A DYNAMICAL MODEL ADEQUATE FOR CONTROLLING THE EVAPORATOR OF A HEAT-PUMP

We present a dynamical model for the dry evaporator of a heat pump which is suitable for control purposes. We take into account the expansion valve, the compressor and the condenser to model the evaporator and its surroundings. Our model is of the distributed parameter type and consists of partial differential and algebraic equations. For the solution of discretized equations, Newton iteration with a block-Gauss solution of the linearized systems is applied. Numerical results are presented in graphical form and correspond to simulations of almost all control possibilities.