...Mechanical pumps may be submerged in the fluid they are pumping or external to the fluid. Pumps can be classified by their method of displacement into positive displacement pumps, impulse pumps, velocity pumps, gravity pumps, steam pumps and valveless pumps. Positive displacement pump A lobe pump lobe pump internals Mechanism of a scroll pump A positive displacement pump makes a fluid move by trapping a fixed amount and forcing (displacing) that trapped volume into the discharge pipe. Some positive displacement pumps use an expanding cavity on the suction side and a decreasing cavity on the discharge side. Liquid flows into the pump as the cavity on the suction side expands and the liquid flows out of the discharge as the cavity collapses. The volume is constant through each cycle of operation. Positive displacement pump behavior and safety Positive displacement pumps, unlike centrifugal or roto-dynamic pumps, theoretically can produce the same flow at a given speed (RPM) no matter what the discharge pressure. Thus, positive displacement pumps are constant flow machines. However, a slight increase in internal leakage as the pressure increases prevents a truly constant flow rate. A positive displacement pump must not operate against a closed valve on the discharge side of the pump, because it has no shutoff head like centrifugal pumps. A positive displacement pump operating against a closed discharge valve continues to produce flow and the pressure in the discharge...
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...Table 1. Advantages and Disadvantages of Various Centrifugal Pumps* | ADVANTAGES | Volute Pumps | Diffuser Pumps | Turbine Pumps | Propeller Pumps | Available in a wide range of sizes | X | X | X | X | Simple construction | X | | | X | Relatively quiet operation | X | X | X | X | Robust with a long life | X | X | | X | Available in a wide variety of materials | X | X | | X | Can handle liquids containing solids | X | X | | X | Can handle liquids with a high proportion of vapor | | | X | | Self-priming | | | X | | Variable speed drive units not required to adjust the capacity | X | X | X | X | Pressure and power developed are limited at shutoff | X | X | X | X | DISADVANTAGES | | Unsuitable for pumping high viscosity liquids | X | X | X | X | Heads developed are limited | X | X | X | X | Close clearances | | | X | | * After Holland and Chapman, 1966. | Table 2. http://www.slideserve.com/Olivia/pumps-and-pumping Propeller Pumps | Available in a wide range of sizes | X | X | X | X | Simple construction | X | | | X | Relatively quiet operation | X | X | X | X | Robust with a long life | X | X | | X | Available in a wide variety of materials | X | X | | X | Can handle liquids containing solids | X | X | | X | Can handle liquids with a high proportion of vapor | | | X | | Self-priming | | | X | | Variable speed drive units not required to adjust the capacity | X | X | X | X...
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...oSlurry pump solutions for the oil and gas industry Weir Minerals Hazleton Excellent Minerals Solutions Weir Minerals is committed to delivering long term solutions to the petroleum industries’ most difficult pumping needs. When the petroleum industry expose their pumping systems to erosive materials, such as coke, catalyst, sand, ash, coal or shale the pumps selected need to be durable, reliable, and of the highest quality. Since 1916, Weir Minerals has supplied long term slurry pumping solutions focused on longevity and reliability to meet the demands of challenging applications for the petroleum industry. The petroleum industry demands performance and pump reliability. Weir Minerals specializes in slurry systems and has been able to exceed the robust demands of the petroleum industry. Our Engineered-ToOrder slurry pumps are designed with longevity in mind to deliver reduced process down time and maintenance costs by extending mean times between planned maintenance intervals. To meet the customer’s requirements Hazleton slurry pumps are engineered to order for each application and incorporate design features and standards that not only ensure durability and reliability, but also differentiate us from the competition. Some of which include: • Hydraulic design incorporates unique “Controlled Diffusion” process to minimize erosive vortices and reduce volute velocities for longer wear life Utilization of materials and specialty coatings to achieve maximum wear life...
