Development of a loss pareto for a rotating spool compressor using high-speed pressure measurements and friction analysis. (25th April 2016)

• Record Type: Journal Article
• Authors: Bradshaw, Craig R.; Kemp, Greg; Orosz, Joe; Groll, Eckhard A.
• Is Part Of: Applied thermal engineering. Volume 99(2016:Apr.)
• Page Start: 392
• Page End: 401
• Publication Date: 2016-04-25
• Subjects: Spool compressor -- Loss analysis -- Indicator diagram -- Friction analysis -- Novel compressor -- High-speed pressure measurement; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2015.12.024
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Indicated losses of the 5 th generation spool compressor measured with high-speed pressure measurements is presented. Frictional losses are calculated using sub-models associated with each component/interface for the 5 th generation spool compressor. Loss Pareto for 5th generation spool compressor generated from friction analysis and high-speed pressure measurements is presented. Improved 6th generation spool compressor is developed based on analyses with isentropic efficiency exceeding 80%. Abstract: A rotating spool compressor is a new compressor technology that was recently introduced by Kemp et al. in 2008. To accelerate the development of the technology, a breakdown of the key losses within the 5th generation device is presented. The losses include indicated losses associated with leakage and over/under compression due to valves and porting. These losses are obtained using high-speed pressure measurements to obtain an indicator diagram of the 5th generation device. Additionally, frictional losses associated with the key sealing elements and moving components are calculated. An experimental validation of the spool seal friction sub-model is presented. All of these losses are combined into Pareto of losses for the 5th generation spool compressor. This Pareto identified the spool seals, compression and discharge flow losses, and the friction of the Top Dead Center interface as losses to be addressed in future designs. Using this information efforts to improve these components were integrated into a 6th generation spool compressor. This generation recorded an overall isentropic efficiency of over 80% for a net improvement of nearly 15 percentage points over the 5th generation spool compressor.