Installation and construction of ground source heat pumps for hospitals

Installation and construction of ground source heat pumps for hospitalsWe can refer to the following methods for the installation of ground source heat pump heat exchangers:

Ground source heat pump household equipment, as an efficient, energy-saving and environmentally friendly air conditioning device, is now receiving increasing attention from people. Many people are also inclined to use imported ground source heat pump equipment. Next, the editor of Xuri New Energy will talk about the principles that need to be followed when installing ground source heat pump household equipment.

The specification for outdoor well drilling area requires a depth of 60 to 100 meters for ground source heat pumps, but due to the need for trench excavation, the actual depth of well drilling will be 86 to 86.6 meters. If there are rock layers or other hard objects underground, it is necessary to consider separately and communicate with the owner. In addition, ground source heat pumps exchange heat with soil through outdoor well drilling. According to the national standard GB50366-2005, the spacing between buried wells in Shanghai is generally 4.5m. A building area of 300 square meters requires at least 80 square meters of well drilling area, and a building area of 400 square meters requires at least 110 square meters of well drilling area. Empirical calculations show that the ratio of well drilling area to building area is about 1:1; Taking a row house as an example: if the well area is too small, it will cause the air conditioning usage effect to decrease year by year, and the system will not be able to operate normally after 5 or 6 years. Heat exchangers are installed in series or parallel. There are two types of fluid flow circuits in ground source heat pump heat exchangers: series and parallel. The series has a larger diameter, higher pipeline costs, and the length and pressure drop characteristics limit the system capacity. The diameter of the pipeline is relatively small, the pipeline cost is low, and it is often arranged in the same program. When the flow balance between each parallel loop is reached, the heat transfer is the same, and the pressure drop characteristics are conducive to improving the system capacity. Therefore, practical engineering generally adopts parallel and same program.

Pipe selection. Generally speaking, once the heat exchanger is buried underground, it is almost impossible to repair or replace it, which requires ensuring the chemical stability and corrosion resistance of the buried pipes. The metal pipes used in conventional air conditioning systems have serious shortcomings in this regard, and there are a large number of pipes that need to be buried underground. Therefore, lower priced pipes should be prioritized for use. Therefore, plastic pipes are generally used in soil source heat pump systems.

Installation and construction of ground source heat pumps for hospitalsDetermine the pipe diameter. In practical engineering, determining the pipe diameter must meet two requirements:

(1) The pipeline should be large enough to maintain the minimum conveying power;

(2) The pipeline should be small enough to maintain turbulence inside the pipeline to ensure heat transfer between the fluid and the inner wall of the pipeline. Obviously, the above two requirements are contradictory and require comprehensive consideration. Generally, small diameters are used for parallel loops, while large diameters are used for header pipes.

The installation process of ground source heat pump heat exchangers must be followed, otherwise, on the one hand, it will affect the later use and easily cause malfunctions, and on the other hand, it will also have many impacts on construction. 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 it can also meet the heating needs simultaneously with one set of equipment. Provide cooling. The requirement for domestic water supply reduces the initial investment in equipment, and ground source heat pumps can be applied to hotels. Residential community. Apartment. workshop. market. Office building? Small ground source heat pumps are more suitable for heating villas and residential buildings such as schools.

Low maintenance costs and unmanned operation

Ground source heat pump systems have fewer moving parts than conventional systems, thus reducing maintenance. The system is either buried underground or installed indoors, not exposed to wind and rain. The unit is compact, space saving, and can be protected from damage, making it more reliable and extending its lifespan. High degree of automatic control, capable of unmanned operation. Remote management, no need to hire personnel for supervision. The remote monitoring system for ground source heat pumps reduces the pollutant emissions of small ground source heat pumps by more than 38% compared to air source heat pumps and more than 70% compared to electric heating. It truly achieves energy conservation and emission reduction, reducing energy waste and exhaust emissions.

Easy maintenance

Ground source heat pump systems have fewer moving parts than conventional systems, thus reducing maintenance. The system is installed indoors, not exposed to wind and rain, and can also be protected from damage, making it more reliable and extending its lifespan.

long lifespan

The underground buried pipes of ground source heat pumps are made of polyethylene and polypropylene plastic pipes, with a lifespan of up to 50 years, which is 35 years longer than that of ordinary air conditioners.

Advantage 2: Green and Environmental Protection

The pollutant emissions of ground source heat pump air conditioning systems are reduced by more than 38% compared to air source heat pumps and more than 70% compared to electric heating, truly achieving energy conservation and emission reduction, and maintaining environmental balance.

Advantage 3: Long service life

The service life of ground source heat pump system units is about 25 years, and that of buried pipe systems is about 50 years, which is longer than the service life of ordinary air conditioning systems and heating equipment.

Advantage 4: No frost attenuation

Any system with a fan, such as a Freon air conditioner, will be affected by the outdoor temperature. Generally, in an indoor environment of minus 5 degrees Celsius, the main unit only provides 80% of the heating capacity, and no matter how low the temperature is, it cannot provide heating. However, ground source heat pump systems do not have such problems.

Advantage 5: Energy saving and cost saving

During summer cooling, the ground source heat pump air conditioning system utilizes heat recovery function to provide domestic hot water without energy consumption. Summer cooling and winter heating both utilize surface water and soil to maintain a constant temperature, achieving cooling and heating with an energy-saving efficiency of over 40%.

Advantage 6: 24-hour domestic hot water function

Ground source heat pump air conditioning adopts total heat recovery technology to provide users with domestic hot water supply, with a hot water temperature of around 55-60 degrees.

Advantage 7: Comfortable and pleasant temperature

The temperature of the ground source heat pump air conditioning system is softer than that of ordinary air conditioning, which conforms to the concept of human health and will not cause harm to human health.