다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

http://repositorium.sdum.uminho.pt/bitstream/1822/48763/1/1-s2.0-S037026931200857X-main.pdf

Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC

https://digital.csic.es/bitstream/10261/108964/1/experiment%20at%20the%20LHC.pdf

Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

The ATLAS detector as installed in its experimental cavern at point 1 at CERN is described in this paper. A brief overview of the expected performance of the detector when the Large Hadron Collider begins operation is also presented.

The ATLAS Experiment at the CERN Large Hadron Collider

National Institute of Standards and Technology における超伝導研究及び生活

This paper presents a three dimensional geometric optimization of cooling channels in forced convection with internal heat generation within the solid. Three configurations were studied, circular channels, square channels and rectangular channels with different porosities. The configurations were optimized in such a way that the peak temperature is minimum. The optimization is subject to the constraint of fixed volume and solid material. The fluid is forced through the channels by the pressure difference across the channels. The structure has two degrees of freedom as design variables: channel hydraulic diameter and channel-to-channel spacing. The results obtained show the behaviour of the applied pressure drop on the optimized geometry. Results also show that as pressure drop increases the minimized peak temperature decreases.Copyright © 2010 by ASME

Geometric Optimisation of Forced Convection in Cooling Channels With Internal Heat Generation

http://ihtcdigitallibrary.com/download/article/707804ba57d423a4/IHTC16-23113-2_N.pdf

Experimental investigation of condensation heat transfer coefficients in an inclined smooth tube at low mass fluxes

A wide range of measurements was performed on the performance of the refrigerants R134a, R-290 (propane), R-404A, R-407c, R-410A, and R-22 in a vapor compression experimental set-up. The results were used to evaluate andcompare the following performance criteria: cooling capacity, coefficient of performance, compressor discharge temperature, input power, refrigerant mass flow, pressure ratio, and volumetric refrigeration capacity. The measurements were taken over a wide range of evaporating temperatures from -20°C to 20°C at a condensing temperature of 55°C on the same experimental set-up. This wide selection of evaporating temperatures makes it possible to predict the performance of air-conditioning and refrigeration equipment. The results were used to compare the performances of the different refrigerants as possible substitutes for R-22. It was concluded that propane is a good long-term replacement for R-22.

The performance of the refrigerants R-134a, R-290, R404a, R-407c and R-410a in air conditioners and refrigerators

Heat transfer enhancement in receivers of parabolic trough collectors offers several benefits including reduction in absorber tube circumferential temperature differences, reduced emissivity of the absorber tube selective coating, thus improved thermal and thermodynamic performance of the receiver. In this work, heat transfer enhancement in a parabolic trough receiver using perforated conical inserts was numerically investigated. The analysis was carried out for dimensionless insert’s cone angles in the range 0.40–0.90, dimensionless insert spacing in the range 0.06–0.18 and dimensionless insert size in the range 0.45–0.91. The flow was considered fully developed turbulent with Reynolds numbers in the range 1.02 × 104 ≤ Re ≤ 7.38 × 105 depending on the temperature of the heat transfer fluid. The heat transfer fluid temperatures used were 400 K, 500 K, 600 K and 650 K. The numerical solution was obtained using the finite volume method together with the realizable k-e model for turbulence modeling. From the study, there is a range of Reynolds numbers and geometrical parameters for which the gain in performance is more than the increase in pumping power due to heat transfer enhancement. The use of perforated conical inserts in the receiver’s absorber tube increases the thermal efficiency in the range 3–8% for some range of geometrical parameters.Copyright © 2014 by ASME

Josua P. Meyer

Papers

Geometric Optimisation of Forced Convection in Cooling Channels With Internal Heat Generation

Experimental investigation of condensation heat transfer coefficients in an inclined smooth tube at low mass fluxes

The performance of the refrigerants R-134a, R-290, R404a, R-407c and R-410a in air conditioners and refrigerators

Thermal Performance of a Parabolic Trough Receiver With Perforated Conical Inserts for Heat Transfer Enhancement

Research trends in nanofluid and its applications: a bibliometric analysis