Ritchie O. Pragale

  • Citations Per Year
Learn More
Modern sodium chlorate or sodium hypochlorite-making processes (commonly known as “bleach”) take salt and water through an electrolytic process. The electrolytic process requires a significant amount of dc power. Bleach production plants, equipped with rectifiers, can generate potentially damaging harmonic currents if not mitigated or(More)
Electric submersible pumps (ESP) are used in a wide-range of applications from onshore to complex offshore, deep water, or subsea applications. Premature failures are undesired as they result in repair or replacement costs, but worse- downtime. This paper presents the challenges faced by the authors at an onshore oil field. The site experienced several ESP(More)
An engineering team at a large oil and gas company was tasked to address the alarming trend of increasing capital expenditures required to manage its two main challenges: the obsolescence and aging of electrical equipment in over 1,000 electrical substations. It was forecasted that nearly US$1 billion will be required over the next ten years to replace the(More)
The value proposition for the installation of power factor (PF) correction (PFC) to avoid costly utility penalties is easily understood. The attractive payback of such PFC opportunities often pushes the project ahead without engineering considerations. In the case of medium-voltage PFC, lack of upfront engineering can lead to unexpected consequences in the(More)
Arc-flash hazard assessment studies involving a very large oil and gas company's equipment rated 38 kV and below revealed locations with excessive arcflash incident energy. After conducting many additional studies of power distribution systems for various plants (e.g., refineries, gas plants, gas-oil separation plants, and natural gas liquid plants), we(More)
  • 1