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...Pump & Valve Industry – Overview & Opportunities About Singhi Advisors Your Partners in Growth . . . Private & Confidential Singhi Advisors Advantage Singhi Two Decades of delivering Success… Full service Investment bank with strong capabilities in M&A, PE & India Entry Strategy Many Services…One Goal MERGERS & ACQUISITIONS INDIA ENTRY STRATEGY PRIVATE EQUITY One of the top ten Investment Bankers and winner of the M&A Atlas Awards – Deal of the Year 2011, ACQ Global Award 2009 for ‘Corporate and M&A Advisory firm of the year-India’ o Co po ate a d & dv so y o t e yea da Multi–dimensional focus, covering all major sectors and industries Current focus with mid market and growing Corporates, while having strong relationships with top business houses in the country E Experienced & S bl M i d Stable Management, l di leading a team of >35 f 35 professionals, 70% of the team averaging 6+ years with Singhi Strong relationship and confidence from existing clients with 60% repeat business and 80% strike rate Live relationship with >250 Corporates, resulting in >800 ve e at o s p w t 50 Co po ates, esu t g 800 completed assignments. CORPORATE RESTRUCTURING DEBT SYNDICATION CORPORATE ADVISORY Global Reach Exclusive Indian Member of “Mergers-Alliance”, a leading international network of independent Investment Banking Firms and Corporate Finance advisory firms offering seamless services on mid-market transactions With the successful closure of more than 90 transactions...
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...the study of a gear pump & its manufacturing process. The project is study material type project. In that we are having a working model of gear pump. We are studying the principle of working, manufacturing process & its application. Based on this study, we are making a report which will be benefited to students who will study the subject INDUSTRIAL FLUID POWER. Working model is useful in our laboratory & useful for better understanding the working of gear pump to the student in future. Chapter 1 BASICS OF PUMPS 1. INTRODUCTION 1.1 What are pumps and pumping systems? Pump is a device which is used to pumping the fluid at various heights. It is similar to the heart in the human body. A hydraulic pump is a mechanical device which converts mechanical energy into hydraulic energy. It provides the force necessary to move a liquid, thus transmitting power. Pumping systems account for nearly 20% of the world’s electrical energy demand and range from 25-50% of the energy usage in certain industrial plant operations. Pumps have two main purposes: Transfer of liquid from one place to another place (e.g. water from an underground aquifer into a water storage tank) Circulate liquid around a system (e.g. cooling water or lubricants through machines and equipment) The main components of a pumping system are: Pumps (different types of pumps are explained in section...
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...* Learning Objective : Know the marine pump, types, design features and operation on board. * Specific Learning Objectives : • State the design features of centrifugal and positive displacement pumps. • State the uses of various pumps onboard. • Explain the pump types and principles of operation of marine pump. • State and explain the operation of each components of the following pump; Reciprocating pump. Screw pump. Gear pump. Centrifugal pump • With the aid of diagram, explain the type and working principle of the gland seals. • State the requirement of relief valves that may be fitted on marine pumps. • State the requirement of air vessel that may be fitted on marine pumps. * Key Functions of Pumps : • Raise the liquid from one level to another • To give it a high velocity • To transport it through a pipe • To move it against resistance • To force it through a hydraulic system against various resistance * Main Classification : • Positive Displacement pumps • Dynamic pressure pumps (rotor-dynamic pumps or nonpositive displacement pumps) * Positive Displacement pumps : • This is one in which a definite volume of liquid is delivered for each cycle of pump operation, regardless of the resistance offered. In other word in which one or more chambers are alternately filled then emptied. • These include reciprocating, gear, screw, etc …They do not required a priming device, in fact they may used as priming devices...
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...ABSTRACT: Pistonless pump for rocket has been proved to be the most economical than piston pump or turbopump. In pistonless pumps, piston is absent. It has very much less rotating parts than that of piston pumps or turbo pumps. So, it has less friction losses and there by it helps to improve the efficiency of the engine considerably.They can be easily installed in the rocket than turbopumps.Also,it reduces the weight of rocket. This article discusses the working , advantages of pistonless pump over turbopump. Pistonless pumps are 80-90% economical than that of piston pump or turbo pumps.Nasa has manufactured such kind of pump and tested it actually,and they found it works conveneiently. I NTRODUCTI ON: NASA have developed a Low cost rocket fuel pump which has Comparable performance to turbopump at 80-90% lower cost. Perhaps the most difficult barrier to entry in the liquid rocket business is the turbo pump. A turbo pump design requires a large engineering effort and is expensive to mfg. and test. Starting a turbo pump fed rocket engine is a complex process, requiring a careful of many valves and subsystems.In fact ,Beal aerospace tried to avoid the issue entirely by building a huge pressure feed booster. Their booster never flew, but the engineering behind it was sound and ,if they had a low cost pump at their disposal ,they might be competing against Boeing. This pump saves up to 90% of the mass of the tanks as compared to a pressure fed system. This pump has really proved...
