KR102210463B1 - Energy Trade System - Google Patents

Abstract

The present invention relates to an energy transaction system that provides various forms of energy transaction of a benefit compensation concept between a regional cooling business operator and an individual cooling user. The energy transaction system according to the present invention is a central district cooling facility that produces cooling heat for regional cooling. , A heat storage tank connected to the central district cooling facility through a one-way heat network to receive and store cooling heat from the central district cooling facility, and a storage tank connected to the heat storage tank through a two-way heat network to receive necessary cooling heat from the heat storage tank or surplus to the heat storage tank. It characterized in that it comprises a group of demand buildings that supply cooling and heat, and a transaction server for performing energy transactions by being connected to the central district cooling facility, the heat storage tank, and the demand building group through a communication network.

Description

Energy Trade System

The present invention relates to an energy transaction system, and more particularly, to an energy transaction system that provides various forms of energy transaction with a concept of benefit compensation between a local cooling business operator and a user.

The district cooling business is a business that has the characteristics of increasing operational efficiency and generating operational benefits when demands exceed a certain size through securing a number of demand sources through the application of economies of scale. In particular, demands over a certain scale due to enormous piping investment costs. Securing is essential.

However, due to the convenience and price competitiveness of competing individual cooling, a simple centralized district cooling system does not have adequate means to spontaneously induce the introduction of a regional cooling system.

Therefore, there is a need for securing a means to attract consumers by increasing the user's benefit by introducing regional cooling compared to the existing individual cooling.

On the other hand, the existing regional cooling model is a one-way cooling supply method to widely distributed customers after installing a large cooling source in the center, and must have a heat source facility capacity to supply stable cooling and heat energy to remote customers. Since all cooling and heat sources are concentrated in the center, there is a problem of increasing pumping cost due to friction loss in the pipe due to remote supply of cold water, etc.

Accordingly, there is a need to compensate for the disadvantages of the excessive centralized model through the establishment of a system capable of appropriately reducing demand for distributed type and having a distributed type of cooling heat source centering on the demands connected to the district cooling network.

On the other hand, district heating and cooling businesses with large-scale heat sources must implement new and renewable energy generation over a certain scale to meet the Renewable Portfolio Standards (RPS), but new and renewable energy generation technologies are enormous. Since the premise of securing the property, district heating and cooling businesses located in the city center, where most of the site costs are expensive, are struggling to prepare a suitable plan for implementing RPS, and thus the need to prepare a solution for this is emerging.

In addition, as can be seen in Patent Documents 1 and 2 below, a thermal compensation model that supplies excess heat energy from the user's heat source to the piping network and measures it with a calorimeter to receive heat as much as the corresponding amount of heat has been partially applied. In order to implement this, the physical system connection for the heat transaction between the user and the supplier network must be accompanied, and the complexity and control problems of the heat transaction facility in the process of implementing this must be solved. There is a problem.

KR 10-1752389 B1 JP 4523124 B2

The present invention has been conceived to solve the above problems, and an object of the present invention is to provide a new energy transaction system utilizing an idle site in a building that occurs due to the introduction of a district cooling system.

More specifically, A variety of distributed power generation and/or cooling facilities are installed on the site by securing an idle site for installation and operation of new and renewable energy generation facilities capable of responding to RPS that local cooling companies must implement from buildings to which local cooling is connected. A new energy transaction that provides users with reduced rates and discounts according to the use of cooling energy in buildings by using the pre-connected district cooling network as a reward for securing RECs and reducing the peak cooling load by operating them. It is an object of the present invention to provide a system.

The energy trading system according to the present invention for solving the above problems is connected to a central district cooling facility that produces cooling heat for district cooling, the central district cooling facility and a one-way heat network, so that cooling and heat from the central district cooling facility is provided. A heat storage tank that receives and stores it, a demand building group that is connected to the heat storage tank through a bidirectional heat network to receive necessary cooling heat from the heat storage tank or supplies excess cooling heat to the heat storage tank, and the central district cooling facility, heat storage tank and demand building group It characterized in that it comprises a transaction server that is connected to the communication network to perform energy transactions.

