Public building central air-conditioning preopen time calculating method

Abstract

The invention provides a public building central air-conditioning preopen time calculating method, and relates to the technical field of energy conservation. The method aims to solve the technical problem of reducing the air conditioning operation cost. According to the method, firstly, the air conditioning temperature curve of an office building in the historical days of the previous year is obtained; secondly, a curved section A is intercepted from the air conditioning temperature curve in the historical days of the previous year; thirdly, the air conditioning energy loss rate per unit time is calculated according to the curved section A; fourthly, a curved section B is intercepted from the air conditioning temperature curve in the historical days of the previous year; fifthly, the air conditioning starting power average value and the air conditioning starting time length are calculated according to the curved section B; sixthly, an air conditioning cost target function is set, the minimum value of the air conditioning cost target function is calculated through an iteration method, and thus the air conditioning preopen time length is worked out. By means of the method, green energy can be fully utilized.

Description

technical field [0001] The invention relates to energy-saving technology, in particular to a method for calculating the pre-opening time of central air conditioners in public buildings. Background technique [0002] In order to make full use of green energy such as wind energy and solar energy, and use less non-renewable energy such as thermal power as much as possible, the power system divides the daily power supply into three periods according to the power consumption status, which are grid peak periods, grid normal periods, and grid valley periods. During the peak hours of the power grid when the power supply demand is relatively high (such as 9:00 to 17:00), the proportion of green energy is relatively low. , and the proportion of green energy reaches the highest during the grid valley period when the demand for power supply is the lowest. In order to encourage enterprises to use green energy, the electricity prices are different in different power supply periods. As on...

AI Technical Summary

Problems solved by technology

A long pre-opening time can make full use of the valley period of the power grid with a high proportion of green energy, but the loss of cooling and heating energy in public buildings is large, which is not conducive to energy saving; the pre-opening time is short, the loss of cooling and heating energy in public buildings is small, and the ambient temperature of the air conditioner may not reach According to the management regulations, the office comfort is reduced, and it is not conducive to the use of green energy during the valley period of the power grid, and it will also increase the operating cost of the air conditioner

However, how to determine the pre-opening time of the air conditioner, there is no effective method at present

Images