Jinan, Shandong Province began to try out "centralized cooling"

Jinan, Shandong Province began to try out "centralized cooling"

Jinan, Shandong Province began to try out "centralized cooling". It is worth mentioning that a pipe network system is used for cooling in summer and heating in winter. By changing the roles of "heat exchange station" and "cold exchange station", the "heating" or "cooling" mode is switched. Jinan, Shandong Province began to try out "centralized cooling".

Recently, Jinan, Shandong Province began to try out "centralized cooling" 1, and the continuous high temperature days made air conditioning an indispensable "life-prolonging" equipment in summer. Jinan, on the other hand, makes everyone feel the coolness of summer in another way. That is-centralized refrigeration.

Since the trial operation last year, the centralized cooling mode covered by Jinan CBD has covered nearly 265,438+100,000 square meters of users. The whole project adopts the same set of municipal pipe network, which is warm in winter and cool in summer.

The staff of a hotel said that the room temperature can be kept at around 26℃ without air conditioning, and the effect is very good.

In this regard, netizens questioned: Is this refrigeration mode more cost-effective than air conditioning? Do I have to pay the cooling fee in the future summer?

For the questions that everyone pays attention to and comments on, the latest answers are all here!

Question 1: Is it cheaper than ordinary air conditioners?

A: At present, the main service formats of the centralized cooling project in Jinan CBD area are public users such as office buildings, hotels and commercial complexes in the area. The cooling fee is settled by hanging tables, and the cooling fee is settled according to the cooling quantity. Users will incur expenses when using it, but will not incur expenses when not using it.

Compared with self-built air-conditioning equipment, users in this format adopt centralized cooling, which not only reduces the occupation of the computer room and the top of the cooling tower, but also reduces the power capacity increase fee of air-conditioning refrigeration in buildings, and there is no hanging-up of air conditioners. According to the analysis of actual operation data, the construction and use cost of centralized cooling for super high-rise buildings over 200 meters is lower than that of buildings using air conditioning units alone, which is equivalent to that of ordinary commercial buildings.

(Later, Jinan Energy Group will also launch centralized cooling service for high-end residential users. Considering the comfort and economy of residents' users, it will take two forms: charging by area or charging by hanging table cooling capacity, and the later pricing standard will follow the principle of not higher than that of public users to provide residents with cooling service in summer).

Question 2: Are there any water droplets in the pipeline?

Answer: In summer, cold water will inevitably lead to condensation on the pipe wall. In view of this phenomenon, good pipeline insulation measures are generally adopted to reduce the occurrence of condensation. If the user's room is in the form of radiator or floor heating, it is not suitable for refrigeration equipment at present. The terminal cooling device is generally a fan coil. The fan coil has its own condensed water collection system, which discharges the condensed water outside the building without affecting the user experience.

Question 3: In terms of energy conservation and emission reduction, how to achieve carbon dioxide emission reduction?

Answer: The refrigeration equipment at the customer end is all concentrated in the construction of the energy center, which reduces the scale of refrigeration units in individual buildings in summer. There are no refrigeration facilities such as cooling towers and air conditioning units at the customer end, which reduces the occupation of the building machine room and the noise pollution of the equipment. On the other hand, it saves the overall investment of the building, reduces the capacity expansion of power distribution, improves the overall quality of the building and has a beautiful appearance.

Every household should emit "carbon" in life. In household electricity consumption, the carbon dioxide emission (kg) is equal to the electricity consumption multiplied by 0.785. For fossil fuel thermal power units, using 100 kWh is equivalent to emitting about 78.5 kilograms of carbon dioxide. With the implementation of this project, on the one hand, the installed capacity of central refrigeration equipment is much lower than the sum of self-built refrigeration equipment, on the other hand, the high-efficiency energy-saving units used for central refrigeration are more efficient, thus achieving carbon dioxide emission reduction.

Question 4: Can I adjust the temperature manually?

A: At present, the terminal cooling facilities of users are all in the form of fan coil units. This device comes with a temperature control panel, so users can adjust the indoor temperature independently according to their own needs to meet the cooling needs.

Jinan, Shandong Province began to try out "centralized cooling". In the snowy winter, central heating makes people feel "warm as spring". In hot summer, if central cooling can be realized like central heating, the "happiness index" in dog days may be greatly improved. In fact, the trial operation of centralized cooling mode has started in Jinan CBD area, which has covered about 265,438+100000 square meters of public users such as shopping malls and office buildings in this area. Some hotel staff said that the room temperature can be kept at around 26℃ without air conditioning indoors, and the effect is very good.

It is worth mentioning that summer cooling and winter heating * * * use a pipe network system, and switch between heating and cooling modes by changing the roles of "heat exchange station" and "cold station".

