JPS62134439A - System for controlling sets of heat source devices - Google Patents

Abstract

PURPOSE:To reduce the power cost of heat source devices by conducting a thermal load estimation on the basis of actual data relative to past heat storage quantities and meteorological data to make up a plan for operating the heat source devices and correcting the operation plan on the basis of meteorological data on that day to carry out control of the number of the heat source devices. CONSTITUTION:The operation plan of a plurality of heat source devices is beforehand set in a pattern setter 7 of a heat source control unit 3. A signal from the setter 7 enters a first pattern correcting device 8, and computes a past heat storage quantity from the temperature of a heat storage tank and a flow quantity of inlet heat to carry out estimation of the quantity of heat after the computation hour and to make up an estimated load curve. This curve is stored in a pattern memory device 9. A second pattern correction device 10 computes the enthalpy from the temperature and humidity of external air on that day, and corrects the estimated load curve to make up a plan for operating the heat source device by a heat source control judging part 11 and delivers the control output of the number of heat source devices.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for controlling the number of heat source devices, and particularly relates to a method for controlling the number of heat source devices,
The present invention relates to a method for controlling the number of heat source devices suitable for a heat source system including a heat storage device that stores the amount of heat from the heat source devices and a heat source control device that controls the heat source devices.

[Background of the invention]

Conventional methods for controlling the number of heat source devices include operation control methods that convert the usage status of heat source devices on the day into the amount of heat in a heat storage device, compare the above heat amount with a preset reference value, and determine the number of heat source devices. Since the control method was to control the number of heat source devices based on a preset relationship between the temperature measured by a temperature sensor installed in the fixed tank of the heat storage device, the number of heat source devices, and the rated capacity, the heat storage device was fully utilized. This has the disadvantage of accumulating wasteful heat and causing the heat source device to operate more than necessary.

Also, what is the load prediction method used in the above control method?

This method predicts the amount of heat, and is different from the load prediction method shown in Japanese Patent Application Laid-Open No. 59-5307, which predicts active load power using a load prediction curve, both in method and target. In addition,
There are no known examples of a control method that combines heat load prediction and control of the number of heat source devices.

[Purpose of the invention]

An object of the present invention is to ensure the necessary amount of heat used on the load side based on the heat load prediction, to effectively utilize a heat storage device, and to minimize the operating time or power consumption of the heat source device. The purpose of the present invention is to provide a method for controlling the number of heat source devices.

[Summary of the invention]

A feature of the present invention is that a heat source device, a heat storage device that stores the heat amount produced by the heat source device, performs a heat load prediction based on past performance data on the amount of heat stored in the heat storage device and weather data, and calculates a predicted load curve for each predetermined time unit. and a control means for controlling the number of heat source apparatuses by correcting the operation plan made by the operation measuring means using the weather data of the day. The point is that

[Embodiments of the invention]

The present invention will be described in detail below with reference to the embodiments shown in FIGS. 1, 2, and 5, and FIGS. 3 and 4.

FIG. 1 is an overall configuration diagram showing an embodiment of the method for controlling the number of heat source devices of the present invention, and shows the case of a heat source system having a heat storage device (heat storage tank) in a building. In FIG. 1, 1 is an outside air thermometer, 2 is an outside air hygrometer, 3 is a heat source control device, and the heat source control device 3 inputs outside air temperature from the outside air thermometer 2, outside air humidity from the outside air hygrometer 2, Calculate outside air enthalpy.

Further, 4-1 to 4-n are heat source devices, 5-1 to 5-m are heat storage thermometers, and 6 is a heat storage device.

The heat source control device 3 includes thermometers 5-1 to 5-1 in the heat storage device 6.
The temperature inside the heat storage device 6 is also input from 5-m, the residual heat amount in the heat storage device 6 is calculated from the flow rate in the device, and the number of operating heat source devices 4-1 to 4-n is controlled.

FIG. 2 is a configuration diagram showing an embodiment of the heat source control device 3 of FIG. 1. The operation plan of the heat source devices 4-1 to 4-n is set in advance in the pattern setting device 7 of the heat source control bag @3, and the past heat storage amount is calculated from the heat storage tank temperature and inflow flow rate in the first pattern correction device 8. The calculation is performed to predict the amount of heat after the calculation time, and a predicted load curve 12 shown in FIG. 3 is created. Note that the dotted line indicates the average amount of heat for the past α days, and the solid line indicates the base amount of heat.

