Pumps & Mechanical
Choosing A Pump
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Centrifugal Pump Analysis
Introduction
Centrifugal pumps are used to increase pressure in a liquid for the purpose of transporting the liquid through piping and other devices for use in an industrial process. With the higher pressure, the liquid can be transported in short or long pipelines for delivery to an ultimate destination. Examples include water pipelines, refined petroleum and crude oil pipelines.
The pressure generated by the pump is gradually depleted as the liquid flows through the pipeline, due to friction in the pipe, as well as any elevation increase from the point of origin to the destination point. The liquid as it enters the pump has a certain amount of energy, due to its initial pressure (pressure energy), position (potential energy) and its velocity (kinetic energy). The potential energy depends on the location of the liquid from some datum, such as sea level. The kinetic energy is due to the motion of the liquid. The sum of three components is the total energy of the liquid. As the liquid comes out of the pump, energy is imparted by the rotating element (impeller) in the pump and the liquid pressure increases. The velocity of the liquid also changes from that at the pump inlet. In a centrifugal pump, the liquid is accelerated by centrifugal force during its passage through the rotating pump impeller and, finally at the exit, the kinetic energy is converted to pressure energy as it exits the pump volute into the discharge piping.
Centrifugal Pump Analysis
Introduction
Centrifugal pumps are used to increase pressure in a liquid for the purpose of transporting the liquid through piping and other devices for use in an industrial process. With the higher pressure, the liquid can be transported in short or long pipelines for delivery to an ultimate destination. Examples include water pipelines, refined petroleum and crude oil pipelines.
The pressure generated by the pump is gradually depleted as the liquid flows through the pipeline, due to friction in the pipe, as well as any elevation increase from the point of origin to the destination point. The liquid as it enters the pump has a certain amount of energy, due to its initial pressure (pressure energy), position (potential energy) and its velocity (kinetic energy). The potential energy depends on the location of the liquid from some datum, such as sea level. The kinetic energy is due to the motion of the liquid. The sum of three components is the total energy of the liquid. As the liquid comes out of the pump, energy is imparted by the rotating element (impeller) in the pump and the liquid pressure increases. The velocity of the liquid also changes from that at the pump inlet. In a centrifugal pump, the liquid is accelerated by centrifugal force during its passage through the rotating pump impeller and, finally at the exit, the kinetic energy is converted to pressure energy as it exits the pump volute into the discharge piping.
Chapter10. Compressors
Main Types of Compressors
The compressor is the heart of a mechanical refrigeration system.
There is the need for many types of compressors because of the variety of refrigerants and the capacity, location and application of the systems.
Generally, the compressor can be classified into two basic types: positive displacement and roto-dynamic.
Chapter10. Compressors
Main Types of Compressors
The compressor is the heart of a mechanical refrigeration system.
There is the need for many types of compressors because of the variety of refrigerants and the capacity, location and application of the systems.
Generally, the compressor can be classified into two basic types: positive displacement and roto-dynamic.
Fire Pump Systems Design and Specification
Think your fire pumps are just like the rest of your fluid movers? Think again. Rigorous standards and certifications make sure these life-savers are up to snuff
Fire Pump Systems Design and Specification
Think your fire pumps are just like the rest of your fluid movers? Think again. Rigorous standards and certifications make sure these life-savers are up to snuff
Centrifugal Pump Training
Objectives
Understand pump fundamentals
Understand the probable root causes of degradation or failure associated with various pump problems
Understand the state-of-the-art technologies to upgrade existing designs to achieve improved operation and life
Learn how to determine where a pump is operating and how to modify its performance to achieve optimum performance
Centrifugal Pump Training
Objectives
Understand pump fundamentals
Understand the probable root causes of degradation or failure associated with various pump problems
Understand the state-of-the-art technologies to upgrade existing designs to achieve improved operation and life
Learn how to determine where a pump is operating and how to modify its performance to achieve optimum performance
Chapter One Classification Of Pumps
What Is a Pump?
A pump is a machine or device for raising, transferring, or compressing fluids. Pumps represent the largest single use of power in the industry (31%) by motor-driven equipment. Process variables, including pressure and flow of gases and liquids, have long been regulated using mechanical clutches, throttles, and adjustable inlet guide vanes. Pumps often operate as a variable torque load, a load that increases as the speed increases. These mechanisms waste energy, require frequent maintenance, and provide inaccurate control.
Chapter One Classification Of Pumps
What Is a Pump?
A pump is a machine or device for raising, transferring, or compressing fluids. Pumps represent the largest single use of power in the industry (31%) by motor-driven equipment. Process variables, including pressure and flow of gases and liquids, have long been regulated using mechanical clutches, throttles, and adjustable inlet guide vanes. Pumps often operate as a variable torque load, a load that increases as the speed increases. These mechanisms waste energy, require frequent maintenance, and provide inaccurate control.
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