Rotary recuperator statics: natural research and identification

Abstract

An experiment on rotary recuperators of ventilation units in the cold season and subsequent identification of the model of recuperator statics is described. The research was carried out on recuperators manufactured by REMAK model XPXR. The scheme of ventilation installation with a rotary recuperator is described. The current state of recuperator control automation is described – according to PI and PID control law without searching for optimal static modes. The scheme of carrying out experiment for the purpose of finding of the static characteristic of a recuperator is developed. Four sets of experimental data on three ventilation units whose technical parameters differ are presented (on one of the units the experiment was conducted twice).The exponential structure of the approximation is chosen. The parameters of the model by the grid method were found for the conditions under which the experiments were performed. Comparison of the model and experiments showed good accuracy - the average absolute deviation for each set of experimental data is in the range of 0.0662-0.126 °C. The conclusion about the adequacy of the model and the possibility of its further application is made. The disadvantage of the model is the parameter that requires adaptation depending on external conditions and installation, but it is included in the model linearly, so such adaptation is quickly implemented in obvious ways in real time. The obtained model will be used to develop an algorithm for finding the optimal modes of operation of rotary recuperators in order to save electricity and heat.