scope of application

Geothermal energy utilization, regional cooling and heating, energy conservation and environmental protection

Technology provider

Yangtze River Survey, Planning, Design and Research Co., Ltd.

Brief description of technology

Water is taken from rivers through water intake facilities and sent to the air-conditioning mainframe (heat pump or chiller). The air-conditioning mainframe consumes part of the electrical energy to produce air-conditioning hot and cold water that meets the requirements, providing air-conditioning services for energy-using buildings in the area. After heat exchange, only the temperature of the river water changes, and the flow rate is not lost. After heat exchange, it can be returned to the river, or according to comprehensive planning needs, it can provide industrial, agricultural and domestic water for the area, or provide ecological replenishment to improve the water ecology and water environment.

technical information

This technology is a systematic project, including: river water intake and withdrawal system and civil engineering, river water source heat pump system, power supply and distribution system, automatic control system, energy station building civil engineering, outdoor transmission and distribution water pipe network, etc.

Commercial applications

Hankou Binjiang International Business District River Source Renewable Energy Station Demonstration Project Location: Wuhan Energy Supply Area: 2.1 million square meters; Chongqing City River Source Heat Pump Centralized Cooling and Heating Project Location: Chongqing Energy Supply Area: 4 million square meters; Nanjing International Service Outsourcing Industrial Park River Source Heat Pump Regional Energy Center Project Location: Nanjing Energy Supply Area: 2.31 million square meters.

Help/support you hope to receive during the technology transfer process

It is hoped to obtain policy support from the local government where the project is located and make regional centralized cooling and heating supply a prerequisite for district development to facilitate the advancement of the project; at the same time, it is hoped to be recommended by my country's government to contribute to energy conservation and emission reduction in the Belt and Road countries.

equipment investment

Taking the Jiangshuiyuan Renewable Energy Station Demonstration Project in Hankou Binjiang International Business District as an example, the energy supply range is 2.1085 million square meters, including 229,900 square meters of commercial area and 72,100 square meters of public cultural area. Office buildings are 1.8065 million square meters. The design service life of the station building structure is 50 years, and the design service life of the equipment is 25 years. The main equipment mainly uses this technology for project construction investment (excluding value-added tax) of 519.5001 million yuan. The construction scope of this project includes: river water intake and withdrawal system and civil engineering, river water source heat pump system, power supply and distribution system, automatic control system, energy station building civil engineering, outdoor public transmission and distribution water pipe network system and other auxiliary facilities. The project construction investment (including value-added tax) was 580.6364 million yuan, including 511.2839 million yuan in engineering expenses, 47.0203 million yuan in other construction expenses, and 22.3322 million yuan in preparatory expenses.

Annual operation and maintenance fee

Taking the Jiangshuiyuan Renewable Energy Station Demonstration Project in Hankou Binjiang International Business District as an example, the energy supply range is 2.1085 million square meters. The normal operation of the system mainly consumes electricity and water replenishment from the air conditioning system. (1) Electricity bill: The annual electricity bill for normal operation is about 25.0761 million yuan (excluding tax). (2) Water fee: The annual water fee for normal operation is 66,200 yuan (excluding tax). (3) Wages and welfare expenses for operating personnel. According to the scale of the Jiangshuiyuan Renewable Energy Station Demonstration Project in Hankou Binjiang International Business District, a total of 22 people are needed for the operation of the energy station. The average annual salary and welfare expenses during the calculation period are 100,000 yuan/person. The salary and welfare expenses of operating personnel in normal operation years The total amount is 2.2 million yuan/year.

investment recovery period

The internal rate of return on capital of the Jiangshuiyuan Renewable Energy Station Demonstration Project in Hankou Binjiang International Business District is 14.13%. When the benchmark rate of return is 8%, the financial net present value after income tax is 66.4142 million yuan; the financial net present value before income tax is 149.5422 million yuan, the investment payback period is 9.78 years, and the financial internal rate of return is 12.18%. The total investment rate of return is 6.78%, and the net profit rate of capital is 13.54%.

