Hello mechanical engineers, We (Potters Without Borders) are seeking assistance to size ducting and fans, and design a simple chimney heat recovery system for a series of commercial sized dehydration kilns which will be put into use in Haiti at a factory manufacturing ceramic pot water filters (google it!) -The dehydrators will be built from repurposed 1/2 length shipping containers (roughly 8x8x20ft) -The heat exchanger could be mounted above the kiln ventury leading to the base of a shared chimney (2 kilns), there is an area of roughly 2ftx3ft where the temp will be about 500-600 deg.C -Each container will hold 200 filters which will need to loose about 600kg of water over three days or so. -ambient temp there is about 20-30deg C at roughly 50%-80% humidity (obviously variable but aiming to dry wares during the rainy season) -ideal maximum drying temp is 100degC, but there will be three containers in series, each one further from the heat exchanger. The wettest filters will emter the system in the container the furthest away from the exchanger. The exchanger the furthest away will be the coolest. -The kiln will be run on a two day cycle, one day firing, one day of cooling. The dehydrators do not need to be heated for the entire time, but air exchange would be happening constantly. -What other data is needed? (schematic to follow) a) What size of motor , and what size of fan are we looking at? (+ sourcing) b) What size of ducting will be needed throughout the system? c) What kinds of sensors will we need (+ sourcing) d) Any original designs for manual valves and the heat exchanger? Kai.