Does the heating occupancy rate refer to a residential area or a building? Is the heating occupancy rate by district or by building?

Lead: There are many different classification methods for heating systems, such as central heating, thermal power plant heating, and regional boiler room heating. Then, do you know whether the heating occupancy rate is calculated by the district or by the building? Does the heating occupancy rate refer to a residential area or a building? Let's have a look.

Is the heating occupancy rate by district or by building?

The occupancy rate of heating is based on the district. According to the regulations of some residential areas, the occupancy rate of general residential areas is above 40%, and the occupancy rate of unit buildings is above 60%, which can provide heating. However, the heating conditions in some communities have also been lowered. For example, some residential areas can also provide heating when the occupancy rate reaches 30% or 50%. You need to consult the property of this residential area for details.

What conditions do residential heating need to meet?

Generally speaking, in order to realize heating in a newly-built residential area, the developer needs to apply to the corresponding heating enterprise first, coordinate with the heating enterprise to build the heat exchange station in the residential area, pay the supporting fee, and wait for the heating facilities to pass the acceptance, so that the residential area and the unit building can realize heating separately. The occupancy rate of general residential quarters needs to reach 50%, and the occupancy rate of units needs to reach 70%.

What is the occupancy rate of residential heating?

It depends.

Many friends are curious about the occupancy rate of district heating. Generally speaking, the occupancy rate of heating is not stipulated by the state, but the occupancy rate stipulated by regional heating companies before heating. There is a simple reason. Low occupancy rate will waste resources. In order to avoid waste of resources, the regional heating company will propose that the occupancy rate of the community should reach more than 70%, and the local heating company will consider providing heating for the owners of the community. If the occupancy rate of the community is only 60% to 50%, then the owners, property companies and heating companies can also negotiate.

Characteristics of heating system

Advantages of heating system with water as heat medium: stable room temperature and good sanitary conditions; The water temperature can be adjusted centrally, which is convenient to adjust the heat dissipation according to the outdoor temperature change; The service life of the system is long, generally 25 years.

Disadvantages of heating system with hot water as heating medium: when low-temperature hot water is used as heating medium, pipes and radiators dissipate more heat and the initial investment is large; When the building is high, the hydrostatic pressure of the system is high, and the radiator is easy to overpressure; The thermal inertia of water is large, and the speed of room heating and cooling is slow; When the hot water is not completely discharged, it is easy to cause freezing and cracking accidents.

Hot water heating system can be divided into gravity circulating hot water heating system and mechanical circulating hot water heating system according to their different pressures. The mechanical circulating hot water heating system is a heating system which is composed of a boiler, a water pump and a user's radiator connected by pipes.

In the heating system, the connection mode of each radiator and pipeline is called the form of cooling system. The forms of heat dissipation system in hot water heating system can be divided into vertical and horizontal.

(1) vertical type

Refers to the way of connecting radiators in the same vertical position with risers. According to the connection mode of radiator and riser, it can be divided into single-pipe system and double-pipe system. According to the arrangement position and water supply direction of the main supply return pipe, it can also be divided into several ways, such as upper supply and lower return, lower supply and lower return, and lower supply and upper return.

(2) Horizontal type

Refers to the way of connecting radiators in the same horizontal position (same floor) with horizontal pipes. It can be divided into two ways: sequence and jump. The advantages of sequential type are simple structure and low cost, but each radiator cannot be adjusted independently; Leaping type, each radiator can be adjusted independently, but the cost is high and the heat transfer coefficient is low.

Advantages of horizontal system over vertical system

① Simple structure and good economy.

(2) The pipeline is simple, and there is no riser passing through each floor, so the construction is convenient.

(3) The horizontal pipeline can be laid in the ceiling or in the trench for easy hiding.

④ It is convenient for hierarchical management and adjustment.

However, the exhaust mode of horizontal system is more complicated than that of vertical system. It needs to set a cold air valve on the radiator to disperse the exhaust, or connect a wind pipe in series with the radiator on the same floor to concentrate the exhaust.

Steam heating system can be divided into high pressure and low pressure according to different steam pressures. The characteristics of steam heating system are as follows.

① The surface temperature of radiator in steam heating system is high.

② Steam heating system is more energy-saving than mechanical circulating hot water heating system.

③ The thermal inertia of the steam heating system is small.

④ High pressure steam heating system saves pipeline.

⑤ Steam heating system is suitable for high-rise buildings.

The heat loss of steam heating system is large.

Return pipe steam heating has a short service life.