Survey: Bacheng gas boiler without intelligent thermostat

The popularity of natural gas heating has made more and more households use gas boilers, but this self-heating method seems to be more expensive than central heating. The author found from some group buying websites that residents of many communities in the winter were buying smart thermostats. This kind of widget that senses the working status of the boiler flexibly at room temperature can usually save the residents 20% to 30% of the cost. Experts estimate that the total heating area of ​​gas-fired boilers in the city is about 50 million square meters, and over 80% of them are not equipped with intelligent thermostats. The annual waste of natural gas in the heating season is up to 100 million cubic meters.

Ms. Zhao, who lives in Baiwang Jasmine Park, accidentally touched the thermostat when she participated in the decoration group purchase several years ago, and tried to install a wall-hung boiler in her own home. In the end, I didn’t care much about how much money was saved. A few days ago she accidentally chatted with her neighbors and was shocked when it came to heating costs. “The neighbor’s said that last winter the fireplace had taken more than 2,000 words (cubic meters). After counting more than 4,000 yuan, I learned that my home was cheap. The winter heating cost was only 1,200 words and more than 2,000 yuan. Very warm. Maybe we are not at home during the day, but it will not be such a big difference." Ms. Zhao introduced. Now they slowly install more thermostats in communities, and community forums have initiated group purchases, with more than 400 yuan for cable and 600 yuan for wireless sensors.

A large wall-hung boiler dealer engineer in the capital told reporters that many of the newly built residential areas in Beijing's Fourth Ring Road have been heated by natural gas boilers. “Developers and property companies are of course willing to use wall-hung boilers to save on the same heating costs every year. Some households with centralized heating do not pay for heating for many years. What can you do?” he also revealed that developers had pre-installed Wall-hung boilers, almost invariably not equipped with intelligent thermostats, just reserved interfaces. In developed countries in Europe and America, intelligent thermostats are standard accessories for wall-hung boilers. "That is, the concept of thermostats was only known to some Beijing consumers in the past two years. Now, about 80% of the households who have natural gas self-heating have not installed it," he said.

The writer asked a number of citizens who used wall-hung boilers for heating yesterday. They do not know what the smart thermostats are. They also thought they were water temperature control devices that were built into the boilers. At present, the gas boilers on the market will control the working status according to the water temperature. When the water temperature exceeds 60 degrees Celsius, it will automatically pause to avoid overheating of the room temperature. Generally, the cumulative time for full-load operation of the wall-mounted boiler is 5 to 6 hours.

However, the water temperature control can't accurately control the indoor temperature. Natural gas self-heating users often feel that the room temperature is not too hot or too cool. If no one at home turns off the boiler completely, it is energy saving, but when it comes home, it should be warm. Nearly 1 hour. If a thermostat is installed, the boiler system will automatically switch on and off every day. The room temperature at any time of morning, afternoon, evening and night can be set according to the needs, so as to achieve the effect of energy saving, even more than the central heating of natural gas. cheaper.

[Small bills]

Taking a building with a floor area of ​​100 square meters as an example, the rated air consumption of the 24 kW gas boiler is 2.8 cubic meters per hour, and the cumulative operating hours are 5 hours per day. The daily gas consumption is 14 cubic meters. According to the city's natural gas self-heating subsidy policy, the subsidy per cubic meter is 0.15 yuan and the actual price is 1.9 yuan, so the total cost for a heating season is 14 x 1.9 yuan x 120 days = 3192 yuan.

With the installation of intelligent thermostats, the actual air consumption per day for a 100 square meter house is about 11 cubic meters, and the total cost for a heating season is 11 x 1.9 yuan x 120 days = 2508 yuan.

The 50 million square meters wall-hung boilers in this city are self-contained, with 500,000 households, an average of 100 square meters, and 80% unmounted thermostats, which means that 400,000 households use 3 cubic meters of natural gas per day. One heating season The waste of natural gas is 400,000 × 3 × 120 days = 144 million cubic meters.

Experts remind that gas boilers should not be widely promoted compared to natural gas central heating. The cost of gas boilers is similar to that of gas boilers. It can also effectively avoid arrears disputes. Should it be the main method of Beijing residents' heating in the future? In response, Zhang Xiaosong, deputy chief engineer of Beijing Gas Thermal Design Institute, reminded that gas-fired boilers are not suitable for large-scale promotion in Beijing, because the emitted nitrogen oxides are prone to aggregation and cause local air pollution, especially in densely populated high-rise residential buildings. use.

"As a clean energy source, the emission of harmful substances from natural gas combustion is significantly lower than that of coal-fired boilers. However, if households use fireplaces, they will form smoke curtain walls with water vapor and nitrogen oxides around the residential buildings. There is often no wind in Beijing. The weather conditions are likely to cause local pollution, so it is more appropriate to implement it in low-density residential areas, and high-rise residential buildings should be restricted to use.” Zhang Xiaosong introduced.

He believes that a better way to solve the heating charging problem and effectively save energy is to measure households separately. According to the deployment of the Ministry of Housing and Urban-Rural Development, Beijing has already requested that the heating system for new buildings be designed and constructed in accordance with the requirements of separate households. Otherwise, it will not be accepted. But what is bothered now is how the old building will be measured and transformed.

According to the pilot conditions in Tianjin, the cost of reforming the heat supply system measured by households is approximately 2,000 yuan per household. The Ministry of Housing and Urban-Rural Development has requested northern cities to implement the household measurement in conjunction with the building energy-saving renovation project. In the household metering and transformation, the radiators in each room of each household will also be equipped with thermostat knobs to facilitate the residents to flexibly control the room temperature.

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