Can "concentrate cool" be promoted vigorously?

Concentrated supply of cold and heating has the characteristics of intensive land, peak peaks, high -efficiency energy saving, intelligent management and control, and avoiding repeated investment. It is particularly suitable for promotion and application in high -density concentration in commercial buildings such as cbd cbd. It should be pointed out that this model is not suitable for all energy scenarios, and its promotion and application should also conduct scientific solution demonstration and system design.

"Concentrated heating" knows, but have you heard of "concentrated supply of cold"? Recently, the topic of "concentration of cold" in Jinan, Shandong has attracted attention.

Wang Chenfu, deputy director of the Jinan Central Business District (Jinan CBD) Management Committee, told reporters that starting this year, the trial operation of this area has concentrated the cooling mode. It has now covered the office buildings, hotels, commercial complexes and other public construction users in the area nearly 21 Ten thousand square meters. The entire project adopts the same set of municipal pipe networks, which is heated in winter and cooling in summer.

"The indoor is maintained at about 26 ° C, the effect is very good. The cold fee is settled at the cooling amount, and the meter is measured. If there is no fee without any fees, it is worry -free and money." Zhang Zihao, the comprehensive department of the management company.

Concentrated cooling can also adjust the temperature manually. According to reports, the end -of -the -end cold facilities of the CBD area of ​​the Jinan CBD area are all in the form of a fan. This kind of device comes with a temperature control panel. Users can autonomously adjust the indoor temperature according to the needs.

Jinan Energy Group's Jinan Energy Investment Group Shandong Ruiguan Energy Thermal Co., Ltd. Party branch secretary, chairman and general manager Cui Yan introduced that the same set of transmission and distribution pipeline networks in summer concentrated cooling and winter concentrated heating, just switch to the cold source Send the cold media of about 7 degrees Celsius as a refrigerant to the cooling station at the same location as the heat exchanging heat exchanges in winter at the same location. Use the cold exchange principle to replace the frozen water with 7 degrees Celsius to about 9 degrees Celsius, and enter the user's end wind tray system to meet the summer cooling needs.

Zhang Xueqian, deputy secretary and general manager of Jinan Energy Investment Group, told reporters that in May 2017, the Shandong Provincial Government and the Jinan Municipal Government invited many cities at home and abroad to participate in the planning and design of Jinan CBD, and compiled the "Jinan CBD City Design and Guide "The", stipulates that the area is based on the original concentrated heating of Jinan City, and the regional centralized supply is used at the same time.

"Jinan CBD's architectural type is suitable for regional supply." Zhang Xueqian told reporters that when Jinan CBD is planned in urban planning, it is clear that the area is a commercial agglomeration area. Important prerequisites for developing regional energy projects.

What are the advantages of concentrated cold supply? Li Gang, chief engineer of Tongyuan Design Group, who has participated in the pre -concentrated concentration of cold supply, introduced that regional concentrated supply of cold and heating has intensive land, peak peaks, efficient energy saving, intelligent management and control, effectively avoiding repeated investment, etc. The characteristics are especially suitable for the high -density concentration of commercial buildings such as urban CBDs. This model can use different functional commercial buildings with different characteristics of peak time. Through reasonable design, while reducing the total installation capacity, it improves system economy and ensures security and stability. In addition, in conjunction with the design of the ice storage and water storage system, the peak valley power difference can be used to save the peak adjustment, which not only reduces the operating cost of the system, but also realizes the peak -cutting valley of the grid.

"Analysis of actual operation data shows that for ultra -high -rise buildings above 200 meters, the cost of concentrated cold supply and use is lower than the cost of the air -conditioning units alone; for general commercial buildings, the construction and use costs of the two are equivalent." According to the introduction, for buildings with high building density and high -cold demand, the cooling energy is much higher than ordinary air conditioners because of large advanced and efficient cold water units. The cost is lower than that of each building. However, for areas of low -density commercial buildings or irregular demand, the independent air -conditioning system of the building is relatively flexible, and its construction and use costs are generally lower than concentrated supply of cold supply.

According to reports, regional cooling technology has been valued by many countries due to its high efficiency and less environmental impact. Some commercial gathering areas in Europe, commercial buildings in some big cities in Japan, and many university campuses in the United States adopt this region to cool down. my country ’s Guangzhou University Town, Shenzhen Qianhai, Shanghai Hongqiao, Beijing Zhongguancun Science and Technology Park and other areas have also adopted regional cooling methods and have been put into operation.

Can the concentrated supply of cold supply be vigorously promoted? "This model is not suitable for all energy scenarios, and its promotion and application should also conduct scientific solution demonstration and system design." Li Gang believes that which kind of cooling and heating mode should be used. Regional energy planning, from the demand -side scientific analysis projects and system applicability, conduct overall planning and overall calculation of load simulation, digital twin and other means; second, the equipment energy efficiency should be improved as much as possible to reduce unnecessary transmission and distribution loss consumption. , Use renewable energy for local conditions to improve the intelligence level of operation management; in the end, we should also coordinate system equipment procurement installation and load requirements, gradually improve coordination and adaptation, and avoid premature capital investment. "Only through scientific planning, fine design, coordinated coordination, and smart operation and maintenance can we give full play to the advantages of regional concentration of cooling and heating, and achieve the goal of low -carbon energy saving, green environmental protection, and safe economy." Li Gang said. (Source: Economic Daily)

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