° C., resulting in 1.7 GJ of high-grade energy. Taking a power plant with an installed capacity of 2300 MW as an example, through the use of heat pump technology, it is possible to recover about 2 million GJ of waste heat per heating season (calculated by 120 days), equivalent to an annual heating energy consumption of 5.5 million square meters of buildings, equivalent to annual savings of standard coal. 6.8 million tons, 178,000 tons of carbon dioxide emission reductions, 1,466 tons of sulfur dioxide emissions, 644 tons of nitrogen oxides, 1028 tons of dust emissions, and the amount of carbon dioxide emissions equivalent to 10 million trees. At the same time, since the power plant cooling water does not need to be cooled through the cooling tower, the cooling water evaporation loss is reduced, and the annual water saving is about 900,000 tons.

Contract energy management + system integration services become the new darling of energy-saving emission reduction market

Zhao Fusheng, spokesperson and deputy general manager of Shields (Tianjin) Energy Saving System Co., Ltd., said that the contract energy management model utilizes a market-based mechanism to enable energy-consuming companies to increase energy efficiency, reduce emissions, save costs, and share Energy-saving benefits; government departments have reduced the pressure for energy conservation and emission reduction, and people’s livelihood investment; people have enjoyed the clear water and blue sky brought by energy conservation and emission reduction. Due to the multi-win-win situation, contract energy management has gradually become an important mode of operation of the domestic energy-saving emission reduction market.

However, many energy-consuming companies still have some misunderstandings about energy conservation. They believe that energy-saving and emission-reduction are mainly equipment upgrades or technological alternatives, but they do not realize the importance of energy management in the process of energy conservation. In fact, energy conservation is a systematic project. Only by considering the optimization design and optimization of each link of the system can we achieve the best results of overall energy conservation. This is the advantage of professional energy conservation service companies. Zhao Fusheng stated that Dunan Energy Conservation will apply the concept of system integration to energy-saving services in an innovative way. According to the customer's characteristics and needs, it will integrate the advanced energy-saving technologies at home and abroad to provide customers with customized energy-saving system solutions and provide energy-saving audits. , project design, project financing, equipment procurement, engineering construction, operation management, and a set of integrated system integration services, so that energy-consuming companies can import the best energy-saving technologies and services without investing large sums of money. According to the agreed sharing of energy-saving benefits, after the end of the contract, all the equipment and technologies invested will be given to the energy-consuming enterprises free of charge, so as to create the best economic, social, and environmental benefits for the customers and achieve true multi-win-win situation. According to the author's understanding, Dunan Energy has rapidly won the favor of local governments and energy-consuming enterprises with the contract energy management + system integration service innovation model, including Huaneng, Guodian and other power companies have cooperation with Dunan, only 2012 1- In July, the company received more than 3.5 billion yuan in orders, establishing its leading position in China's energy-saving service industry.

During the period of the 12th Five-Year Plan, the energy-saving and consumption-reduction of power companies is imperative, and there is a long way to go. For the sake of sustainable development of the country, society, and economy, in order to leave a beautiful blue sky and clear water for our children and grandchildren, energy conservation and emission reduction requires the joint efforts of governments, power companies, energy conservation service companies, and the entire society.