ShareA new leak detection system for flammable refrigerants
A team of researchers has recently developed and tested a leak detection system for small equipment working with R290. Using ultrasound, it detects leaks effectively and at a lower cost than conventional detectors.
In an article published in volume 151 of the International Journal of Refrigeration, Daniel Colbourne and Asbjørn Vonsild present the fruit of their research: they developed and tested an economical and robust ultrasonic leak detection system for small equipment operating with flammable refrigerants.
Existing technologies use gas detection systems but are expensive and can be unreliable, the authors say.
The tests were carried out on a conventional split-type wall-mounted air conditioning indoor unit working with propane (R290).
Tests have shown a rapid and effective response, even for leaks with low flow rates (2 grams).
The ultrasonic detector tested was able to detect simulated leaks in the range 4 to 13 g/min.
Although not tested, it is likely that this ultrasonic leak detector would be effective for other flammable refrigerants.
Detector components are commercially available. These include low cost transducers with a long lifespan.
To find out more, consult the article in FRIDOC (free for standard individual members and collective members).
For more information about flammable refrigerants, please consult Daniel Colbourne’s informatory note on this topic.