Means of filling gas-filled cars. Lecture No 7. Part 2. Design features of mobile automobile gas filling stations with liquefied petroleum gas (AGZS)

The characteristics and parameters of mobile means of transportation and refueling of LPG are given. The characteristics of a mobile automobile gas filling station of frame and frameless construction are analyzed. The basic technological scheme of the APCT-9611 gas tanker is given. The characteristics and operating principle of the shut-off and safety equipment of the transport tank are given. A design diagram of an electric pump for supplying LPG to a mobile gas tanker is presented. A schematic diagram of a reciprocating LPG flow volume Converter is presented. The features of the mechanical and electromagnetic LPG level indicator in a transport tank are described. A schematic diagram of a mobile universal (discharge/filling) gas process module UTMG-01 is shown. Keywords: liquefied petroleum gas; mobile frame and frameless construction of a tanker truck; characteristics and parameters of the station; gas equipment, pumping unit; gas meter; principle and operating modes of the LPG level indicator. [email protected]

The effect of different working fluids and internal geometries on the efficiency of evacuated tube heat pipe solar collectors

In this study, a heat pipe was modified with designed and manufactured inserts of specific profiles in order to investigate the effect of the internal geometries and working fluids on the efficiency of the evacuated tube heat pipe solar collector. The experimental rig was made of a mobile frame, an insulated water tank, a solar simulator and an evacuated tube heat pipe. Using an average irradiance of 700 watts per square meter, the indoor tests were conducted first on a heat pipe without any working fluid (dry mode) and later on the heat pipe containing, in turn, each of the six working fluids for each of the five geometries. Results show that, when inserting different profiles in the heat pipe, there is an enhancement of the heat transfer and hence an increase in the efficiency of the evacuated heat pipe solar collector.

‘Nothing Will Have Taken Place – Except Place ’: The Unsettling Nature of Camera Movement

In 1897, Stèphane Mallarme threaded this phrase through his culminating work of modern poetry ‘Un Coup de Des’. Michael Snow, commenting on his 1967 film Wavelength, another radical work of modernist vision, invoked Mallarme’s phrase and sets us thinking about how the moving image recreates/explores/questions the nature of place. The radical role of the moving image in providing new modes of our experience of space has been neglected or simply presented as a deviant deconstruction of a dominant commercial narrative cinema. Taking seriously the way the moving image provides new tools for our understanding of our place in a technological world, I will discuss moments of camera movement and the mobile frame in cinema practice, both commercial and avant-garde, historical and contemporary.

Simple Interim Check of Measuring Performance for X-Ray Computed Tomography Used as Coordinate Measuring System

Form and dimension measurements using X-ray computed tomography (X-ray CT) are useful in product development, reverse engineering, production control and quality certification. This is because X-ray CT systems can get three-dimensional 3D volumetric data on the full body of the target object all at once. The measurement space of 3D coordinate measuring systems (CMSs), which include X-ray CTs, are distorted by kinematic and other factors. This means that measurement space deformation should be compensated for precise dimensional measurement. The compensation function should also be occasionally checked. For the widely-used coordinate measuring machine (CMM), the mobile frame is stable over a long period, making it unnecessary to check whether the compensation function works well or not on the CMM. The mobile frame of the X-ray CT is less stable than that of a CMM, so the space deformation compensation function on X-ray CTs should be checked more often than that on CMMs to perform precise dimensional measurement using X-ray CTs. We propose a simple interim check method for an X-ray CT that is through repeated checking, assesses the long-term stability of the mobile frame of the X-ray CT.

Design Study of an Underground Detector for Measurements of the Differential Muon Flux

Since 2006 an underground laboratory is in operation in Unirea salt mine from Slanic Prahova Romania. A new rotatable detector for measurements of the directional variation of the muon flux has been designed and will be put in operation at the end of 2013. The detector will be used to investigate the possible presence of unknown cavities in the salt ore. Preliminary muon flux measurements performed in the underground of Slanic Prahova salt mine show an important variation of the flux with the thickness of the rock but indicate also that more precise data are necessary. Based on that, a modern detector using 4 layers of plastic scintillators bars has been designed. The detector is installed on a rotatable and mobile frame which allows precise directional measurements of the muon flux on different locations in the mine. In order to investigate the performances of the detector, detailed Monte Carlo simulations have been performed using several codes available on the market. The simulations show that the detector can be used for measurements of the differential flux of cosmic ray muons and for the detection of hidden cavities in the ore.

Singularity Equations of Gough–Stewart Platforms Using a Minimal Set of Geometric Parameters

So far, in the derivation of the singularity equations of Gough–Stewart platforms, all researchers defined the mobile frame by making its origin coincide with the considered point on the platform. One problem can be that the obtained singularity equation contains too many geometric parameters and is not convenient for singularity analysis, especially not convenient for geometric optimization. Another problem can be that the obtained singularity equation cannot be used directly in practice. To solve these problems, this work presents a new approach to derive the singularity equation of the Gough–Stewart platform. The main point is that the origin of the mobile frame is separated from the considered point and chosen to coincide with a special point on the platform in order to minimize the geometric parameters defining the platform. Similarly, by defining a proper fixed frame, the geometric parameters defining the base can also be minimized. In this way, no matter which practical point of the platform is chosen as the considered point, the obtained singularity equation contains only a minimal set of geometric parameters and becomes a solid foundation for the geometric optimization based on singularity analysis.

Singularity Equations of Gough-Stewart Platforms Using a Minimal Set of Geometric Parameters

So far, in the derivation of the singularity equations of Gough-Stewart platforms, all research works defined the mobile frame by making its origin coincide with the considered point on the platform. One problem can be that the obtained singularity equation contains too many geometric parameters and is not convenient for singularity analysis, especially not convenient for geometric optimization. Another problem can be that the obtained singularity equation cannot be used directly in practice. To solve these problems, this work presents a new approach to derive the singularity equation of the Gough-Stewart platform. The main point is that the origin of the mobile frame is separated from the considered point and chosen to coincide with a special point of the platform in order to minimize the geometric parameters defining the platform. Similarly, by defining a proper fixed frame, the geometric parameters defining the base can also be minimized. In this way, no matter which practical point of the platform is chosen as the considered point, the obtained singularity equation contains only a minimal set of geometric parameters and becomes a solid foundation for the geometric optimization based on singularity analysis.