The QNET 2.0 Heating, Ventilation and Air Conditioning (HVAC) Board is ideally suited to teach and demonstrate the fundamentals of climate control. Developed exclusively for NI ELVIS platform and LabVIEW™ software, the system can easily be configured to control the temperature in a chamber using a variety of control methods. Students learn how to:
The QNET 2.0 HVAC Board provides an integrated amplifier and a communication interface with the NI ELVIS II(+), interfaced to a PC or laptop via USB link.
The QNET 2.0 HVAC Board consists of a heating chamber with a heater and a brushless DC fan to transfer the heat to the heating channel. The heater is a PWM voltage-controlled amplifier that generates heat by applying the input voltage to an array of resistors in parallel. Six high accuracy temperature sensors are placed along the heating channel. Additional sensors measure ambient and heating chamber temperatures. The temperature measured inside the chamber is controlled using the heater voltage while the fan is ran at a constant speed. Heat is transferred to the sensors by radiation from the heater and by convection from the air stream. Radiative heat transfer is highly nonlinear and it is therefore difficult to model the system by first principles. Therefore, empirical tuning is used to control the system. This heat transfer plant is very similar to the systems that are used to control wafer temperature in semiconductor manufacturing.
The QNET 2.0 HVAC Board is fitted with a variety of safety measures to ensure proper system configurations. Status LEDs provide feedback to users.
The QNET 2.0 HVAC Board comes with comprehensive digital resources developed by Quanser to enhance teaching controls. These resources save professors’ time, while helping students quickly grasp the capabilities of the board, relate the studied control concepts to applications in real world and understand the exercises performed in lab. The resources include:
Topics covered in the Quanser-developed courseware:
To set up your QNET 2.0 HVAC Board, you need NI ELVIS II(+) Modular Engineering Education Laboratory Platform.