First, the working principle
First, shallow geothermal energy
Under the radiation of the sun, the earth becomes a giant "reservoir" of solar energy, and a large number of clean renewable energy is stored in shallow water and rock and soil in the earth's crust. This kind of energy is called shallow geothermal energy, or ground source for short.
Second, the heat pump technology
It is an energy-saving technology invented by modern science. A certain amount of electric energy is input into the heat pump unit to drive the compressor to do work, so that the working fluids in the unit (such as R22, R 134a) repeatedly undergo the physical phase change process of evaporation and condensation, and heat exchange and transfer in space are realized.
Third, the ground source heat pump central air conditioning system
It is a heating and air conditioning system which takes rock, ground water or surface water as low-temperature heat sources and consists of a water source heat pump unit, a geothermal energy exchange system and an in-building system. Its working principle is: in winter, the heat pump unit absorbs heat from the ground source (shallow water or rock and soil) to heat the building; In summer, the heat pump unit absorbs heat from the room and transfers it to the ground source to realize the air conditioning and refrigeration of the building. According to the different forms of geothermal exchange system, ground source heat pump system can be divided into groundwater ground source heat pump system, surface water ground source heat pump system and ground source heat pump system.
B. Application conditions
First, the application conditions of underground water source heat pump system:
1. There are abundant groundwater resources near the construction project, which is convenient for implementing the water supply and return project.
2. Local policies allow the use of groundwater.
3. The groundwater temperature is moderate, the water quality is suitable, the water supply is stable and the recharge is smooth.
Second, the surface water ground source heat pump system application conditions:
1. It is rich in surface water (such as river water, river water, lake water, seawater, reservoir water, sewage, reclaimed water, geothermal tail water, industrial wastewater, etc.). ) near the construction project.
2. The water quantity is sufficient, the water temperature is moderate, and the water quality can meet the use requirements after simple treatment.
Three, the ground source heat pump system (ground pipe) application conditions:
1. Due to the lack of water resources near buildings or various factors, water resources cannot be utilized.
2. There is enough space to lay "buried pipes" near the building (for example, in front of and behind the office building, villa garden, school playground, etc.). ).
C, design concept
"On the premise of meeting people's basic needs of cold and heat, we can realize environmental protection and energy saving to the maximum extent, and at the same time create excellent indoor air quality", which is Tsinghua Tongfang's interpretation of air-conditioning products.
"Environmental protection, energy saving, water saving and meeting users' needs" is the theme of R&D design.
First, environmental protection.
Water source heat pump uses solar energy resources stored in surface soil and water as cold and heat sources, which has no combustion, smoke exhaust, waste and pollution. Using renewable resources is a clean and environmentally friendly technology.
Second, save energy.
Advanced design, high energy efficiency, above 4.0 when heating, above 5.0 when cooling, and up to 7. 1.
Third, save water.
The heat exchanger adopts the design idea of "large temperature difference and small flow", and the water consumption of the unit is less than that of the traditional design.
Fourth, save money.
Through a system to meet the demand of cooling and heating, the one-time investment is only1/2-2/3 of the traditional cooling and heating investment; The operating cost is only 1/2-2/3 of the traditional way.
Verb (abbreviation for verb) reliability
Modular design, completely independent subsystem, few parts, excellent quality and multiple safety protection functions. Fully considering the coordinated and unified control of multiple systems, computer remote operation can be realized, making the unit more humanized and intelligent.
D. Technological innovation
In the product design of Tsinghua Tongfang ground source heat pump, based on China's national conditions and user's needs, mature and scientific heat pump technology is adopted to optimize resource allocation. Give consideration to both cooling and heating conditions, and focus on ensuring the use effect of users. During the operation of the unit, the switching between hot and cold conditions is realized through the water system pipeline and switching, and the fluorine system remains stable.
Tsinghua Tongfang water source heat pump unit not only has the characteristics of traditional water source heat pump, but also carries out innovative design according to the national conditions of China:
First, the temperature of hot water is high.
Under standard working conditions, the outlet water temperature of universal water source heat pump unit can reach above 48℃, and the outlet water temperature of environment-friendly high-temperature water source heat pump unit can reach above 60℃. Gao Quan temperature can reduce the selection capacity of indoor equipment and ensure the warmth and comfort of the room.
Second, the temperature difference between inlet and outlet water is large, saving water resources.
