JPS62155449A - Control device for heat storage vessel - Google Patents

Abstract

PURPOSE:To make the facilities of a heat storage vessel small and save energy by installing a control means which controls a supply means providing energy stored in a heat storage vessel to a demand system based on a forecast means for energy consumption by a demand system and a forecast for possible energy supply amount of a heat source system. CONSTITUTION:A user input a day schedule for hot water demand via a keyboard 5. Its content is indicated on a display 7 and is able to be confirmed. The input schedule is stored in the memory part 5 of a controller 3. The logical judgement part 4 of the controller 3 forecasts the outside condition based on meterological data from a meterological sensor 8 and outside meterological forecast information from an antenna 9 and forecasts possible energy supply amount detected by a control sensor 10 after various data are compared with a load schedule in the part 5 and selects an operation pattern for optimizing energy consumption in satisfying demand to control the operation of a pump 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat storage tank control device particularly suitable for use in a centralized heating, cooling and hot water supply system of an apartment complex.

BACKGROUND OF THE INVENTION Conventionally, this type of thermal storage tank generally stores hot water for hot water supply or space heating, or cold water for row rooms, and supplies energy directly to the load to satisfy its demand. do.

An example of use in a hot water storage tank will be described below with reference to FIG. 2. In Figure 2a, 100 is a hot water storage tank, 1
01 is a water supply port communicating with the lower part of the hot water tank 100; 122
is a hot water supply port communicating with the upper part of the hot water storage tank 100. In such a hot water storage tank 100 for hot water supply, in order to suppress heat radiation from the hot water storage tank 100 and improve heating efficiency, a vertical temperature profile 1 shown in FIG.
As is clear from 04, a control method is adopted in which temperature stratification 103 is formed and heating is not performed until the remaining hot water in the hot water storage tank 100 falls below a certain level.

Problems to be Solved by the Invention Normally, the demand for hot water in a residence is mainly for hot water supply to the bath, but also for washing after each meal, laundry, washing, etc., and the hot water generation pattern is based on the hot water supply load factor shown in Figure 3. As is clear from 105, there is a concentration from evening to night. but,
In this case, in the conventional configuration described above, the amount of hot water remaining in the hot water storage tank 100 exceeds the limit level in the middle of the night immediately after the load is concentrated, and not only does it become necessary to supply energy from outside, but also when a large amount of hot water is used. 1. There is a risk that the heating will not be completed in time and water will come out, which is the so-called "out of hot water" phenomenon.
A hot water storage tank 100 with a large capacity (approximately 400 tanks per household) was required to satisfy the daily demand for hot water supply. In addition, when trying to heat with a system that uses natural energy as a heat source such as solar heat or air source heat pump,
Normally, the heating condition is at night, when the hot water supply to the bath is finished, so solar heat cannot be used, and air source heat pumps are forced to operate under inefficient conditions when the outside temperature is low at night. There's a problem.

If a heat storage tank is used as a heat source for a water heater such as a heat pump or boiler, the upper and lower temperature limits of the heat storage tank can be controlled more leniently than in the case of direct hot water supply, so daytime solar heat and air heat sources can be used more efficiently. Although it is possible to adopt a control method that collects heat, if as much energy is collected as possible, it will be wasted due to the balance with the load, which will actually reduce the overall energy efficiency. In the case of hot water supply, this risk is particularly great in the summer when the load is reduced.

To solve this problem, a control method called predictive control has been proposed for office buildings, which attempts to predict the load and external conditions, effectively acquire natural energy, and supply it as efficiently as possible. However, the load
Both external conditions are difficult to predict, and in some cases, control will tend to increase the amount of heat storage on the safe side, and it is difficult to say that energy will be used sufficiently effectively. In particular, since the generation of load is left to the unilateral discretion of the user, it is very difficult to predict, and there is a problem in that it is impossible to eliminate the risk of running out of hot water due to sudden use.

Therefore, the present invention improves prediction accuracy, makes it possible to use energy effectively, and can flexibly respond to changes in usage schedules and prediction errors, thereby reducing the size of heat storage tank equipment and saving energy. It is an object of the present invention to provide a heat storage tank control device that can achieve

Means for solving the problems and technical means of the present invention for solving the above problems are means for supplying energy stored in a heat storage tank to which energy is supplied by a heat source system to a demand system; A means for predicting the amount of energy used by the demand system, a means for predicting the amount of energy that can be supplied by the heat source system, a means for transmitting information to energy users to influence the amount of energy used by the demand system, and each of the above. The apparatus includes means for controlling the supply means based on information from the prediction means.

action The effects of the above technical means are as follows.

