The Design Of Metering And Monitoring System For District Heating System

The development of information science has radically optimized the traditional management method in district heating system, new data collection techniques are developed to take advantage of its unique characteristics. In order to improve the reliability of Calorimeter, to change out-dated data collection method, and to realize the automation of the district heating system, supported by "863 program", we developed the "Boiling" district heating metering and monitoring system.The principles, operations, circuits design and software development of this system are introduced. This project focuses on the discussion of the Intelligent Calorimeter, Portable Data Recorder and Database Management SystemEach Intelligent Calorimeter is installed in a heating station. It is applied to measure the quantity of heat consumed by users. It has high reliability, powerful functions, high compatibility, lower cost, and is more suitable to be used in China.Workers needn't go to the field to collect data. They can accomplish this by a Portable Data Recorder over a long distance. The Portable Data Recorder has a 240* 128 dot matrix LCD as its monitor, and NVRAM is up to 256K bytes.Data obtained by the Portable Data Recorder are sent to a computer via serial port. A Database Management System was developed to maintain the district-heating database. It has been applied in the field of data collection, and proves to be reliable, stable and efficient. It's expected that there will be wider application of this technology.