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...Summary A solar powered pump is a pump running on electricity generated by photo voltaic. Unlike a normal pump, solar power pump being powered by the renewable electricity generated from the sun. Basically, a solar power pump consists of 4 parts which is the actual fluid pump, the controller, the engine which usually powered by electric motor and the energy source being powered by the sun. Dr. Mohd. Azree named this project as solar power pump and being assigned to all group leader of the class. The main objective of this project is to select a solar power pump by identifying whether the existing of pump is really ideal or need to be replaced. Actually, there is already had existing solar power pump build at BH building and in order to achieve our main objective, early research need to be done about the existing solar power pump which lead by Mr.Halil. Besides that, details calculation will be done in order to approve the existing pump suitable or not. Discussion about the project will also be done and some recommendation will be list out if the existing pump is not suitable. Lastly, I hope that this project will achieve the target and will bring benefit to the future research in solar power pump area. Abstract This project serves the purpose of being a validation to the existing solar powered water pumping system installed in Universiti Tenaga Nasional (UNITEN). The solar powered pump is an effort of UNITEN’s collaboration with an agency that are investing in providing...
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...2004. This summary page includes recent updates to the topic since publication. SUMMARY OF actIONS tOwarDS SuStaINable OutcOMeS Introduction Alternative low energy air conditioning solutions are now commonly sought in preference to typical air conditioning systems for both residential and commercial applications. The industry has seen a growing emergence of ground source heat pump (GSHP) installations throughout Australia over the last five years. A broad spectrum of facilities ranging from domestic housing, hospitals, education facilities, commercial offices and civic buildings to name a few, are now realising the environmental benefits offered by GSHP systems over more commonly used air conditioning systems. This summary note provides a brief overview of the previous note and provides an update on changes that have occurred since. basic Strategies Heat rejection is fundamental to all air conditioning systems. Typically, unsightly roof mounted air cooled condensers and cooling towers are by far the most commonly used method for rejecting heat from a building. Ground source heat pumps are somewhat different to the norm. Basically GSHP are refrigeration machines that provide heating and cooling by using ground water and the earth as a medium to reject and/or absorb heat and as such do not require air cooled condensers or cooling towers. This is made possible because ground temperatures are stable, remaining relatively constant throughout the year. During summer when...
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...Lilly’s Insulin Pump Healthcare Nursing Short paper Having type 1 diabetes is a major comorbidity in young and older adults. Diabetes education is the mostly taught by the healthcare providers, nurses, and nutritionists. In the case of Lilly who has an Associate Degree in Computer Drafting, needs more education on the insulin pump usage. Lilly and her husband have reported to the community health clinic that there was malfunctioning of Lilly’s insulin pump and having difficulty of following the manufacturer’s instructions. According to the health clinic personnel, the insulin pump was functioning normal. Lilly and her husband need to have reinforced insulin pump education that will satisfied their needs and for Lilly’s safety. Lilly’s age and her husband is unknown in this case study. In this paper, various communications, teaching methods and tools will be used to help and to assist Lilly and her husband about the safety uses of the insulin pump in three different possible age groups to fit their learning needs. Physical and mental assessments are need to give clear understanding what needs to be address before teaching the insulin pump for both Lilly and her husband. Is Lilly capable of using the insulin pump? Do Lilly or her husband have any history of cognitive disabilities such as dementia, Parkinson’s disease, Alzheimer’s disease and other neuro impairments? Does Lilly check her glucose finger sticks accordingly as prescribed by the healthcare provider...
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...Industries and Heavey Pumps Section 2 Case 1 Chris Stowe Student number: 14210009 2014.11.19 Word Count: 1719 CJ Industries has an opportunity to provide Great Lakes Pleasure Boats with key engine components for their luxury line of pleasure boats. They earned this through the development of a strong buyer-supplier relationship with Great Lakes and this 5-year, $10 million annual contract offers them the chance to have an extended relationship if they can satisfy Great Lakes’ needs. The opportunity is critical for the successful future of CJI and the main goal of the company should be to completely satisfy the requirements of the contract with Great Lakes, and secure their future business with Great Lakes. While they do most manufacturing in-house, they have been sourcing their bilge pumps out to Heavey Pumps on an informal basis. While Heavey has been a reliable supplier, they are a small company and the expanded business will stress their production capabilities; so CJI has been contemplating whether to build the pumps in-house, or continue to subcontract them. Here are the questions from the reading regarding this issue: What are all the issues here, from both CJI’s and Heavey’s perspectives, that need to be researched by Mr. Ashby? From CJI’s perspective: Their number one priority is to maintain contract compliance with Great Lakes because it is the future of their business growth and success. With that in mind, they need to ensure the pumps from Heavey will arrive...
