Work

Design and Experimental Evaluation of a Controller for a Direct-Expansion Solar-Assisted Heat Pump with Propane

Year: 2025

Type: article

Abstract: Given the growing demand for sustainable energy solutions, this study addresses the challenge of improving the efficiency and environmental performance of residential water heating systems. This work presents the design and implementation of a controller aimed at regulating the outlet water temperature of a direct-expansion solar-assisted heat pump operating with propane. A dynamic model was experimentally identified using the AutoRegressive with eXogenous input methodology and used to design a Proportional–Integral–Derivative controller via the direct synthesis method. To regulate the outlet water temperature, the controller acts on the water flow rate. The effectiveness of the controller was evaluated through computer simulations and experimental tests. Its robustness was assessed by considering parametric variations of ±15%, during which the system maintained stability and performance. The controller demonstrated good accuracy and performance, keeping the desired temperature stable even in the presence of disturbances, both in simulations and experimental evaluations.

Source: Processes

DOI: 10.3390/pr13113583

Authors: Sara Isabel de Melo Resende, Hélio Augusto Goulart Diniz, Ralney Nogueira de Faria, Raphael Nunes de Oliveira

Institutions: Universidade Federal de Minas Gerais, Universidade do Estado de Minas Gerais, Estácio (Brazil), Federal Center for Technological Education of Minas Gerais

Language: English

Topic: Refrigeration and Air Conditioning Technologies

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,896