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HDPE ground source heat pump pipe
Bailian Ground Source Heat Pump PE Pipe Ground Source Heat Pump Optimal Pipe Material Bailian Company's ground source heat pump pipe production equipm
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Bailian Ground Source Heat PumpPEpipe Optimal selection of pipes for ground source heat pumps
Bailian Company's ground source heat pump tube production equipment adopts an internationally advanced polyethylene pipe extrusion production line, with a unique basket type head design, advanced barrier type screws, andIKVForced feeding and extrusion system to ensure full melting and plasticization of raw materials. This ensures that polyethylene pipes have excellent resistance to slow crack growth and rapid crack propagation during use. Meanwhile, the production line is equipped withFLXUltrasonic scanning device, meter weight measurement control system, wall thickness monitoring controller and other fully automatic computer control systems dynamically control the product during the production process to ensure the production quality of each meter of pipe.
Granville production line
The Granville dedicated production line enjoys the reputation of being 'academic' in the world extrusion industry. It achieves low-temperature extrusion and ensures that the raw material properties are well transferred to the pipes. Comprehensive testing methods ensure the quality of every meter of pipe material.

Excellent pipe performance

Corrosion resistance -PEAs an inert material, it can withstand corrosion from various chemical media except for a few strong oxidants.
Temperature resistance - Low temperature brittleness temperature, can withstand temperatures below zero40°40Used within the temperature range of ° C, pipeline brittleness will not occur during winter construction.
Hygiene - Hygiene is non-toxic, does not breed bacteria inside the pipeline, does not cause secondary pollution of water quality, and completely solves the problem of pipeline pollution of water sources.
High resilience -PEThe elongation at break of the pipe generally exceeds500%It has strong adaptability to uneven settlement of pipe foundations and excellent seismic performance.
No leakage -PEThe pipe adopts electric melting connection, and its interface strength is higher than that of the pipe body.
Flow capacity - Smooth inner wall, low friction coefficient, reduces pressure loss and water transmission energy consumption in the pipeline.
Service life——PEThe pipeline has added carbon black components, which have strong resistance to ultraviolet radiation and can be stored and used outdoors, with a long service life50Year.

Professional system support
Baitong Company isNew energy energy-saving HVAC productsUp and in the UKDISMYCompany cooperation, always adhere to execution from beginning to endISOStandards ensure the quality of the piping system.


Advanced electric fusion welding machine.

Secure connection method

Adopting hot melt connection and electric melt connection, it is safe, reliable and leak free.


Experimental evidence shows that Baitong Ground Source Heat PumpPEThe tube has excellent peel strength performance (peel and debonding test -ISO13954Squeezing and debonding test -ISO13955

——Bailian Plastic Industry Ground Source Heat PumpPEEnsure the safe operation of ground source heat pump systems——