The demand building group is a building assembly capable of individually producing electricity and cooling heat with individual power generation and individual cooling facilities by a new renewable energy source for each building by utilizing the idle space of each building according to regional cooling.

A plurality of heat storage tanks may be provided for one central district cooling facility.

The heat storage tank and the demand building group are configured to correspond one-to-one.

The central district cooling facility is operated by an energy supply company, and the heat storage tank and the transaction server are operated by an energy demand management company.

The energy demand management service provider may be a separate service provider different from the energy supplier.

Meanwhile, the energy demand management business operator may be the same business as the energy supplier.

The energy transaction performed in the transaction server includes not only physical transactions for cooling and heating, but also transactions based on virtual benefits for energy demand management.

The energy transaction performed in the transaction server is divided into a building site rental transaction and an energy prosumer transaction according to the entity installing individual power generation and individual cooling facilities installed in the demand building group.

The building site rental transaction involves the installation and operation of individual power generation and individual cooling facilities by leasing an idle site secured by the supply of local cooling to the demand building group by an energy demand management company operating the heat storage tank from the owner of each building. It is characterized by compensation for part of the land rental and operating benefits to the building owner of each building with a local cooling fee.

The energy prosumer type transaction requires that the building owner of each building constituting the demand building group installs and operates individual power generation and individual cooling facilities at a direct cost, and directly or indirectly transacts the energy produced with the energy demand management company. It is characterized.

The energy prosumer-type transaction may include a transaction based on sales of new and renewable power, a transaction based on a peak-cut contribution to cooling load, and a transaction based on contribution to a distributed cooling heat source.

In the transaction based on the sale of new and renewable power, the building owner of each building constituting the demand building group sells the power produced by each new and renewable power generation facility through the power grid, and receives a new and renewable energy supply certificate. It is characterized in that, after transferring through the energy demand management company to the energy supply company requiring a certificate, compensation is received through a discount on regional cooling rates.

In the cooling load peak-cut contribution-based transaction, the building owner of each building constituting the demand building group uses individual renewable cooling facilities to self-manage the cooling load peak for the corresponding building, and the energy supply resulting from this In consideration of the operating benefits of the business operator, the energy demand management business operator, who receives cooling and heat from the energy supplier at a lower cost, compensates the building owner of each building with a discount on regional cooling rates.

In the case of the distributed cooling heat source contribution-based transaction, when the cooling energy generated by the individual new and renewable cooling facilities of each building is greater than the cooling load of each building, the building owner of each building constituting the demand building group recalls the corresponding surplus cooling heat. It is characterized in that, after being supplied to the heat storage tank, a later settlement is received from the energy demand management company for the supplied cooling heat.

The value of the supplied cooling and heat may be settled equal to the value of the supplied cooling and heating.

Meanwhile, the value of the supplied cooling and heat may be differentially calculated in real time according to the supply-demand principle.

The real-time differential settlement may be performed through an auction system.

The energy transaction system according to the present invention enables a business operator to compensate for various benefits that each building contributes to the district cooling operation, and makes it easier to implement a wider range of transactions by preventing the user's contribution from being limited to the physical contribution. Let's do it.

In addition, the energy transaction system according to the present invention effectively utilizes the idle site of the building, which inevitably occurs due to the connection of the district cooling, unlike the existing district cooling that has a one-way heat supply type, so that benefits can occur between users and suppliers. In addition, it is possible to promote demand expansion by securing competitiveness by connecting regional cooling.

Further, the energy trading system according to the present invention is a method of expanding the distribution of distributed renewable energy generation sources using the idle space of the building and reducing the peak load for each building due to the supply of local cooling. Through dissemination, it is possible to achieve higher efficiency and CO2 reduction compared to individual energy supply means, thereby contributing to securing more eco-friendly energy supply means.