In the future, central cooling service is expected to enter the homes of residential users.

It is estimated that 500,000 square meters of cooling area will be put into operation next year.

In Longhu Tianjie, located on Olympic Sports West Road, the room is cool and comfortable. Cold air comes from the air outlet at the top of the mall and can be adjusted through the control panel on the wall. The seemingly "bland" cooling system is actually "hidden mystery". The air conditioning in this shopping mall comes from "centralized refrigeration" instead of air conditioning. The "cold source" it uses is the Southern Energy Center several kilometers away.

Southern Energy Center is built by Jinan Energy Investment Holding Group, a subsidiary of Jinan Energy Group, which provides central heating and cooling services for the whole Jinan CBD area. Cui Yue, Party Secretary, Chairman and General Manager of Shandong Ruiguan Electric Power Thermal Power Co., Ltd., a subsidiary of Jinan Energy Group, introduced that the energy center has covered a refrigeration area of about 265,438+10,000 square meters, and its main service targets are public users such as office buildings, office buildings and commercial complexes in CBD area.

With the acceleration of the construction of Jinan Central Business District, more buildings, including the five super-high-rise buildings of "Mountain, Spring, Lake, River and City", will be put into use one after another after next summer. At present, the cooling area of all cooling projects in CBD that have been signed with Nengtou Group is 165438+ 10,000 square meters, and it is estimated that the cooling area will be 500,000 square meters next year. In addition to the southern energy center that has been put into use, the northern energy center will be put into use according to the cooling demand of the CBD in the future.

"These two energy centers mainly undertake the task of cooling 2.2 million square meters of public users in the whole CBD area in summer, and the heating area in the whole area in winter is about 7 million square meters. Energy Investment Group has reached a consensus with government departments through the previous planning. Starting from the graphic review stage of the entire CBD construction, we will do a good job in connecting the whole area with the next municipal pipe network. " Cui Wei said.

"Water cooling" is used for cooling, and the same casing network is used for heating.

According to Cui Yue, the central cooling and heating system of Southern Energy Center is the same pipe network system, which is the largest in the field of cold and heat supply in northern China. "Our organization estimates that after the cooling area of the whole project reaches 2.2 million square meters, it can reduce about 6.5438+0.2 million tons of carbon dioxide emissions every year, which is equivalent to about 6.5438+0.8 million households' carbon emissions generated by air conditioning and refrigeration in summer." Cui Wei said.

Specifically, thermal power units that use fossil fuels use electricity 100 kwh, which is equivalent to about 78.5 kilograms of carbon dioxide. For centralized cooling projects, on the one hand, the installed capacity of centralized cooling equipment is much lower than the sum of self-built cooling equipment, on the other hand, the efficiency of high-efficiency energy-saving units used in centralized cooling is higher, thus achieving carbon dioxide emission reduction.

The same casing network system can undoubtedly save repeated construction costs and space resources. So, how to switch between "cooling" and "heating" modes? In fact, the medium in the pipe network is always water, and cooling or heating depends on the water temperature. During heating in winter, the waste heat of Zhangqiu Power Plant transports hot water to CBD area through long-distance pipe network, and then enters the terminal systems of users through heat exchange stations, such as radiators and floor heating.

When central cooling is provided in summer, the heat exchange station in winter becomes a cold heat exchange station. After the transmission and distribution network is switched to the "cold source" of the Southern Energy Center, the chilled water is delivered to the cold exchange station. After cold exchange, the chilled water at 7-9 degrees Celsius is delivered to the terminal air tray system of all public users.

At present, Jinan Energy Investment Group is upgrading the ice storage system of Southern Energy Center. After completion, low-temperature electricity at night can be used as a low-temperature cold source, which further reduces the operating cost and conforms to the development strategy of shifting peaks and filling valleys.

"In the next step, we will focus on Jinan Central Business District, promote the idea of crossing Jingshi Road in the south, Industrial South Road in North Vietnam, Shanxi area in Maoling in the west and Jinan High-tech Comprehensive Business District in the east, and expand the promotion of centralized cooling business by the group company." Cui Wei said.

Residential users are expected to use central cooling in the future.

It is understood that since the 1980s, some foreign commercial buildings and university campuses have successively adopted the district cooling mode, such as the French CBD in La Dé fense. At present, Shenzhen Qianhai, Guangzhou University Town, Beijing Zhongguancun and other business districts have also begun to adopt centralized cooling mode.