added benefit

According to calculations, the energy station has obvious emission reduction benefits. Compared with traditional forms of air conditioning, it saves 7374 tons of standard coal and reduces CO2 emissions by 18140 tons every year after reaching production capacity, which can generate carbon trading benefits.

comprehensive benefits

Compared with traditional split air conditioning technology, the Jiangshui source area cooling and heating technology saves about 30% energy; it can reduce the installed capacity of air conditioning and power distribution; at the same time, it is combined with the deployment of air conditioning energy storage technology to reduce the peak value of urban power grids and reduce the load pressure of the power grid; The tail water of the energy station can provide industrial, agricultural and domestic water for the area, or provide ecological replenishment, improve the aquatic ecological and water environment, and has good social and environmental benefits. Take the Jiangshui Source Renewable Energy Station in Hankou International Binjiang Business District undertaken by us as an example. Its energy supply scale is 2.1 million square meters of public buildings. It adopts Jiangshui Source Regional Cooling and Heating Technology to live in the environment and reduce waste of social resources. The energy station has obvious emission reduction benefits. After reaching production capacity, it saves 7374 tons of standard coal, reduces CO2 emissions by 18140 tons, reduces SO2 emissions by 253 tons, and reduces NOx emissions by 59 tons every year.

Level of impact of obstacles on technology transfer

no

technology maturity

The river water source area cooling and heating technology uses river water as a cold and hot source to expel heat into the river water in summer and extract heat from the river water in winter. It uses heat pump technology to produce air-conditioning cold and hot water to uniformly provide air-conditioning services for energy-using buildings in the area. Because both its summer heat removal and winter heat extraction come from river water, the heat island effect and winter microclimate in the region have been improved. The adoption of an energy station system and considering the simultaneous utilization factor of air conditioners of different business formats in the area can reduce the installed capacity of air conditioners and power distribution capacity in the area; at the same time, combined with the deployment of air conditioning energy storage technology, the peak value of urban power grids can be reduced and the load pressure on the power grid can be reduced. Regional cooling and heating technology in river source areas is widely used in the Yangtze River Basin. For example, there are cases in Chongqing, Changsha, Nanjing, Shanghai and other cities. The energy supply building area is more than 2 million square meters. The operation effect is good and it is a very mature and complete technology. The equipment used: air conditioning mainframe, water pump, plate heat exchanger, etc. are all mature products with long-term operation cases.

technical applicability

Jiangshui source regional cooling and heating technology is suitable for building air conditioning cooling and heating in large areas. The scale of energy supply should be limited by the amount of river resources, and the scale of energy supply should be avoided, causing the water temperature of the river to change beyond the specified value; the water intake point is affected by river bed evolution and sediment sedimentation, and special demonstrations should be carried out; the lowest water temperature of the river in winter affects the system's process route. If the river temperature is too low, it is necessary to consider setting up a backup heat source; the promotion of this technology is not suitable for areas where there is no need for cooling and heating.

technical stability

The cooling and heating technology in the river source area is operating stably. There are more than 8 years of operating experience in China. The operation is stable and the benefits of energy conservation and environmental protection are significant. The impact of noise generated during operation can be dealt with through sound insulation and noise reduction measures; the impact on river water temperature can be demonstrated through warm drainage and cold drainage, and the water intake scale of energy stations can be reasonably set to keep the temperature rise and temperature drop of river water within the allowable range.

technical safety

The river water source area cooling and heating technology uses conventional air conditioning, heat pump and chiller units. River water is not used to extract heat, and there is no risk of secondary pollution, environmental and safety accidents. From the perspective of safe and stable operation of the system, the operation and maintenance management of the energy station should be the responsibility of professional operation and maintenance personnel to achieve efficient and energy-saving operation of the system.

Barriers to technology transfer and promotion

no

intellectual property transfer

It has domestic independent intellectual property rights; the equipment used in this technology has mature products at home and abroad; we are very willing to provide technical services to countries in the Belt and Road Initiative.