Method for heating or cooling rooms in a building

Abstract

A method for heating or cooling rooms in a building with a temperature-controlled system, the temperature-controlled system has a central heater or cooler with a run-around coil system having a supply line and a return line, a central circulation pump for circulating a temperature-control fluid in the run-around coil system, at least two heat exchanger devices that thermally supply one room of the building and are connected to the supply line and the return line of the run-around coil system, one valve with an actuator for each heat exchanger device, one room temperature sensor for each thermally supplied room, and a central open- and closed-loop control unit that is connected to the actuators of the valves and to the room temperature sensors. The method serves to bring about, in the thermally supplied rooms, a temperature transition from a starting state to an end state, with corresponding room temperature setpoint values.

Claims

1. A method for heating or cooling rooms in a building having a temperature-control system, wherein the temperature-control system comprises: a) a central heat generator or cold generator having a combined circulation system having feed and return lines; b) a central circulating pump for the circulation of a temperature-control fluid in the combined circulation system; c) at least two heat exchanger units, which each thermally supply one room of the building, and which are each connected to the feed and return lines of the combined circulation system; d) one valve having actuating drive per heat exchanger unit; e) one room temperature sensor per thermally supplied room; and f) a central control and regulating unit, which is connected to the actuating drives of the valves and to the room temperature sensors; wherein a temperature transition is completed with the heating or cooling in the thermally supplied rooms in the building from a starting state to an end state different from the starting state having corresponding room temperature target values, characterized in that during the temperature transition, one proceeds according to at least two preselected temperature stages lying between the starting state and the end state according to the following algorithm: i) firstly all valves are completely opened by the central control and regulating unit; ii) as soon the temperature reported by the corresponding room temperature sensor has reached a first temperature stage in a room, the relevant valve is completely closed; iii) as soon this first temperature stage is also reached in a next room, this valve is also completely closed; iv) the procedure is continued with each further room until the first temperature stage is also reached in a last room; v) all valves are then completely opened again until a second temperature stage is reached in a room, whereupon the relevant valve is completely closed, and the same procedure is used until this second temperature stage is also reached in a last room; vi) all valves are completely opened again, and the algorithm is continued until all thermally supplied rooms have reached the room temperature target value thereof; vii) after reaching a room temperature target value, a regulating phase follows, in which the temperature in the relevant room is maintained by the central control and regulating unit at an end temperature level corresponding to the room temperature target value.

2. The method according to claim 1, characterized in that the temperature-control system is a heating system and/or a cooling system.

3. The method according to claim 1, characterized in that each heat exchanger unit comprises at least one heat exchanger, and the heat exchangers are temperature control elements through which a temperature-control fluid can flow.

4. The method according to claim 3, characterized in that the heat exchangers are selected from heating elements and/or cooling elements.

5. The method according to claim 3, characterized in that the heat exchangers are selected from radiators and underfloor heating systems.

6. The method according to claim 1, characterized in that the temperature-control fluid is a heat carrier medium, preferably water.

7. The method according to claim 1, characterized in that the temperature-control fluid is brought to a feed temperature suitable for heating or cooling by the central heat generator or cold generator.

8. The method according to claim 1, characterized in that at least three rooms of the building are thermally supplied by heat exchanger units.

9. The method according to claim 1, characterized in that the building is stationary or mobile.

10. The method according to claim 1, characterized in that the algorithm comprises at least three preselected temperature stages between the starting state and the end state, which is different therefrom.

11. The method according to claim 10, characterized in that a constant step size is selected between the temperature stages.

12. The method according to claim 11, characterized in that the step size is in the range of 0.1 to 1.0° C., preferably 0.5° C.

13. The method according to claim 1, characterized in that a next temperature stage in the algorithm is only undertaken when a specific temperature stage has been reached in all thermally supplied rooms.

Description

(1) The invention will be explained by way of example and in a nonrestrictive manner on the basis of a schematically shown curve in FIG. 1.

(2) FIG. 1 shows the temperature curve in three rooms during a temperature transition according to the method according to the invention.