For users of office buildings, hotels, commercial complexes and other public buildings, compared with self-built air-conditioning equipment, centralized cooling not only reduces the space occupied by the computer room and the roof of the cooling tower, but also reduces the power capacity of air-conditioning refrigeration in the building, and there is no need to hang air conditioners. According to the analysis of actual operation data, the construction and use cost of central cooling is lower than that of a single air-conditioning unit in a super-high-rise building with a height of more than 200 meters, and similar to that of a general commercial building.

According to reports, at present, the terminal cooling equipment for centralized cooling is generally fan coil equipment, and the fan coil has its own condensed water collection system to discharge condensed water outside the building to avoid affecting the user experience. At the same time, the equipment comes with a temperature control panel, so users can adjust the indoor temperature independently according to their own needs. If the user's room is in the form of radiator or floor heating, it is temporarily not suitable for use as refrigeration equipment.

Can central cooling cover residential users in the future? It is understood that Jinan Energy Investment Group will also promote centralized cooling service for high-end residential users. In terms of charging, considering the comfort and economy of residents' users, the charging method will take two forms: charging by area or charging by cooling capacity of hanging meters, and the later pricing standard will follow the principle of not being higher than that of public users to provide residents with cooling services in summer.

Jinan, Shandong Province began to try out "centralized cooling" 3 Qilu Net Lightning News July 15. In the hot summer, the temperature continues to be high. However, a newly opened hotel in the CBD area of Jinan has not installed central air conditioning, but the indoor temperature of the hotel remains cool and comfortable, all thanks to the centralized cooling mode covered by the CBD area.

Zhang Zihao, a staff member of Yaduo S Hotel, Shandong Port Building, Jinan CBD, said that according to the feedback from the guests, the cooling speed is very fast, and the effect is very good, and the centralized cooling can greatly reduce the labor cost and maintenance cost.

The same bushing network provides cooling in summer and heating in winter.

At present, it has covered nearly 2 1 1,000 square meters of users.

According to reports, Jinan's centralized cooling mode in the CBD area with concentrated business has covered nearly 2 1 10,000 square meters of users since its trial operation last year. The whole project adopts the same set of municipal pipe network, which is warm in winter and cold in summer. The north and south energy centers are mutually cold sources, and the heat exchange stations are in the same position. Through cold exchange, the cold source is delivered to the terminal equipment of each public user.

"In winter, the water supply temperature we deliver to the heat exchange station is about 90 degrees Celsius, which is adjusted downward or upward according to the specific temperature. In summer, the chilled water of about 7 degrees Celsius will be transported to the cold station, and the chilled water of about 7-9 degrees Celsius will be replaced by the principle of cold exchange and transported to the user's terminal air tray system to meet the user's cooling needs in summer. " Cui Yue, chairman of Shandong Ruiguan, an energy investment group under Jinan Energy Group, said that water is a very stable and commonly used heating and cooling medium, which is more suitable for large-scale regional central heating and cooling.

Cui Yue said, "We have adopted refrigeration and heating systems in the northern cities of China. At present, the north of China is the largest area. Our organization estimates that after the cooling area of the whole project reaches 2.2 million square meters, the annual carbon dioxide emission can be reduced by about 6,543.8+0.2 million tons, which is equivalent to about 6,543.8+0./kloc-0.0/10,000 households' carbon emissions generated by air conditioning and refrigeration in summer. By laying cold and warm water supply pipe network, we have saved the limited space resources of urban roads to the maximum extent. "

At present, Jinan Energy Group is upgrading the ice storage system of Southern Energy Center. After completion, low-temperature electricity at night can be used as a low-temperature cold source, which further reduces the operating cost and conforms to the development strategy of shifting peaks and filling valleys.

Suitable for commercial gathering areas.

Promote residential users in the future

At present, most areas where domestic cities use centralized cooling mode are located in business districts with high commercial density, such as Shenzhen Qianhai, Guangzhou University Town and Beijing Zhongguancun. It is reported that all three districts in Shenzhen Qianhai area achieved cooling coverage last year. After the project is completed, it will provide cold source service for 6,543,809 square meters of office buildings, businesses, hotels, schools and other public buildings in Qianhai Shenzhen-Hong Kong Cooperation Zone.

Cui Wei introduced that from the feedback of users who use centralized cooling in this residential area, the effect is good. "From the initial stage of operation to the present, users have a process of gradual cognition, just like when Jinan began central heating in the early 1990 s, users gradually understood."

At present, with the acceleration of the construction of the whole Jinan CBD area, Jinan CBD area has determined the access area of165438+100000 square meters for centralized cooling, including five super high-rise buildings, including mountains, rivers, lakes, springs and cities. At the same time, Jinan Energy Group will learn from the successful experience of centralized cooling in Jinan CBD area and gradually extend this model to Jinan and even other parts of the country.