Under the working condition of the unit, the temperature difference between inlet and outlet water at the water source side is 8℃ in winter and 1 1℃ in summer. Different from the traditional 5℃ temperature difference design, the water consumption of the unit can be saved by 40% and the operating cost can be reduced.
Third, the world's advanced level of all-liquid technology
High-efficiency flooded water source heat pump unit adopts flooded evaporator, which has high heat exchange efficiency. The unique design of oil return system and precise control system of refrigerant flow greatly improve the energy efficiency of the unit, and the energy saving effect is 30% higher than the national standard.
Fourthly, the system optimization is simple and the components are excellent and reliable.
Through the optimization design of the system and the combination of independent modules, the unit system runs simply and reliably. The control components and electrical components of the refrigeration system adopt world-class components to ensure the long-term efficient and reliable operation of the unit in a wide range of working conditions. Less moving parts, low failure rate and low maintenance cost.
Five, the unit model is complete, and the scope of application is wide.
The unit has complete models, and the single unit capacity ranges from 150 kW to 3800 kW, which can widely use various water resources, such as groundwater, river water, river water, lake water, seawater, reservoir water, sewage, reclaimed water, geothermal tail water and industrial wastewater.
Six, intelligent digital control
Large-screen LCD, industrial-grade intelligent controller and advanced computer control system are adopted, with full digital Chinese display function, and the workflow adopts visual control panel, so that operators can see the operation of the unit at a glance. It can also be connected with external equipment, remote users and control room through standard interfaces, so as to realize various maintenance and control functions such as automatic on/off, alarm, prompt, recording, retrieval and fault diagnosis.
Seven, multiple automatic protection function
The unit has compressor exhaust overtemperature, motor overtemperature and cold water antifreezing temperature protection; Over-current, open-phase, reverse-phase and overload electrical protection; The refrigeration system has multiple protection functions, such as high and low pressure, oil level, oil pressure difference, abnormal state protection of water cut, etc.
Eight. Remarkable energy saving efficiency
Both evaporator and condenser use heat exchange tubes with enhanced heat transfer inside and outside, which has higher heat exchange efficiency. Advanced process design minimizes energy loss.
Nine, simple operation, smooth operation
The unit adopts intelligent automatic control, and the operation is very simple; In addition, efficient protection and noise elimination measures are adopted, and the operation is stable.
E, product series
I. Universal Water Source Heat Pump Unit
Tsinghua Tongfang universal water source heat pump unit has advanced technology, mature products and stable performance, and is widely used in various ground source conditions.
◎ Adopt high-efficiency refrigeration compressor, with step or stepless energy adjustment, flexible and convenient control, stable and reliable operation.
◎ The control components and electrical components of the refrigeration system adopt the world's top brand components to ensure the stable and efficient operation of the unit under a wide range of working conditions.
◎ The heat exchanger has the working characteristics of "large temperature difference and small flow rate", which saves precious water resources for users to the greatest extent and reduces the operating cost of the unit.
Second, efficient all-liquid water source heat pump unit
Tsinghua Tongfang high-efficiency flooded water source heat pump unit has the world-leading flooded technology and unique oil return technology, and its energy saving effect is 30% higher than the national standard.
◎ All-liquid water source heat pump unit adopts all-liquid steam engine with high heat exchange efficiency.
◎ Unique oil return system and precise control system of refrigerant flow are adopted.
◎ The computer chip automatically controls and intelligently adjusts the optimal operation state of the unit, with low operation cost and high economy.
Third, environmental protection high temperature water source heat pump unit
In 200 1 year, "heating system reform" became a key issue of national concern. In response to the market demand, Tsinghua Tongfang successfully launched a high-temperature water source heat pump unit in the industry, which provided a substitute for the old coal-fired boilers that polluted the air and became a high-tech product of social concern.
After five years of research and development, a new generation of environmental protection high temperature water source heat pump unit was launched in 2006.
◎ The outlet water temperature is 60-70℃, which realizes one machine with three effects-warm in winter and cool in summer, and provides domestic hot water.
◎ Using R 134a green refrigerant, effectively protecting the environment.
Fourth, the ground source heat pump unit
Tsinghua Tongfang GHP ground source heat pump unit is specially designed and developed for ground temperature conditions, which can better adapt to low temperature conditions, especially for ground source heat pump projects.
◎ The unit adopts modular design and imported refrigeration compressor, with high efficiency, low noise and reliable performance.
Five, anti-corrosion water source heat pump unit
In 2005, Tsinghua Tongfang developed a corrosion-resistant water source heat pump unit for inferior water sources, using corrosion-resistant high-efficiency heat exchangers, which are suitable for inferior water sources such as seawater, sewage, geothermal tail water, tunnel water and industrial wastewater.
