Household-based heat metering method and system based on mathematical model of central heating system

Abstract

The invention discloses a household-based heat metering method and system based on a mathematical model of a central heating system. The household-based heat metering system comprises a data acquisition and control device, a heat metering device and a central heating system managing center, wherein the data acquisition and control device finishes data acquisition of heating branch circuits and transmits the data to the heat metering device; the heat metering device receives the data transmitted by the data acquisition and control device and analyzes, processes and calculates the data by heat metering software so as to obtain heat used by a user; and the heat metering software executes steps such as calculating a user water supply end pressure, user pressure loss, user flow rate, user resistance character number, user water supply end temperature, the heat used by a user and the like. According to the method disclosed by the invention, the household-based heat metering can be realized by the user through just installing a small amount of measurement devices without a heat meter and a heat cost allocator, thus the initial cost of the system is lowered, the troubles caused by maintaining and changing a large amount of devices such as heat meters, flow meters and the like are also avoided, and the maintenance cost of the system is lowered.

Description

technical field [0001] The invention belongs to the technical field of central heating systems, and in particular relates to a household heat metering method and system based on a mathematical model of a central heating system. Background technique [0002] The concept of "heat commercialization" is increasingly accepted by people, and the heating industry in my country will also develop in this direction in the future. To achieve this goal, there must be mature, fair and low-cost heat metering technology. With this key technology, it is possible to realize user heat metering in a true sense, and to make it widely used. This not only saves energy, but also improves thermal comfort. Therefore, how to objectively measure and correct the user's calorie consumption is a current research hotspot and difficulty. [0003] In response to the above problems, the state has also formulated corresponding standards and norms. For example, Article 3.9.1 of the national standard "C...

AI Technical Summary

Problems solved by technology

The disadvantage is that the heating pipeline structure must be a closed loop, and most of the existing heating residential buildings do not meet this condition

Its disadvantages are: the measurement principle and heat supply calculation formula are complicated, and the determination of the heat transfer coefficient of the radiator surface is inaccurate and unstable. It is affected by many factors and has a great influence, so it is difficult to obtain a stable and accurate User heat supply

Its disadvantages are: lack of fairness and rationality, cannot meet thermal comfort, and is not conducive to energy saving

Its disadvantage is that it does not take the actual heat consumption as the measurement basis, but only takes the indoor temperature as the measurement basis, which is easy to cheat and fairness is difficult to guarantee

Its disadvantages are: since the heat dissipation and water temperature are not linearly related, the principle of fairness cannot be satisfied

Its disadvantages are: more control and monitoring equipment are needed, so the initial investment is higher, and the water quality requirements are higher, otherwise it is easy to cause poor accuracy of valve control and flowmeter

The disadvantage is that the water supply temperature and return water temperature of each user are not equal, so it is difficult to ensure fairness

Heat meters are expensive. Installing a heat meter per household will increase the initial investment of the system, difficult maintenance, and high renovation costs, making it difficult to be popularized and used. Inaccurate and unstable; the hot water flow temperature method requires each user to install a flow meter, which requires high water quality and difficult maintenance

The remaining four methods lack fairness and cannot realize energy-saving control, so they are rarely used in actual central heating systems

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