THERMAL ERRORS IN METERING PUMPS Academic Article uri icon

abstract

  • The mass flow rate produced by a liquid metering pump is shown to be affected by both the temperature of the liquid and the temperature/time derivative. Equations are derived for errors in the mass flow rate of the liquid when the surrounding or ambient fluid is (1) at a steady-state temperature, (2) in a transient mode, or (3) in a periodic mode. While the familiar steady-state errors seldom exceed 0.55%, the previously ignored unsteady-state contributions can amount to several percent or more for either the transient or periodic mode, as indicated by numerical examples. The equations presented allow the user to estimate accurately (1) the thermal errors associated with his pump and, if unacceptable, (2) the thermostat specifications required to decrease these errors to an acceptable level. 1985, American Chemical Society. All rights reserved.

published proceedings

  • INDUSTRIAL & ENGINEERING CHEMISTRY FUNDAMENTALS

author list (cited authors)

  • EUBANK, P. T., JOHNSON, M. G., HOISTE, J. C., & HALL, K. R.

citation count

  • 2

complete list of authors

  • EUBANK, PT||JOHNSON, MG||HOISTE, JC||HALL, KR

publication date

  • January 1985