That is, the system allows the user to input the schedule of hot water demand for the day into the control means, predicts the amount of energy used, predicts the amount of energy that can be supplied, and transmits information in case of sudden changes in conditions on the user's side. The supply means can be controlled with high efficiency while reducing waste. Therefore, prediction accuracy is improved, energy can be used effectively, and prediction errors can be dealt with flexibly.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is a heat storage tank, and energy is supplied from a heat source system (not shown) such as natural energy. 2 is a system that demands the energy stored in the heat storage tank 1 (not shown)
This is a heat pump that supplies 3 is a control device, which includes a logic control section 4 and a storage section 5 for controlling the operation of the heat pump 2.
It is composed of. 6 is the schedule for hot water demand;
That is, this is a keyboard for inputting energy usage reservations into the control device 3, and the schedule input by this keyboard 6 is stored in the storage section 5 of the control device 3.

Reference numeral 7 denotes a display consisting of a C-T, which allows the user to display and confirm the contents of the hot water demand schedule inputted from the keyboard 1, and also displays information on the amount of energy used based on the calculation results from the control device 3. Information for influencing is displayed so that the user can confirm it. 8 is a weather sensor for providing weather information to the logic control unit 4 of the control device 3; 9 is an antenna for providing external weather prediction information to the logic control unit 4 of the control device 3;
Reference numeral 10 denotes a control sensor that is provided in the heat storage tank 1 and provides data for predicting the usable amount of energy to the logic control unit 4 of the control device 3.

Next, the operation of the above embodiment will be explained. The user inputs the hot water supply demand schedule for Todoroki from the keyboard 6. The contents are displayed on the display 7 and can be confirmed. The input schedule is stored in the storage section 5 of the control device 3.

The logic judgment unit 4 of the control device 3 predicts external conditions based on weather data from the weather sensor 8 and external weather prediction information from the antenna 9, and also determines the load schedule of the storage unit 5.
(In the case of apartment complexes, the total load schedule for the entire residential building) is compared, and the amount of energy that can be supplied is predicted by the detection of the control sensor 10, and the operation optimizes energy usage while meeting demand. A pattern is selected and the operation of the heat pump 2 is controlled. At this time, since it is difficult to use if the user inputs the usage schedule every day, the control device 3 itself learns the user's actual usage pattern and controls according to the normal pattern if there is no specific instruction. You can also do this. If the pattern still deviates from the normal pattern due to unforeseen circumstances, the user who made the request is requested to change the request by giving information on the display 7 to point out the energetic irrationality brought about as a result of the change. At the same time, it is possible to make adjustments to meet the demands as much as possible, and to avoid forcing the user to experience inconvenience in use.

In this way, the load generation schedule is known in advance, so if the load is expected to be large at night, the heat storage tank 1
By adjusting the upper limit control temperature of the system, it is possible to collect sufficient heat during the day when there is solar heat, and prepare for use at night. In addition, even if the temperature of the heat storage tank 1 drops below the annual control temperature at night, the temperature of the heat storage tank 1 will not be forced to collect at a low efficiency at night due to the expected weather conditions for the next day and the load reservation. It is possible to perform control such as lowering the temperature below the lower limit temperature and recovering it with solar heat the next day.

Effects of the Invention As is clear from the above explanation, according to the present invention, the amount of energy used by the demand system is predicted by the prediction means, the amount of energy that can be supplied by the heat source system is predicted by the prediction means, and the amount of energy used by the demand system is predicted by the prediction means. The energy user is provided with information for influencing the energy consumption through the transmission means, and the energy supply means for the heat storage tank is controlled by the control means based on the information from each of the above-mentioned prediction means. In this way, by providing a means to predict the reserved amount of the load that is the target of prediction control, prediction accuracy can be improved, and by providing an information transmission means for communicating with users, it is possible to It can flexibly respond to changes and prediction errors. Therefore, it is possible to downsize equipment such as a hot water storage tank, which conventionally had an excessive capacity for safety reasons, and it is possible to save energy by optimizing energy operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the heat storage tank control device of the present invention, FIG. 2a is a schematic explanatory diagram of a conventional hot water storage tank,
Figure 3 is a graph showing the vertical temperature profile, and Figure 3 is a graph showing the state of hot water demand in a residence. ]... Heat storage tank, 2... Heat pump, 3... Control device,
・1...Logic control section, 5...Storage section, (3.Keyboard, 7.--Display, 8..Weather sensor, 9..
・Annotate, 10... Control sensor. Name of agent: Patent attorney Satoshi Nakao and one other person Figure 1 Figure 2 1θl Figure 3 Shin

Claims (5)

[Claims] (1) Means for supplying energy stored in a heat storage tank to which energy is supplied by the heat source system to the demand system, means for predicting the amount of energy used by the demand system, and means for predicting the amount of energy that the heat source system can supply. A heat storage device comprising: a means for transmitting information to an energy user to influence energy usage in a demand system; and a means for controlling the supply means based on information from each of the prediction means. Tank control device. (2) The heat storage tank control device according to claim 1, wherein the energy supply means is a heat pump. (3) The heat storage tank control device according to claim 1, wherein the means for predicting energy usage includes means for inputting usage reservation information from energy users. (4) The heat storage tank control device according to claim 1, wherein the means for predicting energy usage has a learning function from actual usage. (5) The heat storage tank control device according to claim 1, wherein a CRT is used as the information transmission means.