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NotionCommotion
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A venture airvalve is a mechanical device which for a given valve position results in a constant flow independent of inlet pressure (within a given range). If pressure increases, flow increases resulting in a low pressure in the throat of the venture which sucks the plunger in thereby reducing flow. The plunger is held out by a spring.
There is a given required minimum differential pressure across the valve. For a constant airflow and constant pressure drop, there has to be a loss of energy from the airflow, no? I assumed this loss of energy was transferred as either noise or sound energy.
I asked my co-worker, and he indicated that this wasn't the case. He indicated that the energy drop is being used to perform work on the spring. But I recall work being equal to force x distance, and as distance is zero, how could there be any work?
He explained it as if you compressed a spring with your fingers (or used a motor to hold the compressed spring in a given position), you are expending energy to hold it in that position.
Questions.
What is happening to the lost energy in the airflow?
Is that energy being applied to the spring as work?
Thank you
There is a given required minimum differential pressure across the valve. For a constant airflow and constant pressure drop, there has to be a loss of energy from the airflow, no? I assumed this loss of energy was transferred as either noise or sound energy.
I asked my co-worker, and he indicated that this wasn't the case. He indicated that the energy drop is being used to perform work on the spring. But I recall work being equal to force x distance, and as distance is zero, how could there be any work?
He explained it as if you compressed a spring with your fingers (or used a motor to hold the compressed spring in a given position), you are expending energy to hold it in that position.
Questions.
What is happening to the lost energy in the airflow?
Is that energy being applied to the spring as work?
Thank you