Calculating method for determining cooling and heating load of building in hot-summer and cold-winter zone by utilizing pivot element decoupling method

Abstract

The invention discloses a calculating method for determining cooling and heating load of a building in a hot-summer and cold-winter zone by utilizing a pivot element decoupling method. Factors influencing the cooling and heating load of the building are divided into two main types: the self attribute parameter and the operation attribute parameter of the building. The calculation is conducted by the following steps: according to the indoor comprehensive heat dissipation power, calculating the benchmark of the cooling and heating load; according to the work and rest time in the building, calculating the radiation coefficient and the temperature difference coefficient; according to the orientation, the window-wall ratio, the external wall heat resistance and the window heat resistance of the building, calculating the correction factors of the orientation, the window-wall ratio, the external wall heat resistance and the window heat resistance in sequence; according to the coupling influence of the self attribute parameter and the operation attribute parameter, calculating the coupling influence factor; finally calculating the average cold and hot power of unit area of the building in summer (winter) and the cooling (heating) capacity in various time periods of a typical day. The calculating method can meet the precision requirements of engineering application, quickly and economically calculate the cooling and heating load of the typical building in the hot-summer and cold-winter zone, guide the distributed energy system design, and provide reference for system operation and optimization.

Description

technical field [0001] The invention belongs to the technical field of building energy consumption calculation in regional distributed energy planning, and specifically relates to a method for calculating building loads in hot summer and cold winter regions by using principal element decoupling. Background technique [0002] With the improvement of our country's economy and the continuous development of society, the concept of resource-saving and environment-friendly has begun to take root in the hearts of the people. Traditional industrial parks are transforming into science and technology ecological parks, and commercial centers and residential areas are transforming into comfortable and livable ones. Their power, cooling and heating load densities are relatively large and users are relatively concentrated. The traditional way of dividing production has low energy utilization efficiency and poor economic performance, which no longer meets the needs of the development of th...

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Problems solved by technology

[0005] These two methods have high accuracy, but there are three major problems in the practical application of distributed energy systems: (1) The two methods need to provide complete construction drawings and parameters of the building. In the early stage of regional energy planning, many At that time, there was only a general understanding of the building, and it was impossible to obtain complete parameters; (2) In the early stage of distributed energy system planning, buildings with different functions need to be configured to make the difference between the peak and valley of the cooling and heating load in the area as small as possible, and the designer needs to know the building load. Dynamic characteristics and the basis for its functional classification; (3) With the development of the region, parameters such as personnel density, simultaneous rate and work and rest time may change, and are quite different from the design working conditions.

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