(3) In this example, a heating procedure is shown in a temperature (T)/time (t) diagram. The method V according to the invention begins in a starting state T.sub.A, in which the temperature in the three rooms can be different or identical, as shown. With the opening of the three valves, the temperature-control fluid, the monitored feed temperature of which is higher than the room temperature to be reached in the end state T.sub.E, begins to flow to the three heat exchanger units, and it flows through the heat exchangers. After a start-up time, the room temperatures begin to rise at different speeds. The room most remote from the heat generator having the longest line and the greatest flow resistance heats up most slowly. Three preselected temperature stages S.sub.1, S.sub.2, and S.sub.3 are defined between the starting state T.sub.A and the end state T.sub.E in the illustrated example. As soon the fastest heating room reaches the stage S.sub.1 at the point R.sub.1, the associated valve is completely closed. A possible slight overshoot of the room temperature was neglected in the graphic illustration. In the two other temperature-control circuits, the temperature-control fluid flows somewhat faster from R.sub.1 (and these room temperatures rise somewhat faster), because the pressure of the central circulating pump is now available to them which had previously been distributed to all three temperature-control circuits. As soon as the temperature of the second room has also reached the temperature stage S.sub.1 at the point R.sub.2, this associated valve is also completely closed. From then, the delivery pressure of the circulating pump exclusively acts on the temperature-control circuit of the last room, the temperature of which also reaches the stage S.sub.1 at the point R.sub.3 in a slope which is somewhat still steeper. Subsequently, all valves are completely opened again (i.e., the last valve remains open and the other valves are reopened) and the algorithm is continued in the same manner until one room temperature after another reaches the second temperature stage S.sub.2. R.sub.1, R.sub.2, and R.sub.3 again show the points at which the temperature of the fastest, the second-fastest, and the slowest rooms reach this temperature stage. It is also to be noted in this regard that R.sub.1, R.sub.2, and R.sub.3 are not to be associated with fixed rooms, but rather the sequence in reaching the respective temperature stage. It is possible that the sequence can change in a following algorithm step with respect to individual rooms; however, it generally remains the same, as shown in FIG. 1 by the dashed lines. Reaching the third temperature stage S.sub.3 also plays out according to the same pattern again in the algorithm. The slowest heating room is also always carried along from temperature stage to temperature stage in this manner so that the temperature difference between the fastest heating room and the slowest heating room is also kept as small as possible during the transition. The last step in FIG. 1 shows the approximately simultaneous reaching of the individual room temperature target values in the end state T.sub.E after reaching the temperature stage S.sub.3 and the reopening of the valve. These target values could also be identical if the same temperature, i.e., the same end temperature level, is desired in all thermally supplied rooms. With reaching the room temperature target values, the algorithm of the method according to the invention has arrived at the goal, and a regulating phase follows in which the room temperatures are kept at the end temperature levels thereof, corresponding to the room temperature target values.

(4) As a supplement to FIG. 1, it is also to be noted that if significantly lower room temperature target values were to apply for one room or multiple rooms, which therefore are already reached after an earlier temperature stage, these rooms would then simply be removed from the algorithm, and the algorithm according to the invention would be continued with the remaining rooms having higher room temperature target values until all room temperatures have reached the target value thereof.

(5) Moreover, a classification of the two diagram axes was omitted in FIG. 1, because the temperature stages between T.sub.A and T.sub.E can be selected arbitrarily (the step size between the temperature stages does not have to be constant), and because the method is not dependent on a measurement of the time or of time intervals, but rather only on the state detection of the room temperatures with respect to the temperature stages and the end target values.

(6) A surprisingly simple, alternative method can thus be provided by the present invention, using which the problem of poorly hydraulically and thermally supplied rooms during temperature transitions can be solved with comparatively little effort. In this manner, a slowly reacting room is also taken along step-by-step and without great delay to a new temperature level. A more remote room, for example, a room in a schoolhouse, also soon comes to a comfortable temperature upon heating.