DE4446974A1 - Method to heat room rapidly - Google Patents

Abstract

A boiler and circulation pump controller have sensing elements to monitor the various conditions which influence the operation of the heating system. The boiler (3) provides heated water at outlet (16), which may be circulated by the pump (6) to heat the room (19). Sensors (9,10,11), connected to the controller (8), detect the temperatures of the outside air, boiler water outlet and room air respectively. A preset reference temperature control (12) and a clock (13) are also provided. A diverter valve (16) and by-pass (14) cause circulation through the boiler to be omitted when sensor (10) detects a sufficiently high boiler water temperature.

Description

The invention relates to a method for rapid on heating a room according to the preamble of claim ches.

Rapid heating is hardly possible with the conventional methods possible or only via the detour that a higher one Target value is given and therefore the usual slowdown the increase in the room temperature as the room temperature approaches temperature to the specified target value is avoided. Everything In this way, however, there is only very little acceleration of heating can be reached.

The aim of the invention is to avoid this disadvantage and a To propose methods of the type mentioned at the outset that a ra heating a room after a lowering phase or a Switching off the heating system by using the power re serving the radiator allows.

According to the invention, this is done in a method of the beginning mentioned type by the characterizing features of the patent reached.  

Through these measures, the heat emitted by the or the heater body can be increased significantly, resulting in an ra heating the room. This also makes it possible to reduce the amount of energy required to heat a room other. This can result in longer heating downtimes plant, especially the burner of the heating system, approved as the room after a further drop in the Room temperature quickly returned to the intended temperature can be brought. This results in be over a day seeks a smaller number of starts of the burner and there with also a lower emission of pollutants.

The intended increase in the flow temperature is special very essential for low-temperature heating systems, because with these the flow temperature increased to a very noticeable extent can be and therefore a particularly rapid heating of a Space is possible.

The invention will now be explained in more detail with reference to the drawing.

Show:

Fig. 1 shows schematically a heating system and

Fig. 2 is a diagram of the heat output of a radiator at different flow temperatures and water mass flows.

A heating system has a heat exchanger 2 acted upon by a burner 1 , which two components are arranged in a combustion chamber 3 .

The heat exchanger 2 is connected via a flow line 4 and a return line 5 with a heating element 19 to a space 19 heating element 15 , a circulation pump 6 being arranged in the return line 5 .

The circulation pump 6 is driven by a motor 7 whose speed can be regulated and which is controlled by a controller 8 . This controller 8 is connected to an outside temperature sensor 9 and a sensor 10 which detects the flow temperature. Wei ter the controller 8 has a room temperature sensor 11 and a target value transmitter 12 .

The controller 8 calculates a corresponding flow temperature as a function of the outside temperature and the predetermined target room temperature, which can be regulated via a modulating burner 1 or a bypass 14 which can be controlled via a mixing valve 16 .

Either a drive 17 of the mixing valve 16 or a solenoid valve 18 of the modulating burner 1 is connected to the controller 8 .

After an adjustable and definable lowering phase of the room temperature of the room 19 and thus also the heating system via a clock 13 of the control 8 , the flow temperature is temporarily above the value required for reaching the set target value of the room temperature in order to accelerate the heating of the room 19 raised and at the same time the speed and thus the delivery rate of the circulation pump temporarily increased. This ensures that the heat output by the Heizkör by arrangement 15 in the (n) associated room (s) 19 increases significantly, whereby the room temperature increases more quickly. For example, the flow temperature can be raised from 45 ° C to 90 ° C and the heating medium throughput doubled.

Fig. 2 shows the relationship between the Vorlauftempera ture, the flow and the performance of the radiator.

The diagram shows an example that the performance of the radiator varies over a wide range can be.

One assumes an initial situation in which the radiators are operated with a flow temperature of 45 ° C and a return temperature of 35 ° C and a water mass flow ratio of m / m _N of 0.5, so there is a temperature difference t _V -t _j = 25 ° C.

Here, t _{V is} the flow temperature in ° C, t _{j is} the room temperature in ° C, t _{R is} the return temperature, m is the actual mass flow of the heating water in kg / h and m _{N is} the nominal mass flow of the heating system in kg / h, with the room temperature also 20 ° C was set. The nominal mass flow obeys the equation:

Q = m · c _p Δϑ.

Here Q mean the heat output of the heating system in [W], c _p the specific heat capacity of the heating medium, for example the water with which the heating system is operated, and Δϑ the difference between t _v -t _r in [K]. Q is 500 W. Thus, there is point 20 in FIG. 2, which in the design point of the heating system leads to a normalized heating output of Q / Q _n = 0.25 at a pump speed of n = 750 min ^-1 . This corresponds to a heat output of 0.5 kW.

If the flow temperature t _{V is} briefly increased to 90 ° C, this results in a temperature difference of t _V -t _j of 90 ° -20 ° = 70 ° C, and at the same time the water mass flow becomes brief by increasing the pump speed, for example 750 rpm increased to 1850 rpm, that is m / m _N = 1, the diagram in FIG. 2 shows an increase in the heating power of the radiators from 0.25 to 1 and thus by 300% in point 21 .

The increased values for the flow temperature and the pumps speeds are reduced when the actual room temperature a certain distance to the target room temperature has, for example, 1 K.

Claims (1)

Process for the rapid heating of a room with a heating system with at least one radiator which can be flowed through by a heating medium, the flow temperature being regulable, characterized in that the flow temperature is above a temperature which is intended for operation at the design point, for example 45 ° C , or depending on external conditions, for example the outside temperature, fixed value, for example to 90 ° C, is increased, and the throughput of the heating medium is increased, for. B. is doubled until the room temperature has a near a room temperature seen before, for example 20 ° C, value of for example 19 ° C he has.