Introduction to Ground Source Heat Pump
Ground source heat pump is an efficient and energy-saving air conditioning system that utilizes solar and geothermal energy absorbed from shallow water sources (such as groundwater, rivers, and lakes) and soil sources on the Earth's surface, and adopts the principle of heat pump to provide both heating and cooling.
Ground source heat pumps transfer low-temperature thermal energy to high-temperature energy by inputting a small amount of high-grade energy, such as electricity. Ground energy is used as a heat source for heat pump heating in winter and a cold source for air conditioning in summer. That is, in winter, the heat in ground energy is taken out, the temperature is increased, and then supplied to indoor heating; In summer, extract indoor heat and release it underground. Usually, ground source heat pumps consume 1kW of energy, and users can obtain more than 4kW of heat or cold.Cold and heat sources
At present, ground source heat pumps have successfully utilized various water resources such as groundwater, rivers and lakes, reservoir water, seawater, urban reclaimed water, industrial wastewater, tunnel water, as well as soil sources as the cold and heat sources for water source heat pumps
Ground source heat pump form
There are two types of water source/ground source heat pumps: open and closed.
Open system: It is a heat pump system that directly utilizes a water source for heat transfer. The system needs to be equipped with devices such as anti sand blocking, anti scaling, and water purification.
Closed system:
It is a closed system that is buried deep underground in a sealed plastic pipe, injected with antifreeze, and exchanges energy with water or soil through a heat exchanger. Closed systems are not affected by factors such as groundwater level and water quality.
1. Vertical buried pipe - deep soil
Vertical buried pipes can obtain heat from deep underground soil. Vertical buried pipes are usually installed at depths of 50-150 meters underground, with one or more sets of pipes connected to a heat pump unit. The antifreeze inside the enclosed plastic pipes transfers heat energy to the heat pump, which then converts it into the heating and hot water required by the building. Vertical buried pipes are the main method of ground source heat pump systems, which have received strong support from government departments in various countries.
2. Horizontal buried pipe - surface layer of the earth
Place plastic pipes horizontally at a depth of 2 meters underground, fill them with antifreeze liquid, and connect them to a heat pump. Horizontal buried pipes occupy a large area, require a large amount of excavation, and underground heat exchangers are affected by surface climate change.
3. Surface water
The water from rivers, lakes, seas, and deep wells is collectively referred to as surface water. Ground source heat pumps can extract heat or cold from surface water to achieve heating or cooling purposes. The heat pump system using surface water has low cost and high operating efficiency, but is limited by geographical location (such as rivers, lakes, and seas) and national policies (such as deep well water extraction).
Renewability
Ground source heat pump is a heating, cooling, and air conditioning system that utilizes the solar energy resources stored on Earth as cold and heat sources for energy conversion. Ground source heat pump is a technology that utilizes clean and renewable energy. The surface soil and water bodies are a huge solar collector, collecting 47% of solar radiation energy, which is more than 500 times more than what humans use every year (underground water bodies indirectly receive solar radiation energy through soil); It is also a huge dynamic energy balance system, where the soil and water on the surface naturally maintain a relative balance between energy reception and dissipation. The success of ground source heat pump technology has made it possible to utilize the almost infinite solar or ground energy stored in it.
Efficient and energy-saving
Ground source heat pump units utilize soil or water temperatures ranging from 12-22 ℃ in winter, which are higher than the ambient air temperature. This increases the evaporation temperature of the heat pump cycle and improves the energy efficiency ratio; The temperature of soil or water in summer is 18-32 ℃, which is lower than the ambient air temperature. The condensation temperature of the refrigeration system decreases, making the cooling effect better than air-cooled and cooling tower types. The unit efficiency is greatly improved, which can save 30-40% of the operating costs of heating, cooling and air conditioning. 1KW of electricity can obtain more than 4KW of heat or more than 5KW of cooling capacity.
Compared with boiler (electric, fuel) heating systems, boiler heating can only convert more than 90% of electrical energy or 70-90% of fuel energy into heat for users to use. Therefore, ground source heat pumps save more than two-thirds of electrical energy compared to electric boiler heating and about half of energy compared to fuel boilers; Due to the relatively stable temperature of the heat source of the ground source heat pump throughout the year, generally ranging from 10 to 25 ℃, its cooling and heating coefficients can reach 3.5 to 4.4, which is about 40% higher than traditional air source heat pumps. Its operating cost is 50 to 60% of that of ordinary central air conditioning. Therefore, in the past decade, especially in the past five years, ground source heat pump air conditioning systems have achieved rapid development in North America such as the United States, Canada, and Central and Northern European countries such as Switzerland and Sweden. China's ground source heat pump market is also becoming increasingly active, and it can be expected that this technology will become the most effective heating and cooling air conditioning technology in the 21st century.
Table 1:
Comparison of energy consumption between ground source heat pumps and other heating methods:


After comparison, it can be concluded that ground source heat pumps are the most energy-efficient among all heating methods.
Table 2: Characteristics of Ground Source Heat Pump Air Conditioning Systems Compared to Traditional Central Air Conditioning Systems in Various Aspects:


Ground source heat pump air conditioning systems perform better than traditional air conditioning systems in all aspects.
Table 3:300Compared with other heating methods, the operating costs of heating and domestic hot water during the heating season for a square meter villa are as follows:
Note: The research object in Table 3 is a high-end villa in Beijing with an area of 300 square meters, using one DL-A120 unit, designed and constructed by Dalong Company. Various price parameters are taken from the "2004 Beijing Energy Utilization Report" and the "2006 Beijing Energy Utilization Report" released by relevant departments of the municipal government, with significant fluctuations in energy prices over the two years. This table is calculated based on users running for 15 hours per day during a heating season.


