Method and apparatus for indicating pump efficiency
First Claim
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1. An apparatus for determining the degree of wear in a pump having an outlet line, comprising:
- a first temperature sensor adapted to produce a reference temperature signal;
a second temperature sensor connected to the outlet line, said second temperature sensor being adapted to produce an outlet temperature signal; and
means for determining whether the pump is in a predefined operating state responsive to a said temperature signal,calculating a temperature difference between said reference and outlet temperature signals in response to the pump being in said predefined operating state andindicating a fault in response to said difference exceeding a fault level.
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Abstract
An apparatus for indicating efficiency losses in a pump is provided. The apparatus includes a temperature sensor located at the pump input, a second temperature sensor located at a second location, a fluid flow sensor located at the second location, a processor for producing a difference signal in response to signals from the first and second temperature sensors and for quantifying efficiency losses of the pump in response to the difference signal and a signal from the fluid flow sensor. A fault indicator is also provided that is responsive to the efficiency losses.
55 Citations
18 Claims
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1. An apparatus for determining the degree of wear in a pump having an outlet line, comprising:
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a first temperature sensor adapted to produce a reference temperature signal; a second temperature sensor connected to the outlet line, said second temperature sensor being adapted to produce an outlet temperature signal; and means for determining whether the pump is in a predefined operating state responsive to a said temperature signal, calculating a temperature difference between said reference and outlet temperature signals in response to the pump being in said predefined operating state and indicating a fault in response to said difference exceeding a fault level. - View Dependent Claims (2, 3, 4)
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5. An apparatus for determining the energy loss in a pump, comprising:
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means for measuring a temperature indicative of the input temperature of a pumped fluid and producing a first temperature signal; means for measuring the fluid temperature at a second location and producing a second temperature signal; means for producing a flow signal indicative of the amount of fluid flow at said second location; processing means for calculating a difference between said first and second temperature signals when the pump is in a predefined operating state, said processing means quantifying efficiency losses of the pump from said difference and said flow signal and indicating a fault in response to said efficiency losses exceeding a predetermined level. - View Dependent Claims (6, 7, 8, 9)
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10. An apparatus for determining the energy loss in a pump, comprising:
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means for measuring the input temperature of a pumped fluid and producing a first temperature signal; means for measuring the fluid temperature at a second location and producing a second temperature signal; means for producing a flow signal indicative of the amount of fluid flow at said second location; and processing means for producing a difference signal representative of a temperature difference between said first and second temperature signals, producing a loss signal in response to said difference signal and said flow signal, said loss signal quantifying pump efficiency losses, calculating the rate of change of said loss signal and indicating a fault in response to the level and rate of change of said loss signal. - View Dependent Claims (11, 12, 13)
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14. A method for determining energy loss in a pump, comprising the steps of:
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measuring the input temperature of a pumped fluid and producing a first temperature signal; measuring a fluid temperature at a second location and producing a second temperature signal; determining the amount of fluid flow at said second location in response to a signal indicative of fluid flow rate; determining from a said temperature signal whether the pump is in a predefined operating state; and producing a difference signal representing a temperature difference between said first and second temperature signals and quantifying efficiency losses of the pump using said difference signal and said flow signal, in response to the pump being in said predefined operating state. - View Dependent Claims (15, 16, 17, 18)
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Specification