WIT Press


Numerical Simulation Of Transients In Shell And Tube Refrigerant Evaporator

Price

Free (open access)

Paper DOI

10.2495/HT000421

Volume

27

Pages

10

Published

2000

Size

309 kb

Author(s)

B. Pavkovic, I. Vilicic, V. Medica

Abstract

A fully distributed dynamic numerical model of a shell and tube type refrigerant evaporator, suitable for control and design purposes, is presented. A void fraction model is used to account for the slip effect. The solution is achieved by the finite volume method. Original software is developed for the model implementation on computer. The thermal expansion valve model is added to the evaporator model in order to simulate the evaporator's control loop. The spatial variations of pressure, temperature, enthalpy, mass flow rate, density, vapor and liquid velocities, void fraction and heat transfer coefficients are predicted through the time for the evaporator. Results of numerical simulations are presented in a graphical form. Measurements are performed on a 140 kW single stage compression heat pump

Keywords