JPH06341302A - Area heat supplying plant - Google Patents

Abstract

PURPOSE:To operate a plant to supply heat with a high load and high efficiency from other heat supplying plants when the load level is low by providing the network of a plurality of heat supplying plants in the area heat supplying plant. CONSTITUTION:A heat supplying plant (B) 3 supplies heat to the area (b) 4 of demanders, and a heat supplying plant (A) 1 also supplies heat to the area (a) 2 of demanders. When the heat load level of the areas (a) 2, (b) 4 of demanders becomes low, the heat supplying plant (B) 3 stops the operation of its heat source machine, and receives heat from the heat supplying plant (A) 1 through a heat exchanger 5 to supply heat to the area (b) 4 of demanders. Thus, the heat supplying plant (A) 1 can be operated with high load and high efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a district heat supply plant in which a plurality of heat supply plants and loads in demand areas are networked in a district heat supply plant.

[0002]

2. Description of the Related Art A conventional heat supply plant is installed in each heat demand area as shown in FIG. 2, and it is impossible to operate the plant with high efficiency when the load is low. Even when the plant was networked, the heat medium piping was directly connected. That is, heat is supplied from the heat supply plant (A) 1 to the customer (a) 2, and the heat supply plant (B) 3
Supplies heat to the customer (b) 4, and has installed a heat supply plant for each area.

[0003]

As described above, since the heat supply plant is provided for each heat consumer area, in the case of a low consumer load, the heat supply plant individually has a low load. Although they are operated, if the plants are networked together, one of the plants can be stopped and the other plant can be operated at a higher load to operate the heat source machine with high efficiency. Further, if a heat exchanger is interposed in the receiving system of the supplied plant, a network can be formed even if the two supply temperature conditions are different, and a dedicated pump or the like attached to the receiving equipment is not required.

The present invention has been made for the purpose of networking such a heat supply plant to achieve high efficiency.

[0005]

In order to solve the above-mentioned problems, the present invention switches a heat source unit of a corresponding heat supply plant when a plurality of heat supply plants are networked and the levels of a plurality of loads are low to some extent. The heat supply plant receives heat from another heat supply plant, and the heat supply plant is operated under high load to improve efficiency. That is, according to the present invention, in a district heat supply plant in which a plurality of heat supply plants that supply a heat medium supplied from a heat source device to the load side are installed for each heat demand area, one of the heat supply plants is connected to the load side. A heat exchanger for exchanging heat between the heat medium circulated to the heat exchanger and the heat medium supplied from another heat supply plant, and the heat medium circulated to the load side to the heat exchanger and the heat source device. The present invention provides a district heat supply plant characterized in that a plurality of heat supply plants are networked by providing switching means for switching to any one of the heat medium flows.

[0006]

Since the present invention is the means as described above, when the heat load on the customer is large to some extent, heat is supplied to each customer from each heat supply plant. When the heat load on the customer becomes a low level, the heat source machine of the heat supply plant is stopped, and heat is distributed to the heat supply plant from the heat medium supplied from another heat supply plant from the heat exchanger. , Supply heat to its customers.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on the embodiments shown in the drawings. 1 is a block diagram of a network of a district heat supply plant according to an embodiment of the present invention, and FIG. 3 is a system diagram of main equipment of the heat supply plant in FIG. In FIG. 1, 2 and 4 are supplied with heat from the heat supply plants (A) 1 and (B) 3 in the customer areas a and b, respectively, and the heat supply plant (B) 3 receives heat from the heat reception plants shown in FIG. Heat exchanger 5
Is connected to the heat supply plant (A) 1 via the heat exchanger and the heat output generated by the heat supply plant (A) 1 is distributed to the heat supply plant (B) 3 via the heat exchanger 5. FIG. 3 is a system diagram showing the configuration of the main equipment that connects the heat source device 6 and the customer area 4 via the heat receiving heat exchanger 5, and 6 is a heat source device, which is a regional water pump 8, a circulation pump 7, and a bypass pipe 9. , Valve 10 (V
-1), 11 (V-2) and 12 (V-3) are configured as shown.

Next, the operation of the plant having the above structure will be described. When the heat supply plant B does not receive heat distribution from the plant A, that is, when the loads La and Lb in the customer areas a and b are at a certain level or higher, the valve 10 (V-
After closing 1), the heat source unit 6, the circulation pump 7, and the local water supply pump 8 are operated to operate the normal plant.

Next, when heat is distributed from the plant A, that is, when the loads La and Lb are at a level below a certain level, the valve 11 (V-2) and the valve 12 (V-
3) is closed, the valve 10 (V-1) is opened, the heat source device 6 and the circulation pump 7 are stopped, only the regional water supply pump 8 is operated, and the heat supply plant A is operated via the heat exchanger 5. The heat received is supplied to the consumer area (b) 4.

In the above embodiment, the heat supply plant provided with the heat exchanger 5 is (B) 3 and the heat supply from (A) 1 is taken as an example, but the heat supply plant has a plurality of networks. The number of plants where the exchangers are provided is not limited to one, but may be plural.

In the embodiment described above, when the loads La and Lb of the customers a and b are at a level below a certain level, the heat supply plant (A) 1 is used if the loads La and Lb are not networked as shown in FIG. , Heat supply plant (B) 2
Respectively operate the outputs of La and Lb, but if they are networked, the heat source unit 6 of the plant (B) 3 is stopped, and heat is distributed from the plant (A) 1, the load of the plant (A) 1 Is a high load operation with La + Lb, which enables highly efficient operation and improves the energy saving effect.

Further, when the heat supply plant (B) 3 is not receiving heat distribution, the valve 11 (V-2) is narrowed down to some extent to obtain a pressure loss amount of the heat exchanger 5 when heat is distributed. In other words, the head of the regional water pump 8 can always be fixed, and this pump can be effectively used without affecting it.

[0013]

As described above in detail, in the present invention, when the load on the customer is at a level below a certain level, the heat source unit of the heat supply plant is stopped and the heat is supplied through the heat exchanger. Since the heat is distributed from the other heat supply plant, the load of the heat supply plant becomes high load operation, high efficiency operation becomes possible, and the energy saving effect is enhanced. Also, if the plant is not receiving heat distribution, the valve should be narrowed down to some extent, and if the pressure loss of the heat exchanger during heat distribution is earned, the head of the water supply pump to the load of the local customers will always be It can be kept constant and can be operated without affecting this pump.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a network of a district heat supply plant according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a configuration of a conventional heat supply system.

FIG. 3 is a system diagram of main equipment of the heat supply plant in the embodiment shown in FIG.

[Explanation of symbols]

 1 Heat Supply Plant (A) 2 Customer Area (a) 3 Heat Supply Plant (B) 4 Customer Area (b) 5 Heat Exchanger 6 Heat Source Machine 7 Circulation Pump 8 Regional Water Pump 9 Bypass Pipe 10 Valve 11 Valve 12 valve

Claims (1)

[Claims] 1. A district heat supply plant comprising a plurality of heat supply plants for supplying heat medium supplied from a heat source device to a load side in each heat demand area, wherein one of the heat supply plants is connected to the load side. A heat medium to be circulated and a heat exchanger to exchange heat with a heat medium supplied from another heat supply plant are provided, and the flow of the medium circulated to the load side is the same between the heat exchanger and the heat source device. A district heat supply plant comprising a plurality of heat supply plants networked by providing a switching means for switching to one of a flow of a heat medium.