نتایج جستجو برای: pump installation operation and maintenance
تعداد نتایج: 16876295 فیلتر نتایج به سال:
Water supply systems are massive consumers of energy, which is consumed in each of the stages of the water production and supply chain: starting from pumping the water to the water treatment plant, along the treatment process and while distributing the water via the network. Energy efficiency may be achieved by improving the pump station design, system design, installation of Variable Speed Dri...
The reducing in the pressure characteristic of submersible pump during operation occurs as a result combined action number reasons. Pumping equipment wears out due to waterjet destruction flow channels. characteristics pumps are captured at factory on special stands. At large group groundwater intakes, wells equipped with an automated control system that allows testing workplace and promptly ma...
INTRODUCTION- Cardiovascular disease has emerged as a major health burden worldwide with coronary artery disease [CAD] causing highest mortality and morbidity. Coronary revascularization is the preferred treatment for patients with multivessel CAD. Based on the application of cardiopulmonary bypass [CPB], Coronary revascularization can be on-pump [OPCAB] or off-pump [CABG].The CPB is known to h...
Design and construction process of special kind of sputter ion pump is described briefly in this paper. In order to investigate the optimization of effective parameters in choosing and designing ILSF ion pumps, this pump has been designed and manufactured. By optimizing some parameters such as dimension and shape of penning cells, anode voltage, magnetic field and internal structure of pump, it...
Maintenance helps to extend equipment life by improving its condition and avoiding catastrophic failures. Appropriate model or mechanism is, thus, needed to quantify system availability vis-a-vis a given maintenance strategy, which will assist in decision-making for optimal utilization of maintenance resources. This paper deals with semi-Markov process (SMP) modeling for steady state availabili...
cardiovascular disease is the leading reason of morbidity in older people. coronary artery bypass graft (cabg) surgery is the most common type of operations in world. this study was designed to characterize comparison of early clinical outcome following on pump vs. off pump in patients over 70 years old with triple vessels disease and severe left ventricle dysfunction. 80 patients were divided ...
apart from regular wheel wear such as decreasing wheel diameters and reduced flange thicknesses and heights, wheel flats (wf) and oval wheels (or oor, out-of-roundness) are the most common wheelset problems for railway vehicles. within the fp7 research project “saferail”, apt has developed an innovative wheelset monitoring system so-called “wheel flat and out of roundness monitoring (worm) syst...
abstract this study examined the relationship between noticing pronunciation and the improvement pronunciation by administering a 50 item story, as proficiency- test in order to investigate the effectiveness of noticing pronunciation on the improvement of pronunciation. accordingly 60 qualified students were selected and assigned to the two groups of experimental and control randomly, each gr...
purpose a metabolic abnormality such as obesity is a major obstacle in the maintenance of the human health system and causes various chronic diseases including type 2 diabetes, hypertension, cardiovascular diseases, as well as various cancers. this study was designed to summarize the recent scientific knowledge regarding the anti-obesity role of curcumin (diferuloylmethane), which is isolated f...
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