DEVICE FOR MEASURING AND CONTROLLING THE ENERGY CONSUMPTION OF HEATING INSTALLATIONS
This report describes research and development work for the design, construction and prototype testing of a heat meter which is based on temperature measurements in a heat bridge without moving parts. The development work yielded the following results: - The heat bridge is made of copper. - The design of the calorimeter is such that turbulent flow conditions exist at throughputs between 10 1/h and 500 1/h. - At 500 1/h the pressure drop is 50 mbar. - The temperature sensors used are Pt 1000 sensors on thin film basis. - Long time stability tests with the temperature sensors yielded deviations of +- 10**-3 K. - The differential temperature measurement is based on countercurrent flow conditions. - The evaluation algorithm is based on a family of calibration curves. - The results achieved with the existing laboratory model are evaluated with a desk computer. - Comparative measurements using approved commercial heat meters give an error of +- 2 %. The above results were obtained in laboratory investigations; they do not permit valid statements to be made about the desired long-term behaviour of the device. Therefore, it is currently being subjected to long- duration tests.
Bibliographic Reference: EUR 10304 EN (1985) MF, 41 P., BFR 150, BLOW-UP COPY BFR 205, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989124075300 / Last updated on: 1987-01-01
Available languages: en