SU542893A1 - The method of regulating the heating load of the building - Google Patents

Description

The invention relates to methods for regulating the heating load of buildings and can be used to regulate the heat supply in separate front heating systems.

There is a known method of controlling the heating load of a building according to the temperature of the outer wall of the house, the temperatures of the internal and external air, and the wind speed 1. However, this method is complicated in instrumentation, as well as in setting up and operating in relation to the conditions of heat networks. In addition, the signal for the internal air temperature, brought from one room, is unrepresentative. For control systems operating on the signals of the internal temperature of one or even several rooms, the phenomena of a false controller response due to disturbances caused by the activity of people in these rooms are characteristic.

Closest to the invention in its technical essence is a method for regulating the heating load of a building, which consists in the fact that the control action is generated by the signals of the outdoor air temperature sensors and the temperatures of the direct and reverse supply water 2. The disadvantage of this method of regulating the heating load is The sensor for outdoor air temperature sensor does not take into account the effects of solar radiation and wind speed on a residential building.

The proposed method allows to increase the economy while maintaining the simplicity of the automatic control system. This is achieved by using the ratio between the difference between the average water temperature in heating devices and the set indoor air temperature and the difference between the set indoor air temperature and the outer surface temperature of the building wall as a parameter that characterizes comfortable conditions in the room.

On the one hand, the input heat flux from the heating system is completely characterized by the temperature of the surfaces of the heating devices, determined by the temperatures of the forward and reverse supply water of the heater. On the other hand, one of the most important heat loss characteristics of the building zone is the heat flux through the walls of the building, ultimately determined only by the temperature gradient of the indoor air in the rooms and the outer surface of the building wall. The temperature of this wall surface depends on both the temperature of the outside air and the effect

solar radiation, wind speed and direction, humidity of the outside air, humidity and reflectivity of the outer surface of the wall. Thus, the outer surface of the building wall integrates a whole range of external influences on the adjustable object.

Analytically specified parameter can be expressed by the formula

 (Tag + 7cx) - TBB

to

TBB - st

where Gsg is the temperature of the network hot (direct) water;

Tc: a is the temperature of net cold (reverse) water; 7vB - internal air temperature in

premises (preset); TCT - outer surface temperature

walls.

The drawing shows a graph of the indicated temperatures as a function of the outdoor air Hzv temperature, explaining the described method of control at a constant predetermined temperature in the room (residential building of the series 1-464-A.

In order to implement this method of regulation, it is necessary to have a temperature schedule that is found experimentally or analytically for each type of building.

For the simplest control system that implements the proposed method (at a constant predetermined temperature in the room), the temperature sensors of the network of hot and cold water and the temperature of the outer surface of the building wall are switched according to the direct compensation circuit sequentially at the controller input.

Claims (2)

1. Author's certificate number 224767, M. Kl.2r 01K 3/06, 1968. 2. Materials of the short-term seminar 22-24 June 1971, ed. S. A. Chistovich “Automation of heating boiler systems of heat supply and heating. L., 1971. t: g, BUT 73О720 .. JW-700 .. 90 80 70 60 50 hell 30 20 W Oh Thf ° l