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...Don’t Underestimate the Power of the Pump In April 2013, The Joint Commission published a Sentinel Event Alert describing a patient death that occurred secondary to a delayed response to a device alarm. This same article describes two of the most common contributing factors reported are alarm fatigue and alarm settings that are not customized to the individual patient or patient population. Recommendations made by both the Association for the Advancement of Medical Instrumentation (AAMI) and ECRI Institute included the need to “establish guidelines for tailoring alarm settings and limits for individual patients. The guidelines should address situations when limits can be modified to minimize alarm signals and the extent to which alarms can be modified to minimize alarm signals.” Additional recommendations included to define a process for continual improvement and constant optimizing of alarm systems policies and configurations. Intermountain Healthcare is a nonprofit healthcare system of 22 hospitals with a Medical Group of more than 185 physician clinics covering patients in Utah and southeastern Idaho. In July 2013, the quality and safety teams of Intermountain Healthcare followed the recommendations from the AAMI and ECRI organizations and convened a task force to evaluate the many devices in use within our facilities and analyze the alerts and alarms that correspond to those devices. One of these devices, the infusion pump, has allowed for a very accurate analysis of infusion...
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...Air Conditioning and Heat Pump Systems Clinton Ward COM155 February 17, 2013 Joyce Keeling Air Conditioning and Heat Pump Systems Air conditioners and heat pump systems are used by most people in the world today. They are used to cool in the summer time and to heat in the winter time. These machines are bought and used when most people do not even understand the principle on which they work. The machines are expected do what they are designed to do, and when they cease to do this, they can be costly to repair. Air conditioners and heat pumps are similar in appearance and operation, but while using the same components they can perform completely different tasks. Knowing the difference between the two and the principle in which they perform their tasks will enable each person to make an informed decision when the time comes to repair or replace a piece of equipment. Air conditioners and heat pumps have several components that work in the same way. The compressor is the heart of the system. It is present in both an air conditioner and a heat pump. The compressor pumps the refrigerant throughout the system and enables the system to heat and cool. A few other components in an air conditioner and a heat pump are the metering device, the indoor coil, and the outdoor coil. These four basic components must be present for the cooling process to take place. There are a few components in heat pumps that do not show up in air conditioners. These devices are what make the...
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...relationship if they can satisfy Great Lakes’ needs. The opportunity given to CJI is very critical for the success of their company, and the principal goal of the company should be to fully satisfy the requirements of the contract with Great Lakes, and secure their future business with Great Lakes. CJI has been doing most manufacturing in-house, however, they have been sourcing their bilge pumps out to Heavey Pumps on an informal basis. Heavey has been a reliable supplier, however, their company is small and the expanded business will stress their production capabilities, so CJI has been planning whether to build the pumps in-house, or continue to subcontract them. III. Problem Statement Normally, CJI orders a batch of 50 bilge pumps eight to ten weeks ahead of time which occurred every four to six months. However, there is a new demand now of 50 pumps per month or more depending on Great Lakes’ demand and CJI’s ability to perform. CJI is now faced with the problem that with this new demand, Heavey Pumps might not have the ability or the willingness to increase their production of bilge pumps especially to be supplied in a...
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...Impianti chimici II Monographic Thesis ADSORPTION HEAT PUMPS USING THE ZEOLITE-WATER PAIR: Operating principle and applications Author: Federica FURNARI 1 SUMMARY Introduction ___________________________________________________________________ 3 Chapter 1 Why choosing water-zeolite? ____________________________________________________ 5 Chapter 2 Operating principle of water-zeolite heat pump ____________________________________ 8 Chapter 3 Technological applications _____________________________________________________ 11 Solar-powered adsorption icemakers _____________________________________________________ 12 Self chilling beer kegs _________________________________________________________________ 15 Solar-powered adsorption air conditioners ________________________________________________ 16 Chapter 4 Key issues for future development _______________________________________________ 18 The heat/mass transfer issue ___________________________________________________________ 19 Heat recovery _______________________________________________________________________ 21 Bibliography _________________________________________________________________ 24 2 Introduction Although adsorptive processes have been extensively studied for gas separation, catalysis, etc., it is only recently that they have been proposed for heat management. The interest in adsorption systems started to increase, firstly due to the oil crisis in the 1970s that lead to...
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