Thermoelectric climate control systems for agro-industrial facilities with non-linear control of Peltier modules

Abstract

A promising direction in solving the problem of energy saving at agribusiness facilities is the use of an integrated approach - the principle of trigeneration, in which thermal energy is generated based on the thermoelectric method, which involves the use of special modules from thermoelements based on the Peltier effect. On the basis of this method, a climate control system for agro-industrial complex objects has been developed, represented by a block diagram and an equivalent functional model. To assess its compliance with a certain quality of the control process during the transition of the system to a new operating mode, a comparative analysis of the use of linear and nonlinear control algorithms for thermoelectric modules was carried out. In this case, the nonlinearities were set by two saturation links corresponding to the Saturation blocks in the MatLAB Simulink environment. With the help of the developed models, a study was made of the operation of the proposed climate control system in the time domain for the studied control modes of thermoelectric modules at different values of saturation blocks, according to the results of which it was found that the use of nonlinear control can reduce the time of transients, dynamic control error and oscillation, which unattainable using traditional linear algorithms.