-- Various central heating methods

Central heating is the hot water or steam generated by the central heat source as the heat medium, through the heat network to the production, heating and domestic heat users in a town or a larger region. Central heating has the advantages of large heat load, large heat source scale, high thermal efficiency, saving fuel and labor, and less floor space. Central heating systems can be classified as follows:

The vast majority of urban heating in our country is mainly to ensure urban winter heating, and only a small part is used for domestic hot water supply, and even less is used for summer cooling. And urban heating has gradually expanded from northern cities to southern markets. All regions are trying to start from the existing conditions, actively adjust the energy structure, research diversified heating methods, and achieve sustainable development of heating industry.

In addition, the state has issued a number of policies to promote cogeneration central heating. In 2021, The State Council issued the "Guiding Opinions on Accelerating the Establishment of a sound Green Low-carbon Circular Development Economic System" (Guofa (2021) No. 4), proposing to actively develop clean cogeneration central heating in northern counties and steadily promote biomass coupled heating.

-- Shandong Province and Hebei Province rank first in the country in terms of overall urban district heating area

According to the central heating area of various provinces and cities in 2021 announced by the Ministry of Housing and Urban-Rural Development, the central heating area in Northeast China is larger, and the central heating area in Shandong Province is the largest, reaching 1,728.59 million square meters. Yunnan and Sichuan in the southwest have smaller central heating areas of 1.15 million square meters and 190,000 square meters, respectively.

Analysis of cogeneration central heating

Cogeneration central heating has the advantage of energy saving, but the construction period is longer

Cogeneration central heating is a main way of urban central heating, the main purpose is to save energy, is a recognized energy saving and environmental protection technology. Compared with other district heating methods, cogeneration usually requires more investment and a longer construction cycle.

-- Cogeneration has become the main form of central heating in China

China has a variety of heating methods, mainly including cogeneration, regional boilers, distributed boilers, electric film, heat pump technology, etc., has gradually formed a heat supply situation based on cogeneration, supplemented by centralized boiler rooms and supplemented by other advanced and efficient ways. According to the statistics of the Ministry of Housing and Construction, in the total amount of urban central heating in 2021, cogeneration heating accounts for the main part, accounting for about 67% of the total central heating.

-- Hot water central heating is the main method of cogeneration central heating

The central heating methods of thermal power plants can be divided into steam heating and hot water heating. According to the data released by the Ministry of Housing and Urban-Rural Development, the main way of urban central heating in China's thermal power plants in 2021 is hot water central heating, the total heat supply reaches 2,030.57 million GW, accounting for 77% of the total heat supply of thermal power plants, and the steam central heating of thermal power plants reaches 601.9 million GW. It accounts for 23% of the total central heating of thermal power plants.