About water heating and geothermal energy

Problem description:

My newly bought house is ordinary hanging water heating, and I want to change it into water heating and geothermal heating. Please help me analyze the advantages and disadvantages of ordinary hanging heating and plumbing geothermal. Thank you!

Analysis:

Questions and answers about floor heating:

First, what is floor heating?

A: The full name of floor heating is low-temperature radiant floor heating. It was first widely used and popularized in developed countries in North America and Northern Europe. This is a very mature and widely used heating technology. However, Japan and South Korea in Asia are unique in the way of residential heating because of their traditional living habits. This technology was introduced into China less than ten years ago. It first entered Yanbian, Jilin Province from South Korea, and quickly spread to the three northeastern provinces.

The principle of floor heating is to heat the floor to 18℃ -28℃ through the heating pipe buried under the floor, and radiate the heat evenly indoors to achieve the heating effect. According to different heat sources, it can be divided into water heating and electric heating. At present, China mostly adopts low-temperature hot water heating system.

There are four kinds of heat sources: 1) domestic wall-hung boiler 2) municipal heating pipe network 3) residential boiler room 4) regional geothermal system.

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2. Q: "Is the maintenance of floor heating water leakage more troublesome than that of heating water leakage? I am worried that the technology will not pass, and if it is broken, it will be exposed to the ground? "

A: "We fully understand your concern. Because the phenomenon of heating leakage is more common. Especially after a few years of use, it rusts. And the floor heating is safe and reliable. The basis and reasons are as follows:

(1) Floor heating has a history of forty or fifty years in developed countries in the northern hemisphere, and the technology has already matured. It is recognized as the safest, most reliable, most scientific and most environmentally friendly heating method. So many returnees who came back from studying abroad chose it.

(2) The user is worried that the pipeline damage on the floor will lead to water leakage. In fact, this kind of worry is unnecessary. Just like the concealed works of water pipes, wire tubes, telephone lines and cable TV pipes in home decoration. Why are these pipes broken and people are not worried about maintenance? Our special pipeline has passed the test of the National Testing Center. Its service life can be the same as that of a house or building. 50 to 70 years.

The connection between the water outlet pipe and the water inlet pipe is located in the water separator, but the water separator is not under the floor and is installed on the ground wall for easy adjustment. Even if the joint leaks, the maintenance is very convenient.

(3) Domestic floor heating technology and specifications have already matured.

Technical specification for application of low-temperature hot water floor radiant heating in Beijing was implemented on June 65438+ 10/day, 2000. Explain that * * * recognizes floor heating, and makes corresponding technical specifications.

Document 2 18 issued by the Ministry of Construction on March 8, 2004 also affirmed the application of low-temperature ground radiation technology in buildings. This heating method not only improves indoor comfort and saves space, but also saves more than 30% energy consumption.

According to Wang, Secretary General of the Plastic Pipe Professional Committee of China Plastics Office, in 2004, the sales volume of pipes used for floor heating in China was 30,000 tons. The PE-RT tubes that entered the China market later were also produced by more than 20 manufacturers. In the same year, it produced 5000 tons.

(4) In order to completely eliminate the worries of customers, our company has adopted three commitments:

1) The warranty period of peers is 1-2 years, and that of our company is 5 years.

2) Before the arrival of each heating period, free on-site debugging will be conducted according to customer requirements.

3) If there is any quality problem or fraud, you can directly complain to the Industrial and Commercial Bureau. We have provided the complaint telephone number of the industrial and commercial bureau on the company website and advertisements.

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Third, ask, "Do we have a district with floor heating in Beijing?" top & gt& gt

A: "Floor heating was introduced into China for about eight years. It was first introduced into Yanji City, Jilin Province from Korea. Spread quickly. At present, most of the newly-built residential areas in the three northeastern provinces have abandoned the radiator with a history of 100 years. Floor heating has become the mainstream of northeast heating.

Beijing residence was adopted late. But many developers are aware of the force majeure of this trend of the times. Seize business opportunities and become the best selling point of real estate. Develop a land with warm floor. At present, according to our preliminary understanding, the whole community uses floor heating: the Molybdenum Garden in Beiyuan, the Yiyuan Garden on the left bank of the Second Ring Road, the Sheng Yuan Villa in Daxing, and the Farmers' New Village in Fengtai Wang Zuo Township.