1 is a conceptual diagram of an energy trading system according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, detailed descriptions of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a conceptual diagram of an energy trading system according to the present invention.

The energy transaction system according to the present invention is connected to the central district cooling facility (1) that produces cooling heat for district cooling, the central district cooling facility (1) and one-way heat network (10), and the central district cooling facility (1) ) To receive and store cooling heat from the heat storage tank (2), the heat storage tank (2) and the two-way heat network (20) are connected to receive the required cooling heat from the heat storage tank (2) or excess cooling heat to the heat storage tank (2) It includes a demand building group (3) that supplies

In the present invention, the heat network refers to a physical pipe network through which a fluid that transfers cooling heat flows.

The central district cooling facility 1 is a central heat source facility operated by an energy supplier and corresponds to an existing central district cooling facility, and thus a detailed description thereof will be omitted.

The heat storage tank 2 is a heat storage facility operated by an energy demand management business operator, and controls the inconsistency between the cooling heat demand of the demand building group 3 and the cooling heat supply of the central district cooling facility 1 Functions.

That is, the heat storage tank 2 allows the storage of excess cooling heat in the demand building group 3 without discarding it, and the supply of cooling heat from the central district cooling facility 1 is the demand building group 3 Even if it does not meet the demand for cooling and heat generation, the stored cooling heat can be supplied to the demand building group 3, thereby enabling smooth demand management between the central district cooling facility 1 and the demand building group 3.

In the present invention, the energy demand management service provider is assumed to be a separate service provider different from the energy supply service provider, but is not necessarily limited thereto, and the energy demand management service provider may also serve as the energy supplier.

The demand building group 3 is an aggregate of buildings 31 that consume cooling heat according to the cooling load of each building, and in the present invention, in addition to this, an idle space of each building 31 according to regional cooling (roof , Machine room, etc.), each building 31 is equipped with individual power generation and/or cooling facilities 32 and 33 by a renewable energy source, and is a building assembly capable of individually producing electricity and/or cooling heat.

That is, in the present invention, the demand building group 3 may be regarded as a building aggregate as a prosumer that consumes and produces cooling heat, not just consumers who simply consume cooling heat.

The cooling heat produced by the demand building group 3 is supplied to the heat storage tank 2 and stored or used by itself at a cooling load peak, and the generated electricity can be supplied to the power grid 4.

On the other hand, in the present invention, the heat storage tank 2 may be configured as a distributed heat storage facility provided with a plurality of one central district cooling facility 1, but the heat storage tank 2 and the demand building group 3 Is always configured to correspond one-to-one.

Meanwhile, the energy transaction system according to the present invention further includes a transaction server (not shown) connected to the central district cooling facility 1, the heat storage tank 2, and the demand building group 3 through a communication network.

The transaction server is operated by an energy demand management company that operates the heat storage tank 2, and according to the energy transaction method described below, the central district cooling facility 1, the heat storage tank 2, and the demand building group 3 It is a server that performs energy transactions between.

In the present invention, the energy transaction performed in the transaction server includes not only physical transactions for cooling and heat, but also transactions based on non-physical or virtual benefits according to energy demand management, and is installed in the demand building group (3). Depending on the entity installing individual power generation and/or cooling facilities (32, 33), it is divided into a building site rental transaction and an energy prosumer transaction.

First, in the building site rental transaction, an energy demand management company operating the heat storage tank 2 leases an idle site secured by the supply of regional cooling to the demand building group 3 from the owner of each building 31. It is a transaction that installs and operates individual power generation and/or cooling facilities 32 and 33, and compensates the landlords of each building 31 for some of the benefits of land rental and operation with local cooling fees.

Here, the operational benefit is when the demand building group (3) partially handles the peak cooling load that occurs in summer, etc., from the perspective of the energy supplier, reducing the investment cost due to the reduction in the facility capacity of the central district cooling facility (1). On the basis of this, the energy demand management business means the benefits generated by receiving cooling and heating from the energy supplier at a lower cost.

