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The heating technology in the South has matured. When can the South supply heating

The heating technology in the South has matured. When can the South supply heating

As some cities in the North began central heating one after another, the reporter found that people in the South have heating in winter, and some cities are making exploration according to local conditions.

Heating in some cities in the South

'for a house of more than 80 square meters, the heating cost is more than 1700 yuan after three months, which is more comfortable than air conditioning. The air conditioner is too dry for heating. When you get out of the room, you stamp your feet. " Speaking of the benefits of heating, Han Yonghong, who lives in Luyang District, Hefei, opened the conversation. In her lakeside home community, only more than 300 households opened heating in 2008, and now it has increased to more than 700 households.

Hefei is located in the south of the Huaihe River and the north of the Yangtze River. It does not belong to China's traditional central heating area. However, in recent years, with the improvement of people's living standards, the number of residential households with central heating in Hefei has increased significantly.

Wang Lei, director of the Municipal Public Administration Office of Hefei Urban Rural Development Bureau, introduced that at present, Hefei thermal power group accounts for the highest proportion of cogeneration heating. This part of heating mainly focuses on the clean utilization of coal, covering 115000 households, followed by decentralized natural gas wall mounted furnace heating and new energy heating such as ground source heat pump.

In the middle of China's territory, the 'Qinling Huaihe River' stretching more than 2000 kilometers runs from east to west and is divided into North and south. To the south of this line, the orange forest is still green in winter; To the north of this line, trees wither in late autumn. At present, China is bounded by 'Qinling Huaihe River', and the northern region is a central heating area.

Xin Rong, deputy chief engineer of Shaanxi Institute of urban and rural planning, design and research, said that according to the current specifications, China's heating areas generally refer to North China, northeast and northwest areas where the average monthly temperature is less than or equal to 5 ℃ for more than 90 days in a year, and the south does not belong to the heating area.

"There is a lot of rain in winter in the south, and the air humidity is high. The indoor room temperature is often as low as 10 degrees Celsius. In case of snow, the temperature is often as low as zero degrees Celsius, which is hard to endure." She said that with the improvement of people's living standards, the demand for heating in the south is becoming more and more obvious, and more and more southern cities are also making active efforts to respond to the voice of the people.

Facing the three 'difficulties' directly, we can't copy them

The reporter's visit and investigation found that some southern cities are exploring measures according to local conditions to provide heating for the people: in March 2017, Hangzhou, Zhejiang launched natural gas household heating service, users can freely set the heating duration and temperature, and the heat can be measured separately; Yangzhou, Jiangsu Province will strengthen the construction of heating pipe network, and many residential areas such as Fenghuang Shuian, which is located in the thin West Lake scenic spot, will realize central heating & hellip& hellip;

In Binhu New Area of Hefei, a multi energy complementary regional energy project with an energy supply area of 5 million square meters is under intensive construction. Gao Yongjun, deputy general manager of Hefei thermal power group, introduced that the project adopts multi energy complementary energy utilization methods such as ground source heat pump and sewage source heat pump, which is green, environmentally friendly and has a longer service life, which helps to alleviate the pressure of urban energy supply.

Many experts interviewed said that the central heating mode of northern cities cannot be copied for heating in the south, and flexible exploration must be carried out according to local conditions in full combination with the climatic characteristics, resource endowment, architectural characteristics and other factors in the south.

Xin Rong said that the difficulties to be solved in heating in the South mainly include three difficult problems: economic feasibility, energy security and building energy consumption. Southern heating has the characteristics of short heating period, small heat load and large load fluctuation. The large-scale implementation of heating will cause great economic pressure on the local government. In addition, thermal insulation and energy conservation are not considered in urban buildings in the south, and the energy consumption of heating buildings is high.

"There are large regional differences in the south. In view of the heating problem, we must adapt measures to local conditions and adopt more scientific, reasonable and flexible ways to solve the heating problem in winter in the south." Xie Yingxia, former vice president of China urban planning and Design Institute, said.

Pay attention to science, rationality and flexibility, and the key lies in adjusting measures to local conditions

The key to let the people in the South spend the winter warm is to adjust measures to local conditions, and the methods are scientific, reasonable and flexible.

Xie Yingxia said that thermal insulation and energy conservation are not considered in urban buildings in the south. Heating buildings consume a lot of energy, and the large-scale implementation of heating costs a lot of money; The indoor and outdoor temperature difference in the south is smaller than that in the north, and there is a large difference in heating demand among households, so it is more suitable for decentralized heating.

She said that in urban areas with concentrated population, centralized and unified heating can be explored. However, for some residential areas where the municipal central heating pipeline cannot reach, it is more suitable for distributed energy central heating.

Many experts said that cities with needs and conditions can 'pry' central heating through market leverage.

"Carry out central heating in local areas with sufficient conditions and strong demand." Fang Zhen, vice president of China Urban Heating Association and chairman of Hefei thermal power group, suggested that there is still a lot of surplus after the steam produced by the thermal power plant is used for power generation. We can consider using these heat energy for central heating in suitable areas. In this way, the energy efficiency of the thermal power plant will also be greatly improved.

Fang Zhen said that the central heating in Hefei is characterized by the development of cogeneration and central heating, which not only covers the central heating of urban residents, but also widely involves urban industrial and commercial steam, avoiding the waste of resources caused by the short heating period.

Experts believe that from the current exploration and practice in some cities, the central heating in the south is technically mature, but it still needs to be demonstrated and arranged according to the local economic and energy conditions. At the same time, southern cities are encouraged to explore a variety of heating modes that meet local climate conditions and are more energy-saving and environment-friendly, so that people in the South can spend the winter warm.

(source: Xinhua News Agency)