In addition to the above-mentioned whole community adopts floor heating. Many developers will not take a one-size-fits-all approach to heating. Leave it to the owner to choose. More residential areas have adopted single-family floor heating. Such as Sanhuan New City, No.5 Park, Sweet Water Garden, Lugang, Blue Olin, Guanghuaju, East Acropolis, Yiran Home and Zhongxin Home, who are interested in communicating with the residents who use floor heating in the above communities.

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Q: "What are the advantages of floor heating compared with other heating systems (radiators)?" top & gt& gt

(a) in line with the outline of Chinese medicine human health

Traditional Chinese medicine believes that "heat starts from the head and cold enters from the feet", so "warm people warm their feet first", while heating is just the opposite, with hot head and cold feet. Generally, when indoor radiators are used for heating in winter, the temperature of people's feet is only 15 degrees Celsius or even lower. People who watch TV or sit for a long time can easily increase the prevalence of arthritis. Especially the elderly and children with poor resistance. The bottom-up radiation mode of heat source used in floor heating is conducted to the legs and feet, and the head is cold and the feet are hot, which meets the physiological requirements of human body and is very beneficial to human health.

(2) The space in the room (hall) is 2-3% more than the heating, which breaks through the limitation of heating.

In the home decoration design of heating, the radiator (film) and pipeline are annoying. In order to avoid the limitation of objects and cooling space, it often brings insurmountable problems and obstacles to furniture placement and overall style setting. Floor heating, no radiators and pipes, empty walls, a blank, follow one's inclinations.

(3) Get rid of the trouble of water leakage permanently, and ensure the safety of high-grade furniture and valuables.

If we guess correctly, you must have the experience of heating leakage in winter. This is due to product quality or internal corrosion of the system. After a period of time, it will be repaired or replaced, which will also bring trouble to everyone and even cause property losses. In April 2005, in Tracy Hotel, the National Radiator Association held an industry meeting to study the leakage of radiators (heating) due to corrosion. And repeatedly emphasized the internal corrosion protection of radiator. It can be seen that the problem is serious. And floor heating does not have to worry about this problem. The pipes used are all qualified products tested by the National Building Materials Testing Center. It can be used for 50-70 years without replacement. Live with the house.

(4) It is more convenient to control the temperature of each room (hall) through a separate valve.

Take heating as an example. The temperature is beyond our control. It is cold or not hot, but warm and hot. No matter whether you are gloomy or anxious, you can only add clothes or open the window yourself. Floor heating can adjust and control the temperature of each room according to individual needs through the partition door installed on the water separator, and truly achieve humanized heating.

(5) Only 60% economic investment is needed to achieve 100% comfort.

Generally, the water inlet temperature of radiators should be above 90 degrees Celsius, while floor heating is low-temperature hot water below 60 degrees Celsius. Therefore, energy is saved and consumption is reduced, especially for wall-hung boilers. Many users think it is not cost-effective to change the installed heating into floor heating. Practice has proved that the energy consumption of floor heating is only two-thirds of that of heating, that is, only 60% of the heating cost is paid every month on average. You can enjoy the comfort of modern heating. In this way, you can earn back the one-time investment cost in five years.

(6) You can say "no" to respiratory infectious diseases caused by indoor heating in winter.

Winter is the season with frequent respiratory infectious diseases. While the traditional radiator heats the air to generate convection, it also brings the spread of dust and harmful bacteria in indoor corners. Directly threaten the respiratory health of the weak (especially the elderly and children). Floor heating takes the form of radiation, so the dust flow in the air is much smaller.

(7) Give you a quiet home.

Due to the insulation and sound insulation board at the bottom of the floor heating, the sound insulation effect of the floor is very obvious.

(8) The heat dissipation area is larger than any other heating method, and the heating is uniform.

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Verb (abbreviation of verb) asks: "Which is more cost-effective than floor heating or heating?" top & gt& gt

A: No matter which heating method is used. Many owners are concerned about the future use and installation costs.

The installation fee of floor heating varies according to the price of materials selected by the owner. For example, imported water separators and domestic water separators, imported pipes and domestic pipes. In addition, according to the different room orientation and thermal insulation performance, the pipe spacing is also different. That is, there are differences in material consumption.

