Heat source system managing device, heat source system managing method, and program

Patent metadata

Field	Value
Publication number	US-10808947-B2
Application number	US-201515533675-A
Country	US
Kind code	B2
Filing date	Nov 6, 2015
Priority date	Dec 18, 2014
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A heat source system managing device includes: a predicted heat demand upper limit calculating unit configured to calculate a predicted heat demand upper limit by adding a prediction error to a predicted heat demand value for a heat source system; an operation plan preparing unit configured to prepare an operation plan of the heat source system to supply heat of the predicted heat demand upper limit to a consuming facility; a surplus stored heat quantity calculating unit configured to repeatedly perform a process of calculating a surplus stored heat quantity by subtracting a heat quantity consumed by the consuming facility from the predicted heat demand upper limit; and an operation plan changing unit configured to sequentially change the operation plan by decreasing a future operation rate of a refrigerator to cancel the surplus stored heat quantity.

First claim

The invention claimed is:

1. A managing device for improving energy efficiency of a heat source system, comprising:
a plurality of sensors;
one or more heat source devices, and a heat storage tank storing cold heat or hot heat generated by the one or more heat source devices; and
a processor that is communicatively coupled to the plurality of sensors, the one or more heat source devices, and the heat storage tank, wherein the processor:
calculates a predicted heat demand upper limit by adding a predetermined prediction error to a predicted heat demand value for the heat source system, wherein the predicted heat demand upper limit is greater than the predicted heat demand value for the heat source system;
prepares an operation plan of the heat source system to supply heat of the predicted heat demand upper limit to a load of the heat source system;
repeatedly performs, during a plurality of time periods of a day, a process of calculating a surplus stored heat quantity by subtracting a heat quantity consumed by the load in a respective time period from the predicted heat demand upper limit in a heat radiating operation, wherein the heat radiating operation radiates heat from the heat storage tank to the load in accordance with the operation plan; and
on a condition that the surplus stored heat quantity calculated for the respective time period is substantially equivalent to the cold heat consumed in operation, sequentially changes the operation plan by decreasing a future operation rate of the one or more heat source devices for a future time period to cancel the surplus stored heat quantity, thereby improving energy efficiency.

2. The managing device according to claim 1 , wherein the heat source system includes two or more heat source devices, and
the processor further calculates a generation cost per unit heat quantity in each time period for each heat source device, and prepares the operation plan to stop the heat source system having a larger generation cost.

3. The managing device according to claim 1 , wherein the processor sequentially changes the operation plan to stop a particular heat source device having a larger generation cost per unit heat quantity in each time period when selecting the heat source device to be stopped to cancel the surplus stored heat quantity among two or more heat source devices.

4. The managing device according to claim 1 , wherein the processor calculates a radiation loss in the heat storage tank based on an outdoor air temperature and a temperature distribution of a heat medium stored in the heat storage tank, and
wherein the processor prepares the operation plan such that heat obtained by adding the radiation loss to the predicted heat demand upper limit is generated by the one or more heat source devices.

5. A method for improving energy efficiency of a heat source system, implemented in a processor communicatively coupled with a plurality of sensors, the method comprising:
calculating, by the processor, a predicted heat demand upper limit by adding a predetermined prediction error to a predicted heat demand value for the heat source system, wherein the predicted heat demand upper limit is greater than the predicted heat demand for the heat source system;
preparing, by the processor, an operation plan of the heat source system to supply heat of the predicted heat demand upper limit to a load of the heat source system, wherein the heat source system includes one or more heat source devices and a heat storage tank storing cold heat or hot heat generated by the one or more heat source devices;
repeatedly performing, by the processor, a process of calculating a surplus stored heat quantity for a plurality of time periods of a day, wherein the surplus stored heat quantity is calculated by subtracting a heat quantity consumed by the load from the predicted heat demand upper limit in a heat radiating operation, wherein the heat raiding operation radiates heat from the heat storage tank to the load in accordance with the operation plan; and
on a condition that the surplus stored heat quantity calculated for the respective time is substantially equivalent to the cold heat consumed in operation, sequentially changing, by the processor, the operation plan by decreasing a future operation rate of the one or more heat source devices for a future time period to cancel the surplus stored heat quantity, thereby improving energy efficiency.

Assignees

• Hitachi Ltd

Inventors

• Kawamura Tsutomu
• Kawabata Kaoru
• Nakamura Ryousuke
• Kikuchi Hiroshige
• Ikeda Susumu

Classifications

• F24F2140/00

  Control inputs relating to system states · CPC title

• F24F11/64

  using pre-stored data · CPC title

• F24F11/46

  Improving electric energy efficiency or saving · CPC title

• F24F11/30

  for purposes related to the operation of the system, e.g. for safety or monitoring · CPC title

• Y02E60/14

  Thermal energy storage · CPC title