As a result, the fee charged to the user according to the building site rental transaction can be expressed as follows.

[Equation 1]

User-imposed fee = (1-α) × actual usage fee

Here, α is the discount rate for land rental utilization, which is greater than 0 and less than 1.

Next, in the energy prosumer transaction, the owner of each building 31 constituting the demand building group 3 installs, operates, and produces individual power generation and/or cooling facilities 32 and 33 at a direct cost. As a form of directly or indirectly transacting with the energy demand management business entity, according to an embodiment of the present invention, transactions based on sales of new and renewable power, transactions based on contributions to peak-cut of cooling load, and transactions based on contribution to distributed cooling heat sources And the like.

In the new and renewable power sales-based transaction, the building owner of each building 31 constituting the demand building group 3 uses the power generated by the individual renewable power generation facilities (eg, solar, wind, etc.) 32 By selling through the grid (4), receiving Renewable Energy Certificates (REC), and transferring it to an energy supply company requiring a new and renewable energy supply certificate through an energy demand management service provider, etc. It is a reward-based transaction.

The cooling load peak-cut contribution-based transaction is applied by the building owner of each building 31 constituting the demand building group 3 using an individual renewable cooling facility (eg, Solar Cooling) 33 Each building (31) is an energy demand management business operator who can handle the peak cooling load on the building 31 and receive cooling and heat from the energy supplier at a lower cost in consideration of the operating benefits of the energy supplier. It is a transaction that compensates the building owner of) with a discount on district cooling rates.

In the case of the distributed cooling heat source contribution-based transaction, when the cooling energy generated by the individual new and renewable cooling facilities 33 of each building 31 is greater than the cooling load of each building, each building constituting the demand building group 3 The building owner of (31) is a transaction in the form of receiving a later settlement from the energy demand management company for the supplied cooling heat after supplying the excess cooling heat to the heat storage tank 2.

In the distributed cooling heat source contribution-based transaction, the value of the supplied cooling heat can be settled at the same value as the supplied cooling heat, but it is more preferable to settle the value differentially according to the supply-demand principle, and at this time, the real-time price calculation The introduction of a bidding system may be considered.

In summary, the fee charged to the user according to the energy prosumer type transaction can be expressed as follows.

[Equation 2]

User-imposed fee = (1-(β + γ + δ +…)) × actual usage fee

Here, β, γ, and δ are the REC contribution compensation discount rate, the peak reduction contribution compensation discount rate, and the surplus cooling energy sales compensation discount rate, respectively, and are all values greater than 0 and less than 1.

Each of the compensation discount rates (β, γ, δ) may be determined by agreement between the user and the business operator, and may be applied by calculating an average settlement value according to annual operating performance.

If the sum of each compensation discount rate is greater than 1 (1 <(β + γ + δ +… )), the portion greater than 1 can be compensated in cash or carried over. Transaction settlement can be applied by calculating various periods such as monthly or yearly.

The energy transaction system according to the present invention has the above configuration, and is not limited to the physical transaction for heat itself, but can implement a wide range of transactions including conceptual and institutional benefits. It is possible to increase the value, and from the perspective of users, various rewards can be received according to the contribution level of each building.

In the above, the energy trading system according to the present invention has been described in detail with reference to the accompanying drawings, but the embodiments disclosed in the present specification and the accompanying drawings are only used for the purpose of easily describing the technical idea of the present invention. It is not used to limit the scope of the invention described in the claims, and therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

1: Central district cooling facility
2: heat storage tank
3: demand building group
4: power grid
10: one-way heat network
20: two-way thermal network
31: building
32: individual power plant
33: individual cooling equipment

Claims (18)

