We propose a scenario in which a large fraction, or even most, of the gas cooling to low temperatures of T < 10 K in cooling flow clusters, directly gains energy from the central black hole. Most of the cool gas is accelerated to nonrelativistic high velocities, vj ≃ 10 3 − 10 km s, after flowing through, or close to, an accretion disk around the central black hole. A poorly collimated wind (or...

The cooling circuit is an important component of the magnetic drive pump because it prevents demagnetization permanent magnet and damage to containment shell owing a high temperature increase. In this paper, flow field losses are discussed experimentally verified based on numerical simulation methods. Five different lengths couplings were designed, distribution, rate, loss variation laws analyz...

During extremely hot summer days, air conditioning systems are known as major electricity consumers in residential, commercial and industrial sectors. Moreover, high energy requirement of multiple-chiller plants may cause an interconnected power grid be faced with annual on-peak electrical demand, load-generation mismatch, voltage collapse and catastrophic wide area blackout. Therefore, this pa...

One of the most important methods of transporting natural gas in Iran and other parts of the world is the utilization of a network of pipelines. Compression station and turbo compressor units play an important role in gas supply through pipelines. One of the primary concerns in these units is the reduction of fuel consumption. By cooling of exhaust gas from the source station, the pressure ...

the aim of this manuscript is to study the implication of aluminium-oxide nanofluid for an amphibious vehicle engine (viable on land and under water) cooling system both analytically and experimentally. to achieve this, a one-dimensional model of the engine cooling system (radiator) is considered through a computational fluid code in which the mass flow rate for a range of the coolant temperatu...

As one of the most widely used units in water cooling systems, the closed wet cooling towers (CWCTs) have two typical counter-flow constructions, in which the spray water flows from the top to the bottom, and the moist air and cooling water flow in the opposite direction vertically (parallel) or horizontally (cross), respectively. This study aims to present a simplified calculation method for c...