Heating, ventilation, air conditioning, and refrigeration systems and heat exchangers are provided that include multichannel tube configurations designed to reduce refrigerant pressure drop through a heat exchanger manifold. An abutment disc connects to a compression piston rotor and rotates synchronously with the flywheel. A plurality of first and second conductive lines overlies the transparent substrate and cross over each other, thereby defining a plurality of display regions. The processing circuitry is configured to calculate the difference between the first image and the second image to obtain a differential image.