Rupture disc

Rupture disc

Refrigeration and Air Conditioning

Published in Kenneth E. Heselton, Boiler Operator’s Handbook, 2020

Despite the fact that the chiller barrel operates in a vacuum it’s possible for the refrigerant in an idle chiller to reach the setting of the pressure relief device, which is typically a rupture disc which looks like a large version of the lid on one of your grandmother’s canning jars. It’s a convex sheet of metal that is bowed in toward the chiller barrel and, when the pressure reaches the design of the rupture disc it pops out (like the lid on that jar) but, in the process of doing that impinges on some sharp steel cutters that cut it so it peels back and dumps all the refrigerant. Temperatures above 120°F can create a saturation pressure that exceeds the typical rupture disc design of 15 psig. A full charge of refrigerant in a typical chiller costs more than $25,000 so, don’t let those chillers get too warm. I’ve always questioned some locations for them, especially over boiler rooms.

Thermodynamic properties and explosion energy analysis of carbon dioxide blasting systems

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Journal Information

Published in Mining Technology, 2019

Bo Ke, Keping Zhou, Chaoshui Xu, Gaofeng Ren, Tingting Jiang

As an example of showing the characteristics of the pressure profile, a detailed analysis is done for the curve for Test 1. As shown in Figure 11, the pressure in the blasting tube increases rapidly after the heater is activated. The rupture disc is destroyed when the pressure reaches the yield stress of the disc (point B in Figure 11). High-pressure fluid releases rapidly and the pressure in the tube decreases sharply. The pressure curve of the CO2 blasting process can be divided into three stages (Figure 11). Pressure rise stage (t1 + t2)

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Refrigeration and Air Conditioning

Thermodynamic properties and explosion energy analysis of carbon dioxide blasting systems