This predicted load curve 12 is stored in the pattern storage device 9. In the second pattern correction device 1o.

The enthalpy is calculated from the outside air temperature and the outside air humidity, the predicted load curve 12 is corrected, the heat source control determination section 11 formulates an operation plan for the heat source devices 4-1 to 4-n, and sends out a control output.

Next, a method for calculating the predicted load heat amount, a method for correcting the predicted load curve 12 using outside air enthalpy, and the heat source devices 4-1 to 4
-n number control method will be explained in detail.

(1) Method for calculating predicted load heat amount based on past performance data Calculation of predicted load heat amount is performed at each fixed cycle (control cycle) using the following equation. That is, at time t, (predicted load heat amount) = (base load heat amount) - ((base load heat amount) - (load performance of past α days)/α)Xβ... (1) Here, (
Base load heat amount); preset data β; constant A predicted load curve from time t to D+1) is created based on this predicted load heat amount.

(2) Method of correcting the predicted load curve using outside air enthalpy The predicted load curve created from past performance data is corrected as follows according to the day's weather data (sunny, cloudy, rain, snow, etc.). That is, the weather data is converted to outside air enthalpy at time t, and the predicted load heat amount is multiplied by the correction factor shown in Table 1 by calculating the ratio with the reference enthalpy to create an operation plan curve.

(3) Method for controlling the number of heat source devices As shown in FIG. 4, the current heat source storage device 6 is
The required number of heat source devices 4-1 to 4-n is determined from the residual heat amount value 14 of . The method for determining the required number is as follows. In other words, for timing, (required number of units) = (base number of units according to the operation planning curve) + (residual heat value)
- (Operation plan curve value) (Standard value) ...... (2) Here, standard width: 15-1 to 15-n in Figure 4, one heat source device 4-1 to 4-n (Rated Capacity)

An example of the flow of controlling the number of heat source devices in steps (1) to (3) above is shown in FIG.

According to the embodiment of the present invention described above, in order to set the base load heat value, which should be the standard for formulating the operation plan curve 13, to a value as small as possible, or to effectively utilize late-night power, etc., it is possible to Heat storage device until just before entering! Possible control methods include radiating heat from 6, storing maximum heat during late-night power hours, and suppressing activation of the heat source device during the daytime as much as possible.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to control the number of operating heat source devices to minimize the power consumption of the heat storage devices while ensuring the necessary heat amount of the heat storage devices. This has the effect of not only ensuring comfort but also reducing power costs for heat source equipment.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the heat source device number control method of the present invention, FIG. 2 is a configuration diagram showing an embodiment of the heat source control device of FIG. 1, and FIG. 3 is a diagram showing a predicted load curve. Figure shown, 4th
The figure is a diagram for explaining a method for determining the number of heat source devices, and FIG. 5 is a diagram showing an example of a flow for controlling the number of heat source devices according to the present invention. DESCRIPTION OF SYMBOLS 1...Outside air thermometer, 2...Outside air hygrometer, 3...Heat source control device, 4-1~4-n...Heat source device, 5-1~
5-m... Heat storage device thermometer, 6... Heat storage device, 7... Pattern setter, 8... First pattern correction device. 9...Pattern storage device, 10...Second pattern correction device, 11...Heat source control determination unit, 12...Predicted load (1 other person) 1st hard! j; -/ s-l shoulder grass 2 mouth grass 3 hard (RT) grass 4 eyes

Claims (1)

[Claims] 1. In a heat source system consisting of a heat source device installed inside and outside a building, a heat storage device that stores the amount of heat generated by the heat source device, and a heat source control device that controls the heat source device, the heat source device, the amount of heat an operation measuring means for making an operation plan for the heat source apparatus by predicting the heat load based on past performance data of the heat storage amount of the storage device and weather data and correcting the predicted load curve in predetermined time units; and the operation measuring means. 1. A method for controlling the number of heat source devices, comprising: a control means for controlling the number of heat source devices by correcting the operation plan set up in accordance with the weather data of the day.