F, system application scheme
A, the use of groundwater ground source heat pump system project
1. The residential area of Beijing Hummingbird Community has a building area of 80,000 square meters.
2. Beijing Minyue Jiayuan Community, with a construction area of 92,000 square meters.
3. The building area of Xiang Ying Hotel, office building and family building is 25,000 square meters.
Second, the use of surface water ground source heat pump system engineering
1, seawater utilization project
Dalian Xinghai Holiday Hotel is a four-star private hotel with property rights, with a building area of 40,000 square meters.
2, the use of river water projects
Zhejiang Jiande Moon Bay Hotel is a four-star luxury hotel with a building area of 40,000 square meters.
Three, the use of surface water and groundwater combined ground source heat pump system engineering
Beijing Juyongguan Ancient Inn has a five-star standard building area of 20,000 square meters.
Four, the use of underground tunnel water source ground source heat pump system engineering
Jinzhou City, Liaoning Province, civil air defense office building, building area of 6000 square meters.
Five, the use of urban sewage ground source heat pump system engineering
Urban sewage is a kind of heat energy resource that can be used in cold areas in northern China. Its temperature is relatively stable all year round, higher than the ambient temperature in winter and lower than the ambient temperature in summer. It is a good cold and heat source of heat pump. This temperature characteristic makes the sewage source heat pump more efficient than the traditional air conditioning system, and has remarkable effects in energy saving and operating costs. Sewage source heat pump system can be used for heating, cooling and providing hot water for bathroom.
1. Building area of public security bureau and court office building in Yanqing County, Beijing13000m2.
2. The office building area of Shijiazhuang Sewage Treatment Plant is 1 1000 square meters.
Six, the use of ground source heat pump system project
1. The comprehensive building of Tsinghua Tongfang Wuxi Science Park has a construction area of 4,400 square meters.
2. The residential area of Beijing Longyi Jing Shun Villa covers an area of 40,000 square meters.
Air source heat pump technology
Www.dr 1992.com Shanxi Office13994219771.
1. The air source heat pump technology is an energy-saving and environment-friendly heating technology based on the principle of inverse Carnot cycle.
Air-source heat pump system obtains low-temperature heat source through natural energy (air heat storage), and becomes high-temperature heat source after efficient heat collection and integration of the system, which is used for taking (supplying) warm water or supplying hot water. The whole system has high heat collection efficiency.
2. Heat pump has four advantages, the first is energy saving, which is conducive to the comprehensive utilization of energy, the second is conducive to environmental protection, the third is the combination of cold and heat, the equipment utilization rate is high, which saves investment, and the fourth is that it is more convenient to regulate because it is driven by electricity, so heat pump has attracted everyone's attention.
3. Heat pump technology is an energy technology in 2 1 century, which can improve the utilization rate of energy in the form of heat pump. The utilization of energy efficiency has two meanings. From the environmental point of view, it can reduce greenhouse gas emissions and reduce harmful factors to the environment. On the other hand, it is the technology to solve the high-altitude load of electric power.
4. The heat pump absorbs a lot of low-temperature heat energy in the air with very little electric energy, which is converted into high-temperature heat energy through the compression of the compressor and sent to the water tank to heat hot water, so it has the advantages of low energy consumption, high efficiency, high speed, good safety and strong environmental protection, and can continuously supply hot water. As a hot water system, it has unparalleled advantages.
5. The heat pump water heater unit follows the law of conservation of energy and the second law of thermodynamics. By using the heat pump principle, only a small part of mechanical work (electric energy) is needed to transfer the heat in the low-temperature environment (atmosphere or groundwater, etc.). ) add it to a water heater in a high temperature environment to make high temperature hot water. A heat pump can be compared with a water pump. Water cannot spontaneously flow from a low place to a high place. To transport water from a low place to a high place, a part of electricity must be consumed by a water pump before it can be sent to a high water tank. Similarly, according to the second law of thermodynamics, heat cannot be spontaneously transferred (transferred) from a low temperature environment to a high temperature environment. In order to achieve this goal, some mechanical work (such as electric energy) must be consumed by machines in order to transfer heat from low temperature environment to high temperature environment. This kind of machine is called "heat pump". The function of heat pump is to take out the heat from air or low-temperature water, and send it to high-temperature environment for application together with the heat energy converted from electric energy used by itself.