August 2009

Columns

HP Reliability: Electric motors and mechanical efficiency

Reliability-focused readers know quite a bit about oil mist and many use plantwide oil mist systems for their process pumps and electric motor drivers. In fact, some major grassroots olefins plants us..

Bloch, Heinz P., Hydrocarbon Processing Staff

Reliability-focused readers know quite a bit about oil mist and many use plantwide oil mist systems for their process pumps and electric motor drivers. In fact, some major grassroots olefins plants used oil mist on motors with rolling-element bearings as small as 1 hp (0.75 kW) and as large as 1,250 hp (925 kW) as early as 1975. What's less known is that oil mist, together with the right viscosity synthetic lubricant, will save considerable energy.  In 1980, an important presentation described that a readily available synthetic lubricant, having a viscosity of 32 cSt at a temperature of 40°C (98°F), offered long-term contact surface protection for process pumps and their ele

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