Flow temperature difference proportional cold energy distribution system and method

Abstract

The invention provides a flow temperature difference proportional cold energy distribution system and method and relates to a flow temperature difference cold energy distribution system and method, and the system and method provided by the invention can be used for solving the defects of a currently applied cold energy metering method and are accurate and reliable in a metered result. The system is characterized in that a main water return pipe at the tail end of a fan coil of each user is provided with a balanced valve with a flow measurement function and a return water temperature sensor; amain water supply pipe at the tail end of each fan coil is provided with a supply water temperature sensor; the supply water temperature sensor and the return water temperature sensor transmit signals to a remote transmission module through unit temperature collectors; and a cold energy meter is arranged on a main pipe and used for transmitting the signals to the remote transmission module. The method comprises the following steps: carrying out initial adjustment on a water system in a building; determining the flow distribution coefficient of the main water supply pipe at the tail end of thefan coil of each user; and calculating the cold energy distributed to each user. The cold energy metering system is low in failure rate and long in service time and can be used for achieving a cold energy fee distribution result which can be easily understood and accepted by people. The system provided by the invention is applied to buildings with fan coil air-conditioning systems.

Description

technical field The invention relates to a flow temperature difference cooling capacity distribution system and method. Background technique my country's cooling capacity measurement started late, most of the existing buildings did not install cooling capacity measurement facilities, and a small number of new buildings' centralized air-conditioning systems were equipped with cooling capacity measurement instruments. At present, the metering and charging methods used in China include: area method, water-side cooling meter method (integral type, split type), electricity method, and time method; domestic scholars' theoretical research includes: wind-side cooling method, wind-side enthalpy difference method , Harmonic response method. 1. Area method Since the requirement of metering was not considered in domestic HVAC design and property management before, no metering device was designed for the air-conditioning system. Therefore, the cooling department charges the cooling ...

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Problems solved by technology

The purpose of the present invention is to provide a flow-temperature-difference proportional cooling capacity distribution system and method, which are used to solve the cooling capacity allocation problem of apartments and office buildings using fan-coil air-conditioning systems; Disadvantages, solve the problem of high initial investment and heavy maintenance workload of the water-side cooling meter method; solve the error caused by replacing the actual working condition with the rated working condition in the time distribution table method; avoid the relative humidity and air volume in the wind-side metering process Difficult to measure and difficult to calibrate

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