Methodology for calculating standards for process losses of heat energy and heat carrier, and consumption of electricity during transmission

Abstract

A logical and sequential model of calculation of standards of process losses of heat energy and heat carrier, as well as electricity costs during transmission of heat energy in heating networks has been developed and built using MS Excel. The model constitutes a group of files interconnected by links, which allows perceiving the whole group of files as a single program. All the user needs to do is enter the source parameters of the heat network sections, such as length, diameter, year of installation, temperature curve, network operation time, pumping equipment characteristics, network operation temperature schedule, ambient temperature norms in accordance with the region of calculation, and the output will be a ready detailed calculation of all the normal rates. In the process of successive calculation, such normative values as heat energy losses, heat carrier costs, hourly heat energy losses under average annual network operating conditions, annual heat energy losses are determined. Besides, hourly and annual losses of heat carrier with leaks are determined. Power consumption is calculated on the basis of factory and operating parameters of pumping equipment operation. The results of standard calculations are summarized in a consolidated table, where both monthly and annual figures are shown. The procedure makes it possible to considerably decrease the time spent on calculations of normal rates, to make a forecast for heat energy balance, to analyze the dynamics of actual and estimated values. The methodology has been successfully proven, with multiple approvals of standards of process losses of heat energy, heat carrier, and electricity consumption during transmission by the Ministry of Energy of the Russian Federation.