The Spiral Heat Exchanger Trainer demonstrates heat exchange between two fluids flowing in a spiral path. It is designed to study efficiency and performance of compact heat exchangers under co-current and counter-current flow. The unit includes temperature sensors, flow meters, and digital indicators for data recording. Students can analyze heat-transfer coefficients and pressure drops. Built for engineering colleges, polytechnics, and ITIs, it is compact, durable, and ideal for hands-on heat-transfer training.