According to Fan Long, a senior engineer at two institutes of Beijing Architectural Design and Research Institute, there are two main types of heating systems in residential buildings, namely, central heating system and household heating system. Centralized heating means that the central heat source transfers heat to the user through the pipeline. At present, central heating in Beijing market is mainly boiler and urban heat network heating, household heating includes wall-mounted furnace heating and electric heating.
Although there are some unfavorable factors in central heating, such as heat loss of pipeline network, energy consumption of pipeline transportation, high initial construction cost, and uneven cooling and heating due to construction or operation of management plain, Fan Long believes that central heating is a relatively economical, energy-saving, safe and environmental protection heating system compared with household heating. Due to the special person responsible for operation and management, centralized heating operation efficiency is high and automatic monitoring system, regular inspection and maintenance every year, the safety performance is relatively high; from the environmental protection point of view, smoke exhaust and other environmental pollution can be centralized treatment, compared with each household smoke exhaust is much more environmentally friendly.
However, natural gas pipelines and urban heat networks do not cover the whole city, and household heating is still needed in some places. On the other hand, centralized heating needs to build a boiler room, which not only occupies a certain area of land, but also requires a safe distance from the surrounding buildings, which has an impact on the layout of the whole community. For economic considerations, some developers will choose small household boilers for heating. Compared with centralized heating, household heating is flexible, the use time is controlled by the owner himself, and the household metering charge can be realized according to the actual consumption of the owner; in addition, the boiler room and outdoor pipelines can be saved.
In addition, the cost of household heating is related to living conditions and environment. If only a few owners live in the whole building, or neighbors do not have heating, the heat will flow to all directions, and the heat consumption is large. In addition, the service life of common household wall-hanging furnace is not long, and the later maintenance and depreciation costs are high.
Ground warmth is comfortable but there are many precautions
Ground heating is divided into electric heating and water heating. At present, most of the floor heating is water heating, that is, water pipes are laid on the ground, hot water through radiation and convection form of heat transfer to the room. Because the heat is transmitted from the bottom to the top, which meets the physiological needs of human beings, the feeling will be very comfortable; because people feel the temperature of the geothermal environment is 1 to 2 degrees higher than the actual temperature, so it is more energy-saving than other heating methods. Because all pipelines are laid underground, the layout of the owner's house is unrestricted.
But the heating effect of floor heating is not perfect in imagination. Because heat is mainly transmitted by radiation, the obstruction of furniture will affect the heat dissipation effect. In addition, in the north-facing bedroom and bathroom, due to the relative need for more heat, and beds, wardrobes and tables removed from the bedroom, the remaining ground space is very small, due to the low temperature of the warm water, the need for a little more heating.
Ground heating has certain limitations on water temperature, so it is necessary to set the outlet water temperature of wall-mounted furnace. Lower return water temperature of ground heating may affect the service life of ordinary wall-mounted furnace and increase the later maintenance cost. Because of structural reasons, it is better to choose reinforced floor or floor tiles when using floor heating. The heat conduction effect is good. Solid wood floor or composite floor may cause cracking. Carpet will increase heat resistance and affect heating effect, so carpet can not be used. In addition, it is better to choose legged furniture to reduce thermal resistance.
Caution should be taken in changing central heating to floor heating
Experts from Enomeijia said that in order to make floor heating, it is necessary to add a thermal insulation layer not less than 2 centimeters thick on the floor, lay a pipeline layer about 5 centimeters high, and then leveling and laying floors or floor tiles. In this way, the floor heating will be 4-5 centimeters higher than the ordinary floor floor floor method, which will reduce the room net height, and the ground improvement may also affect the door opening.
Heating mode is planned and designed by professionals during construction. There must be some reason. Owners should not change easily because of beauty or other reasons.
The above contents are published by Jinan Ground Heating Installation. More relevant information can be consulted by clicking on our official website: http://www.ycepec.com.