Significant environmental and economic benefits
When the ground source heat pump unit operates, it does not consume or pollute water, does not require boilers, cooling towers, or sites for storing fuel waste, and has significant environmental benefits. The power consumption of ground source heat pump units can also be reduced by more than 40% compared to air source heat pumps; Compared with electric heating, it can reduce more than 70%, and its heating system has an average efficiency improvement of nearly 50% compared to gas boilers, which is 75% higher than the efficiency of gas boilers.
One machine with multiple uses and wide applications
Ground source heat pump system can provide heating, air conditioning and cooling, as well as domestic hot water. It is versatile and can replace two sets of devices or systems of boiler and air conditioning, especially for buildings with simultaneous heating and cooling requirements. Ground source heat pumps have obvious advantages. Not only does it save a lot of energy, but a set of equipment can also meet the requirements of heating, cooling, and domestic water supply, reducing the initial investment of equipment. Ground source heat pumps can be applied to hotels, residential areas, apartments, factories, shopping malls, office buildings, schools, and other buildings. Small ground source heat pumps are more suitable for heating and air conditioning in villa residences.
Automatic operation
Ground source heat pump units can be designed as simple systems with fewer components, reliable operation, low maintenance costs, high degree of automatic control, and long service life due to their stable operating conditions.
Working principle of ground source heat pump:
In nature, water always flows from high to low, and heat is always transferred from high to low temperatures. People can use water pumps to pump water from low to high, achieving water flow from low to high. Heat pumps can also transfer heat from low to high temperatures. So a heat pump is essentially a device for increasing heat, which consumes very little electrical energy during operation, but can extract 4-7 times more electrical energy from environmental media (water, air, soil, etc.) to increase temperature for utilization. This is also the reason for heat pump energy conservation. Ground source heat pump is a type of heat pump technology that uses the earth or water as a cold and heat source to provide winter warmth and summer coolness for buildings. Ground source heat pump only transfers energy between the earth and indoors. Utilize minimal electricity to maintain the temperature required indoors. In winter, 1 kilowatt of electricity delivers 4-5 kilowatts of heat from soil or water sources indoors. In summer, the process is reversed as indoor heat is transferred to the soil or water by the heat pump, providing cool air indoors. The energy obtained underground will be utilized in winter. This cycle repeats itself, connecting the architectural space with nature. Obtained the most comfortable living environment at the lowest possible price.
Principle of heat pump:
The heat pump unit mainly consists of four parts: compressor, condenser, evaporator, and expansion valve. It continuously completes the thermal cycle process of liquid working fluid (refrigerant or refrigerant): evaporation (absorbing heat from the environment) → compression → condensation (releasing heat) → throttling → re evaporation, thereby transferring heat from the environment to water. Compressor: It plays a role in compressing and transporting the circulating working fluid from low temperature and low pressure to high temperature and high pressure, and is the heart of the heat pump (refrigeration) system; Evaporator: It is a device that outputs cooling capacity. Its function is to evaporate the refrigerant liquid flowing in through the throttle valve, absorb the heat of the cooled object, and achieve the purpose of refrigeration; Condenser: It is a device that outputs heat. The heat absorbed from the evaporator, along with the heat converted from the compressor's power consumption, is carried away by the cooling medium in the condenser to achieve the purpose of heating; Expansion valve or throttle valve: It has a throttling and pressure reducing effect on the circulating working fluid, and regulates the flow rate of the circulating working fluid entering the evaporator. According to the second law of thermodynamics, the work (electrical energy) consumed by the compressor acts as a compensating force, causing the circulating working fluid to continuously absorb heat from the low-temperature environment and release heat to the high-temperature environment, circulating back and forth.Classification of heat pumps
A heat pump requires heat from a condenser, while an evaporator absorbs heat from the environment. The object that takes heat from the environment is called a heat source; On the contrary, refrigeration requires the cooling capacity of the evaporator, while the condenser releases heat to the environment. At this point, the object that releases heat to the environment is called the cold source.
Evaporators and condensers are mainly divided into two forms: air heat transfer and water heat transfer, depending on the different circulating working fluids and environmental heat transfer media. Heat pumps can be classified into four types based on the different heat exchange media with the environment: water water type, water air type, air-water type, and air-to-air type. A heat pump that uses air as a cold and heat source is called an air source heat pump. Air source heat pumps have a long history and are easy to install and use, with a wide range of applications. However, due to regional differences in air temperature, the typical application range in China is south of the Yangtze River. In the North China region, the average winter temperature is below zero degrees Celsius. Air source heat pumps not only operate under harsh conditions and have poor stability, but also have low efficiency due to frosting problems. A heat pump that uses water or geothermal energy as a cold and heat source is called a ground source heat pump. Water and geothermal energy are excellent heat sources with large heat capacity and good heat transfer performance. Generally, the cooling and heating efficiency or capacity of ground source heat pumps is higher than that of air source heat pumps. However, the application of ground source heat pumps is often limited by water sources or geothermal energy.
Principle of Ground Source Heat Pump
Ground source heat pump uses water and ground energy (groundwater, soil or surface water) to exchange heat and cold as the cold and heat sources of ground source heat pump. In winter, the heat in ground energy is taken out and supplied to indoor heating, and ground energy is used as the 'heat source'; In summer, indoor heat is extracted and released into groundwater, soil, or surface water, where the ground can serve as a 'cold source'.
The left image shows an open ground source heat pump system.
  

