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contributor authorFerrando, Marco
contributor authorReboli, Tommaso
contributor authorReggio, Federico
contributor authorNiccolini, Carlo Alberto
contributor authorSilvestri, Paolo
contributor authorTraverso, Alberto
contributor authorSishtla, Vishnu
date accessioned2025-04-21T10:30:05Z
date available2025-04-21T10:30:05Z
date copyright11/15/2024 12:00:00 AM
date issued2024
identifier issn0742-4795
identifier othergtp_147_03_031029.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4306324
description abstractIn the current energy scenario, it is necessary to reduce fossil fuel consumption to achieve the far-sighted and stringent decarbonization goals. To date, heat is mainly produced through fossil fuels. Alternatively, electrically driven heat pumps can exploit renewable power to recover environmental and waste heat, offering energy efficient and environmentally friendly heating and cooling for applications ranging from domestic and commercial buildings to process industries. For this reason, they are expected to play a primary role in complementing or displacing natural gas boilers in the residential and industrial sectors in the near future. Centrifugal compressors are already used as prime movers of the working fluid in heat pumps, thanks to their industrial replicability, compact size, affordable costs, and good performance in terms of efficiency and low noise. However, they are subject to instabilities such as surge and stall like any other dynamic compressor and these phenomena develop quite differently than in classic open-loop systems such as gas turbines. In fact, such peculiarity is mainly due to the closed-loop configuration with real gases in two-phase conditions, occurring in typical heat pump cycles. In addition, heat exchangers also contribute to make these phenomena different from what is commonly studied. Compressor surge in closed-loop heat pump systems has received lower attention than other applications by the engineering community, lacking dedicated experimental characterization, and clear exposition of the phenomenon. The aim of this paper is to experimentally investigate the behavior of a centrifugal compressor installed into an innovative close loop heat pump system under stable and unstable conditions from both vibrational and fluid-dynamic points of view. The impact of the main process parameters on the evolution of the instability is shown, highlighting how surge cycles change by varying system operating conditions. The energy contents of surge cycles and pressure fluctuations are highlighted, using data postprocessing techniques such as fast Fourier transform and phase locked average. The vibro-acoustic analysis enrich the comprehension of the phenomena. The experimental results shown in this paper can be a basis for the future development of validated mathematical models of closed-loop heat pumps systems equipped with dynamic compressors operating under stable and unstable operating conditions.
publisherThe American Society of Mechanical Engineers (ASME)
titleCentrifugal Compressor Surge in Innovative Heat Pump: Fluid Dynamic and Vibrational Analysis
typeJournal Paper
journal volume147
journal issue3
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.4063547
journal fristpage31029-1
journal lastpage31029-11
page11
treeJournal of Engineering for Gas Turbines and Power:;2024:;volume( 147 ):;issue: 003
contenttypeFulltext


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