Increase of the energy plant efficiency in special conditions of its operation

This article deals with energy plant analysis during its operation in special conditions. For this purpose, modernized system of air supply and high-temperature refrigeration is suggested. Application of these systems allows to decrease specific fuel rate by 2.6%

Increase of the energy plant efficiency in special conditions of its operation

This article deals with energy plant analysis during its operation in special conditions. For this purpose, modernized system of air supply and high-temperature refrigeration is suggested. Application of these systems allows to decrease specific fuel rate by 2.6%

Набухание образцов автомобильных резинотехнических изделий в стандартной жидкости, моторном масле и триботехническом компаунде

In this paper the change in the properties of rubber products of automobile under the influence of temperatures and when working in an aggressive environment was studied by authors. The radial tire protector samples (Barum 155/70 R13 75T Brillantis 2) with dimensions not exceeding 2×10-2×1.5×-2×5×10-3 [m], seal samples (of 2108-170342-01 type) in the form of a semicircle of 2.7·10-2×7·10-3×2·10-3 [mm] size, both original and aged rubber samples were tested. Aging was carried out in a stream of air, forcibly pumped through the reactor with the rubber placed in it. The heat treatment time was 12-100 hours, the temperature was 70-150 ° C. The change in the properties of rubber was evaluated by the parameter of the change in the mass of the samples (original and aged) after their contact with the liquid. The resistance of rubber to the action of liquids was studied, the kinetics of rubber swelling was studied. As the standard liquid the isooctane (2,2,4-trimethylpentane) was used. The experiments were carried with synthetic engine oil (SEO) “GENESIS CLARITECH” 5W-30 and tribotechnical composition (tribotechnical compounds; TC) “ACTIVE PLUS” (“suprotec”). The use of tribotechnical composition as a test fluid for rubbers was motivated by the purpose of assessing the chemical activity of the “suprotec”, when used in engines operating under conditions of high loads. The kinematic viscosity of SEO and TC was determined (in the temperature range from 20 ° C to 100 ° C) by the HPLC-4 viscometers, the density (ρ) of the liquids was measured with oil-meters. The hardness of the rubber samples was evaluated by measuring the resistance of the rubber by immersion of the indenter (a spring-loaded rod) into it. The indicator of the hour type ICh-02 (accuracy class 0) was used as a gauge.В работе исследовалось изменение свойств резинотехнических изделий автомобиля под влиянием температур и при работе в агрессивной среде. Испытаниям подвергались образцы протектора радиальной шины (Barum 155/70 R13 75T Brillantis 2) габаритами не более 2×10-2×1.5×-2×5×10-3 [м], пробы уплотнителя (сальник; тип 2108-170342-01) в форме полукруга размером 2.7·10-2×7·10-3×2·10-3 [мм], как исходные, так и состаренные образцы резины. Старение проводилось в потоке воздуха, прокачиваемого принудительно через реактор c помещенной в него резиной. Время тепловой обработки составляло 12-100 часов, температура - 70-150°С. Изменение свойств резины оценивали по параметру изменения массы образцов (исходных и состаренных) после их контакта с жидкостью. Исследовалась стойкость резины к воздействию жидкостей, изучалась кинетика набухания резины. В качестве стандартной жидкости использовался изооктан (2,2,4-триметилпентан). Проводились также опыты с синтетическим моторным маслом (ММ) «GENESIS CLARITECH» 5W-30 и триботехническим составом (триботехническая композиция; ТС) «ACTIVE PLUS» («супротек»). Использование триботехнического состава в качестве испытательной жидкости для резин мотивировалось целью оценить химическую активность «супротека» при его применении в двигателях, работающих в условиях больших нагрузок. Кинематическая вязкость ММ и ТС определялась (в интервале температур от 20°С до 100°С) вискозиметрами ВПЖ-4, плотность (ρ) жидкостей измерялась нефтеденсиметрами. Твердость образцов резины оценивалась посредством измерения сопротивления резины погружению в нее индентора (подпружиненного стержня). В качестве измерителя использовали индикатор часового типа ИЧ-02 (класс точности 0)

The Super C-

The Super C-τ (SCT) Factory at Novosibirsk is a project of new colliding beam experiment proposed in Budker Institute of Nuclear Physics. Electron-positron collider based on Crab-Waist technique for operation energy range 2–5 GeV in center of mass is suggested. The luminosity up to 1035cm−1s−1 (in 100 times higher than in operated today experiments in this energy region) is expected. To perform broad experimental program of the project successfully the excellent particle identification (PID) system is needed. A number of options are under consideration. Three of them are described in the paper: Focusing Aerogel RICH (FARICH) detector, threshold Cherenkov counters based on ASHIPH (Aerogel SHifter PHotomultiplier) technique with 6000 litres of aerogel of two refractive indexes and time-of-flight counters with TOP (Time of Propagation) approach with time resolution better than 30 ps. Comparison of PID capabilities with help of parametric simulation is given

CMD-3 Overview

The CMD-3 detector is installed at the VEPP-2000 e+e− collider at BINP (Novosibirsk, Russia). It is a general-purpose detector, equipped with a tracking system, two crystal (CSI and BGO) calorimeters, liquid Xe calorimeter, TOF and muon systems. The main goal of experiments at CMD-3 is a study of exclusive modes of e+e−→ hadrons at energies s≤2$\sqrt s \le$ GeV. In particular, these results provide an important input for calculation of the hadronic contribution to the muon anomalous magnetic moment. The first round of data taking was performed in 2011–2013, when about 60 1/pb were taken in the center-of-mass (c.m.) energy range from 0.32 to 2.0 GeV. Here we present a survey of results of data analysis. Between 2013 and 2016 the collider and the detector were upgraded. The data taking resumed by the end of 2016. In the first run after the upgrade about 50 1/pb were collected at the energy range between 1.28 and 2.007 GeV. We discuss the upgrade and the first preliminary results from the new data

Current status of luminosity measurement with the CMD-3 detector at the VEPP-2000 collider

The CMD-3 detector started data taking at the electron-positron collider VEPP-2000 [1] in December 2010. The collected data sample corresponds to an integrated luminosity of 87 pb−1 in the c.m. energy range from 1.06 up to 2 GeV and 91 pb−1 from 0.32 to 1.06 GeV. The integrated luminosity was measured by counting e+e−→ e+e− and e+e−→ γγ events, allowing additional photons in the final state. Preliminary results of the luminosity measurement are presented for various energy ranges and its accuracy is estimated to be 1%

CMD-3 Overview

The CMD-3 detector is installed at the VEPP-2000 e+e− collider at BINP (Novosibirsk, Russia). It is a general-purpose detector, equipped with a tracking system, two crystal (CSI and BGO) calorimeters, liquid Xe calorimeter, TOF and muon systems. The main goal of experiments at CMD-3 is a study of exclusive modes of e+e−→ hadrons at energies $\sqrt s \le$ GeV. In particular, these results provide an important input for calculation of the hadronic contribution to the muon anomalous magnetic moment. The first round of data taking was performed in 2011–2013, when about 60 1/pb were taken in the center-of-mass (c.m.) energy range from 0.32 to 2.0 GeV. Here we present a survey of results of data analysis. Between 2013 and 2016 the collider and the detector were upgraded. The data taking resumed by the end of 2016. In the first run after the upgrade about 50 1/pb were collected at the energy range between 1.28 and 2.007 GeV. We discuss the upgrade and the first preliminary results from the new data