EFFICIENCY OF STATE-DEPENDENT PROPORTIONAL INTEGRAL PLUS OVER PROPORTIONAL INTEGRAL PLUS IN THE CONTROL AIR CONDITIONER WITH FREE COOLING

Abstract

People have always wanted a conducive place with a controlled ventilation to create the needed atmosphere to live in. This article is based on the conditioning of the air with cooling systems and efficient control model and free cooling to make occupants of a closed room more comfortable. The article also focuses on performance optimization to preserve the components which make up the cooling system and also on energy efficiency by reducing the energy consumed by the cooling system. This study uses the Integral of squared error (ISE), Integral of absolute control (IAC), Variance of input signal (VAR) and Energy Efficiency (EE) performance criteria to compare the performance of State-Dependent Proportional Integral Plus to Bilinear Proportional Integral Plus (SDP PIP) control model to Linear Proportional Integral Plus (PIP) control model for efficiency in controlling the air conditioner and damper to allow ambient air at desired temperature into the room for free cooling, in order to reduce the energy expended in the control process to keep the room at the desired temperature. The performance criteria comparison is based on energy consumption minimization and the reduction of wear and tear of control components.