A central district cooling facility that produces cooling heat for district cooling;
A heat storage tank connected to the central district cooling facility through a one-way heat network to receive and store cooling heat from the central district cooling facility;
A demand building group connected to the heat storage tank through a bidirectional heat network to receive necessary cooling heat from the heat storage tank or to supply excess cooling heat to the heat storage tank; And
A transaction server connected to the central district cooling facility, heat storage tank, and demand building group through a communication network to perform energy transactions;
Including,
The demand building group is a building assembly capable of individually producing electricity and cooling heat with individual power generation and individual cooling facilities by a new renewable energy source for each building by utilizing the idle space of each building according to regional cooling,
The energy transaction performed by the transaction server is divided into a building site rental transaction and an energy prosumer transaction according to a subject installing individual power generation and individual cooling facilities installed in the demand building group. delete ◈ Claim 3 was abandoned upon payment of the set registration fee. The method according to claim 1,
The energy trading system, characterized in that the plurality of heat storage tanks are provided for one central district cooling facility. ◈ Claim 4 was abandoned upon payment of the set registration fee. The method according to claim 1,
The energy trading system, characterized in that the heat storage tank and the demand building group are configured to correspond one-to-one. The method according to claim 1,
The central district cooling facility is operated by an energy supplier, and the heat storage tank and the transaction server are operated by an energy demand management company. The method of claim 5,
The energy demand management business operator is an energy transaction system, characterized in that the separate business and the energy supply business. The method of claim 5,
The energy demand management business operator is an energy transaction system, characterized in that the same business as the energy supply business. delete delete The method of claim 5,
The building site rental transaction involves the installation and operation of individual power generation and individual cooling facilities by leasing an idle site secured by the supply of local cooling to the demand building group by an energy demand management company operating the heat storage tank from the owner of each building. An energy transaction system, characterized in that the landlord of each building compensates for part of the land rental and operation benefits with a district cooling fee. The method of claim 10,
The energy prosumer type transaction requires that the building owner of each building constituting the demand building group installs and operates individual power generation and individual cooling facilities at a direct cost, and directly or indirectly transacts the energy produced with the energy demand management company. Energy trading system characterized by. The method of claim 11,
The energy prosumer type transaction includes a transaction based on sales of new and renewable power, a transaction based on a peak-cut contribution to cooling load, and a transaction based on a contribution from a distributed cooling heat source. ◈ Claim 13 was abandoned upon payment of the set registration fee. The method of claim 12,
In the transaction based on the sale of new and renewable power, the building owner of each building constituting the demand building group sells the power produced by each new and renewable power generation facility through the power grid, and receives a new and renewable energy supply certificate. An energy transaction system, characterized in that, after transferring through the energy demand management company to the energy supply company requiring a certificate, compensation is received through a discount on regional cooling rates. ◈ Claim 14 was abandoned upon payment of the set registration fee. The method of claim 12,
In the cooling load peak-cut contribution-based transaction, the building owner of each building constituting the demand building group uses individual renewable cooling facilities to self-manage the cooling load peak for the corresponding building, and the energy supply resulting from this An energy transaction system, characterized in that the energy demand management service provider, who receives cooling and heat from the energy supplier in consideration of operating convenience, compensates the building owner of each building with a discount on regional cooling rates. ◈ Claim 15 was abandoned upon payment of the set registration fee. The method of claim 12,
In the case of the distributed cooling heat source contribution-based transaction, when the cooling energy generated by each new renewable cooling facility of each building constituting the demand building group is greater than the cooling load of each building, the building owner of each building constituting the demand building group An energy transaction system, characterized in that, after supplying the excess cooling heat to the heat storage tank, a later settlement is received from the energy demand management company for the supplied cooling heat. ◈ Claim 16 was abandoned upon payment of the set registration fee. The method of claim 15,
The energy transaction system, characterized in that the value of the supplied cooling and heating is calculated equal to the value of the supplied cooling and heating. ◈ Claim 17 was abandoned upon payment of the set registration fee. The method of claim 15,
The energy transaction system, characterized in that the value of the supplied cooling and heat is differentially calculated in real time according to a supply-demand principle. ◈ Claim 18 was abandoned upon payment of the set registration fee. The method of claim 17,
The energy transaction system, characterized in that the real-time differential settlement is performed through an auction system.

Images