(253d) Exploring the Power of Desk-Scale Experiments for Enhanced Understanding of Flow Characteristic Curves

This work presents an innovative approach to studying flow characteristic curves (CUR) through desk-scale experiments, aiming to enrich student learning objectives and diversify traditional chemical engineering laboratory structures. The main goal is to assess the effectiveness of desk-scale experimental kits in enhancing large-scale experiments in unit operations laboratories, particularly for remote learning modalities. The study seeks to address this question: “How learning objectives and pedagogical approaches can be improved to facilitate students’ comprehension of key fluid mechanics concepts via CUR desk-scale experiments?

The CUR desk-scale module comprises aquarium pumps, feed tanks, valves, 3D-printed pressure taps, and other elements connected by flexible tubing. A differential pressure sensor connected to an Arduino microprocessor quantifies pressure drop across pumps and valves, which is used to construct characteristic curves for various types of pumps, valves, and pump arrays. The primary learning objectives focus on reinforcing fluid mechanics topics not fully covered in lecture courses, via experimentation within the Unit Operations 1 laboratory course at the University of Florida.

Student-collected experimental results demonstrate that desk-scale CUR experiments effectively replicate larger-scale pump and valve behaviors, aiding in understanding challenging concepts such as predictive system curves, net positive suction head, and the additive nature of pressure head and flow rate in pump arrays. Notably, this enhanced understanding was achieved with only minor adjustments in the configuration of the small experimental setup. These findings highlight the pedagogical value of desk-scale experiments, emphasizing their simplicity and accessibility in teaching chemical engineering principles.

This study demonstrates that CUR desk-scale experiments play a pivotal role in chemical engineering laboratories, offering invaluable learning opportunities. Their integration into remote learning modalities should be guided by positive student feedback, underscoring their significance in enhancing engagement and comprehension of fluid mechanics topics. The use of interactive elements along with clear instructions mitigate technical challenges has been identified by students and must be addressed. In-person pilot-scale experiments further enrich learning by offering access to industry-standard equipment and hands-on guidance. This blend fosters collaboration, responsibility, and mastery of experimental procedures, thus contributing significantly to educational transformation in chemical engineering laboratories.