Handbook of Research on Advances and Applications in Refrigeration Systems and Technologies

Handbook of Research on Advances and Applications in Refrigeration Systems and Technologies
Author: Gaspar, Pedro Dinis
Publisher: IGI Global
Total Pages: 1037
Release: 2015-08-28
Genre: Technology & Engineering
ISBN: 1466683996

In recent years, the sustainability and safety of perishable foods has become a major consumer concern, and refrigeration systems play an important role in the processing, distribution, and storage of such foods. To improve the efficiency of food preservation technologies, it is necessary to explore new technological and scientific advances both in materials and processes. The Handbook of Research on Advances and Applications in Refrigeration Systems and Technologies gathers state-of-the-art research related to thermal performance and energy-efficiency. Covering a diverse array of subjects—from the challenges of surface-area frost-formation on evaporators to the carbon footprint of refrigerant chemicals—this publication provides a broad insight into the optimization of cold-supply chains and serves as an essential reference text for undergraduate students, practicing engineers, researchers, educators, and policymakers.

Turbojet Engine Noise Reduction with Mixing Nozzle-ejector Combinations

Turbojet Engine Noise Reduction with Mixing Nozzle-ejector Combinations
Author: Willard D. Coles
Publisher:
Total Pages: 652
Release: 1958
Genre: Airplanes
ISBN:

Several noise suppressors consisting of combinations of mixing nozzles and ejectors were tested on two full-scale turbojet engines. Maximum sound pressure level reductions of 12 decibels and sound power level reductions of 8 decibels were obtained. The ejectors provided 3 to 5 decibels of the sound power reduction. The effects of ejector dimensions on noise suppression and engine performance were investigated. Ejector lengths of approximately 2.0 standard nozzle diameters and ejector diameters larger than 1.6 standard nozzle diameters provided the greatest additional noise reduction to that obtained with the mixing nozzles alone. The ejector can restore the static thrust loss caused by use of the mixing nozzle or can provide static-thrust augmentation.

Advances in Applied Mechanics and Materials

Advances in Applied Mechanics and Materials
Author: Bambang Pramujati
Publisher: Trans Tech Publications Ltd
Total Pages: 800
Release: 2014-01-08
Genre: Technology & Engineering
ISBN: 3038263710

Selected, peer reviewed papers from the International Conference on Mechanical Engineering (ICOME 2013), September 19-21, 2013, Mataram, Lombok, Indonesia

Ejectors for Efficient Refrigeration

Ejectors for Efficient Refrigeration
Author: Giuseppe Grazzini
Publisher: Springer
Total Pages: 192
Release: 2018-03-21
Genre: Technology & Engineering
ISBN: 3319752448

Encompassing both practical applications and recent research developments, this book takes the reader from fundamental physics, through cutting-edge new designs of ejectors for refrigeration. The authors’ unique vision marries successful design, system optimization, and operation experience with insights on the application of cutting-edge Computational Fluid Dynamics (CFD) models. This robust treatment leads the way forward in developing improved ejector technologies. The book covers ejectors used for heat powered refrigeration and for expansion work recovery in compression refrigerators, with special emphasis on two-phase flows of “natural” fluids within the ejector, i.e. steam and carbon dioxide. It features worked examples, detailed research results, and analysis tools.

Analysis of Rocket-powered Ejectors for Pumping Liquid Oxygen and Liquid Hydrogen

Analysis of Rocket-powered Ejectors for Pumping Liquid Oxygen and Liquid Hydrogen
Author: Leo C. Franciscus
Publisher:
Total Pages: 44
Release: 1970
Genre: Liquid hydrogen
ISBN:

A preliminary analysis of the use of rocket-powered ejectors for pumping liquid oxygen and liquid hydrogen in rocket engines was made. The drive gas is the exhaust gas of a smaller hydrogen-oxygen rocket engine. The analysis is one-dimensional and does not include shock or friction losses. For a nominal drive rocket chamber pressure of 600 psia (4.14 N/m (to the second power) abs), ideal discharge pressures over 2500 psia (17.25X10 (to the sixth power) N/m (to the second power) abs) for oxygen and 400 psia (2.75x10 (to the sixth power) N/m (to the second power) abs) for hydrogen were calculated. Ejector mass ratios (ratio of oxygen or hydrogen mass flow to drive gas flow) resulting in good performance were on the order of 300 for oxygen and 200 for hydrogen.

Ejectors for Efficient Refrigeration

Ejectors for Efficient Refrigeration
Author: Giuseppe Grazzini
Publisher: Springer
Total Pages: 180
Release: 2019-01-12
Genre: Technology & Engineering
ISBN: 9783030091804

Encompassing both practical applications and recent research developments, this book takes the reader from fundamental physics, through cutting-edge new designs of ejectors for refrigeration. The authors’ unique vision marries successful design, system optimization, and operation experience with insights on the application of cutting-edge Computational Fluid Dynamics (CFD) models. This robust treatment leads the way forward in developing improved ejector technologies. The book covers ejectors used for heat powered refrigeration and for expansion work recovery in compression refrigerators, with special emphasis on two-phase flows of “natural” fluids within the ejector, i.e. steam and carbon dioxide. It features worked examples, detailed research results, and analysis tools.