The diagram on the right shows the principle of ground source heat pump heating in winter.


Air source, water source, soil source
Composition of Ground Source Heat Pump
The ground source heat pump heating and air conditioning system is mainly divided into three parts: outdoor ground source heat exchange system, ground source heat pump unit, and indoor heating and air conditioning terminal system. There are mainly two forms of ground source heat pump machines: water water type or water air type. The heat transfer between the three systems is carried out through water or air heat exchange medium. The heat exchange medium between the ground source heat pump and the ground energy is water, and the heat exchange medium with the building heating and air conditioning terminal can be water or air.
Development of Ground Source Heat Pump
In 1946, the first ground source heat pump system in the United States was successfully installed in the downtown area of Portland, Oregon.
In 1973, the Oklahoma City Building in the United States installed a ground source heat pump air conditioning system and conducted comprehensive system research.
In 1978, the US Department of Energy (DOE) began investing heavily in technology research and development funds for ground source heat pumps.
In 1979, the Oklahoma Department of Energy established the Ground Source Heat Pump System Technology Research and Development Foundation.
In 1987, the International Ground Source Heat Pump Association (IGSHPA) was established at the University of Aklahoma.
In 1988, the Oklahoma Department of Commerce began commercial promotion of ground source heat pumps.
In 1993, the US Environmental Protection Agency (EPA) vigorously promoted ground source heat pump systems, deepening the American public's understanding of ground source heat pumps.
In 1994, the first ground source heat pump air conditioning system was installed by the US government at Oregon State Capitol University, and ground source heat pumps have since been widely used in the US government, military, power companies, and other industries.
In 1998, the US Environmental Protection Agency (EPA) issued regulations requiring the promotion of ground source heat pump systems in buildings of federal government agencies nationwide. US President Bush also installed a ground source heat pump air conditioning system in his Texas mansion. Currently, 75% of ground source heat pump systems worldwide are installed in North America.
The United States is the world's leading producer, user, and developer of ground source heat pumps,
In 1985, 14000 ground source heat pumps were installed in the United States;
In 1997: 45000 units;
In 2000: 400000 units;
In 2004: 670000 units;
In 2005: 1000000 units.
Canada: The proportion of new ground source heat pump systems increased by 50% in 2005.
Switzerland and Norway have the highest per capita proportion of ground source heat pump applications in the world, with an application rate of up to 96%.
Austria: The application rate is 45%.
Denmark: The application rate is 35%.
Japan: It is the most advanced and widely used country in Asia for ground source heat pump technology.
In 1997, the US Department of Energy (DOE) and the Chinese Ministry of Science and Technology signed the "China US Energy Efficiency and Renewable Energy Cooperation Agreement", one of the main contents of which is the cooperation of the "Ground Source Heat Pump" project.
In 1998, several universities in China, including Chongqing Jianzhu University, Qingdao Institute of Construction Technology, Hunan University, Tongji University, etc., began to establish ground source heat pump experimental platforms to study ground source heat pump technology.
In January 2006, the Ministry of Construction of China issued the National Standard for Technical Specifications of Ground Source Heat Pump Systems Engineering.
In September 2006, Shenyang was designated by the Ministry of Construction as a pilot city for promoting ground source heat pump technology. By the end of 2010, the application area of ground source heat pump technology in the city accounted for about one-third of the total heating area.
In December 2006, the Ministry of Construction issued the document "Key Promotion Technology Fields in the Eleventh Five Year Plan". As a new and efficient renewable energy technology, water source heat pump technology has been included in the catalog.

existAmericaGround source heat pump is a mature and fully industrialized technology. Since 1994, the United States Department of Energy, National Environmental Protection Agency, Edison Electric Power Agency, Electric Power Research Center, International Ground Source Heat Pump Association, National Urban and Rural Electricity Association, and various enterprises have jointly established the Ground Source Heat Pump Association, sparing no effort to vigorously promote ground source heat pump systems.