The installation and operation costs of floor heating and radiator (heating) are as follows:

The installation cost of floor heating is about 60 yuan /m2 (material+installation cost). The installation of radiators (heating) popular in the market needs about 70 yuan /m2 (including the purchase of radiators in 55 yuan /m2, plus the installation fee 15 yuan /m2 or more). If air conditioning is used for heating, the cost is as high as 100 yuan /m2.

Comparison of usage fees:

In recent years, all new residential quarters in Beijing have adopted household independent heating. Because floor heating is more energy-saving than radiator, it can also save the cost of13. Air conditioners consume more electricity, so the price is higher.

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6. Q: "Can you introduce the detailed structure of floor heating?" top & gt& gt

A: ok, let me introduce it from bottom to top.

1) floor leveling layer. Remove the protrusions to form a horizontal plane.

2) The insulation layer is made of polystyrene foam board to prevent heat from being transferred downwards.

3) The reflective film radiates heat rays upwards.

4) The U-shaped clamp is used to fix the heating pipe.

5) Use steel wire mesh to prevent concrete filling layer from cracking.

6) The following types of heating pipes are usually selected:

Crosslinked polyethylene pipe (PEX)

Aluminum-plastic composite pipe

7) The concrete in the filling layer is used for burying the ground and protecting the heating pipeline.

8) The floor decoration layer usually adopts marble, floor tile or solid wood floor.

9) Set a water separator to centrally control the water supply and backwater of each household. "

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Q: "At present, there are several specifications of floor heating pipes in Dong Bang. What is the difference between them? "

A: "We use PEX and aluminum-plastic composite pipes. The latter is more expensive. The latter transfers heat faster than the former. top & gt& gt

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8. Q: "Can the anti-crack net be used? Why? " top & gt& gt

Answer: "Whether users use anti-crack net depends on the material of the floor decoration layer. Because the function of anti-crack net is to prevent the cement in the filling layer from cracking. If the floor is used, the cracks will not have any effect on the decorative layer and can be omitted. If the decorative layer is floor tile or marble, anti-crack net must be used to prevent cracking. "

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Q: "If the anti-crack net is not used, will the cracks in the filling layer cause damage to the hot water pipe? What about expansion joints? " top & gt& gt

Answer: "Hot water pipes are flexible materials, which have certain ductility and cracks will not be damaged. The damage of hot water pipe is caused by the impact or cutting of external sharp objects.

The expansion joint is to prevent the filling layer from expanding with heat and contracting with cold, leaving a certain gap at the distance of six meters and the corner.

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X q: "I went back to my brother's house in the northeast, and the geothermal heat in his house (called geothermal heat in the northeast) was unbearable. Why? Is there any good way to control it? " top & gt& gt

A: There are three reasons for this. First, most heat sources in Northeast China come from heating companies or residential boiler rooms with central heating. Its inlet water temperature is mostly around 90 degrees Celsius, and it was designed for radiators in the past. Floor heating is a low-temperature hot water system. The inlet water temperature is about 60 degrees Celsius. Second, the floor heating installation company or construction personnel did not teach users how to adjust water supply. Adjustment is divided into automatic adjustment and manual adjustment. The manual control valve is located at the water collector. So as to adjust that room temperature of each room (hall). The third is the construction unit. In particular, the "guerrillas" who are stragglers are unprofessional and have shortcomings in design and construction. The design of pipe spacing and pipeline direction is unreasonable. Xi。 Q: "So, how to design is reasonable?"

A: "Professional designers should consider the comprehensive factors such as heat source, water content of the house, room orientation, apartment type, room area, and hot water pipes selected. According to:> and> as designed specification documents.

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Xi。 Q: "How to design the floor heating is reasonable?" top & gt& gt

A: "Professional designers should consider the comprehensive factors such as heat source, water content of the house, room orientation, apartment type, room area, and hot water pipes selected. According to:> and> as designed specification documents.

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12. Q: "What is the appropriate floor temperature?" top & gt& gt

Answer: "18-26 degrees Celsius should be adopted. The upper limit of the temperature is 28 degrees Celsius. Such as living room, study, bedroom, etc. Other rooms are adjusted according to personal preference (comfort).

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Thirteen. Q: "How long will the construction period take?" top & gt& gt

A: "It depends on the theme of floor heating. Such as villas, ordinary houses, sauna bath centers, hospitals, shopping malls, swimming pools, etc. It only takes three working days to formally build an ordinary house with an area of 100 square meter.