A unit that encloses a motor-compressor and a condenser of refrigerant fluid in a single hermetic casing is presented. After a description of the general advantages of the component compared with the traditional solution, as far as weight, size, cost and very low noise emission are concerned, experimental test results are presented. COP values in different working conditions show that a good en...

The plastic deformation and interface micro annulus of oil-well cement during acid fracturing are key reasons for the failure wellbore seal sustained casing pressure. However, most existing research ignores influence cooling effect fracturing, owing to which, design conditions in theoretical analysis may be inconsistent with those actual wellbore, calculation results biased. In this study, a no...

The photographic collections held by the University of Melbourne are a rich resource for those interested in the history of photography in Victoria. Notable collections include those of the Grainger Museum, the Ian Potter Museum of Art and the University of Melbourne Archives (UMA), all of which contain works by some of Victoria's best-known photographers. 1 Of particular significance, however,...

The effective utilization of micro hydropower sources is often realized through the use pumps as turbines (PAT). efficiency PAT about same that original pump. A further increase in and power output can be achieved by modifying parts interacting with flow, especially impeller adjacent volute casing draft tube. This paper presents a user-friendly calculation model Francis turbine design its appli...

Abstract This paper investigates cracking failure of the casing tube. There were longitudinal cracks in heavy oil thermal recovery well occurred an field. The fracture cause was analyzed by macrographic observation, chemical composition analysis, mechanical property test, metallographic scanning electron microscope (SEM) and residual stress calculation. results showed that crack failed originat...

Computer simulation of injection moulding process is a powerful tool for optimisation moulded part geometry, mould design and processing parameters. One the most frequent faults parts their warpage, which result uneven cooling conditions in cavity as well after ejection from down to environmental temperature. With computer it possible predict potential areas warpage apply remedies compensate/mi...

1Division of Plastic Surgery, Ottawa Hospital-Civic Campus, 2University of Ottawa, Faculty of Medicine Correspondence and reprints: Dr Michael Bell, The Ottawa Hospital, 402 – 1919 Riverside Drive, Ottawa, Ontario K1H 1A2. Telephone 613-739-5424, fax 613-739-7168, e-mail [email protected] Skin contact of breast prostheses is considered by many to be a significant cause of ongoing subclinical i...

The casing of large electrical generators can be deformed slightly by the rotor's magnetic field. The sound emission produced by these periodic deformations, which could possibly exceed guaranteed noise emission limits, is analyzed analytically and numerically. From the deformation of the casing, the normal velocity of the generator's surface is computed. Taking into account the corresponding s...