Plate heat exchanger (PHE) is a type of heat exchanger that uses metal plates sealed with gaskets to transfer heat between a hot fluid with a cold fluid. It consists of a frame, which consists of a front cover, rear (movable) parts, carrying bar, guiding bar, and a number of tie bolts depending on the type of the plate heat exchanger.
The heat is transferred from one medium to another through plates, which have been pressed. The hot and cold medium flows through between each of the plate and then they exchange their heat without mixing each other. Liquid flowing through the PHE channels experience turbulent flow at low velocities producing high heat transfer efficiency and low fouling which results in smaller and a compact unit. A PHE has wide industrial applications especially in HVAC, oil and gas, power generation, edible oil etc.