Former US President Bush applied a ground source heat pump system on his Texas farm and repeatedly promoted the superiority of the system in public. ——See "Texas Haven - The Bush Family's Rural Residence", May 18, 2001. "Reference News" Currently, the number of ground source heat pumps in the United States accounts for 19% of all air conditioning ownership, exceeding 40% in some states, and sales are increasing at a rate of 20% per year. In 2003, the sales volume in the United States reached 400000 units. In 2005, the number of engineering cases exceeded 400000, saving approximately $400 million in energy costs and reducing the impact of 1 million tons of carbon on the greenhouse effect. The US Environmental Protection Agency has confirmed that ground source heat pumps are currently the most efficient, environmentally friendly, and renewable energy source for air conditioning and heating systems.

England, Canada, Ireland, Scotland, Australia, and the United States all have laws and government funds to encourage the application of ground source heat pumps, including providing low-cost electricity, low interest government loans, cash discounts, financial subsidies, and other individual or bundled support;
The government investment in healthcare, education, military and other projects in countries such as South Korea invariably specifies the application ratio of ground source systems;
The ground source heat pump heating and supply of domestic hot water in Switzerland and Norway have exceeded 96%;
In Sweden, unless a ground source application system is used, other heating and hot water supply systems must obtain special government approval.

Domestic application situation
In 1997, the Ministry of Science and Technology of China and the US Department of Energy signed a "Cooperation Agreement on the Utilization of Ground Source Energy", which accelerated the application and promotion of ground source heat pump air conditioning in China.
Since 2000, various regions such as Beijing, Shenyang, Chengdu, and Chongqing have implemented encouragement and subsidy policies for ground source heat pumps.
In 2002, the National Economic and Trade Commission and the US Department of Energy signed the "Agreement between the Governments of China and the United States on Promoting the Commercialization of Renewable Energy Development and Utilization in China", committed to promoting the US soil air ground source heat pump technology in China and achieving its commercialization and industrialization.
On September 4, 2006, the Ministry of Finance and the Ministry of Construction jointly issued the "Interim Measures for the Management of Special Funds for Renewable Energy Building Applications" (Caijian [2006] No. 460), Article 4- Key areas supported by special funds:
(1) Integrated solar energy supply with buildings for domestic hot water, heating and cooling, photovoltaic conversion, and lighting;
(2) Utilize soil source heat pump and shallow groundwater source heat pump technology for heating and cooling;
(3) Utilizing freshwater source heat pump technology for heating and cooling in areas with abundant surface water;
(4) Coastal areas utilize seawater source heat pump technology for heating and cooling;
(5) Using sewage source heat pump technology for heating and cooling;
(6) Other approved areas of support.
As of the end of 2008, the installed area of ground source heat pump systems in China was 75 million square meters, with a growth rate of over 20%

Shenyang: The largest city in China that utilizes ground source heat pump technology for heating and cooling
Since 2006, Shenyang has been vigorously promoting ground source heat pump technology. On March 28, 2008, Vice Governor Li Jia emphasized at the construction and housing security work conference in Liaoning Province that the province should strengthen the promotion of new technologies such as ground source heat pumps, and complete the application area of ground source heat pumps by 27 million square meters in 2008. At present, Shenyang has adopted ground source heat pump technology to provide heating for an area of 36 million square meters.

Chongqing: Subsidies for Renewable Energy Building Demonstration Projects
Recently, the "Interim Measures for the Management of Special Subsidy Funds for Renewable Energy Building Application Demonstration Projects in Chongqing" were issued. For those who use renewable energy heat pump units, a subsidy of RMB 800 per kilowatt of customized cooling capacity will be provided according to the unit quota. For high-temperature heat pump units that use renewable energy to provide domestic hot water, a subsidy of RMB 900 per kilowatt of customized heat capacity will be provided according to the unit quota.

Shanxi: Construction industry receives subsidies for using ground source heat pump technology
Starting from 2008, relevant departments in Shanxi Province will provide subsidies for construction projects that use heat pump systems. The energy-saving renovation of provincial government office buildings and large public buildings will prioritize the use of ground source heat pump technology. For public welfare projects such as schools, hospitals and administrative office buildings invested by the government, heat pump systems are preferred for heating and cooling systems, and the funds needed are from fixed assets investment of governments at all levels. If heat pump system is selected for other projects, one-time subsidies will be given from fixed assets investment of governments at all levels.

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