Techno-economic assessment of boiler feed water production by membrane distillation with reuse of thermal waste energy from cooling water
van Leerdam, R.C.
van Medevoort, J.
van Tongeren, W.G.J.M.
The European KIC-Climate project Water and Energy for Climate Change (WE4CC) aims at the technical demonstration, business case evaluation and implementation of new value chains for the production of high-quality water using low-grade thermal waste energy from cooling water. A typical large-scale waste heat water network is the production of the boiler feed water from surface water using waste heat of temperatures below 60°C from power plants. Two innovative membrane distillation concepts for the production of high-quality water were evaluated for this case in terms of operational conditions, equipment size and costs which are dependent on the available amount of waste heat and its temperature. • Memstill® (partial use of waste heat, by partially cooling down cooling water such that the remaining heat can be reused for other applications, e.g. for the recovery of desiccant solutions) • MD-HEX, i.e. membrane distillation with an extra integrated heat envelope within the Memstill® module for full use of waste heat which is taken up by the produced water and/or the concentrate. Both Memstill® and MD-HEX behave as a demineralised water (demi-water) producing once-through cooler. Due to the utilisation of waste heat, much less electricity is needed for the production of demi-water relative to other water production technologies. Memstill® also behaves as a waste heat-consuming demi-water producing technology. Thus, significant reductions in cooling water intake, costs and GHG emissions can be achieved. © 2014 Balaban Desalination Publications. All rights reserved.
Earth / Environmental
To reference this document use:
WT - Water Treatment
ELSS - Earth, Life and Social Sciences
Geological Survey Netherlands
Energy / Geological Survey Netherlands
Boiler feed water
Heat water networks
Desalination and Water Treatment, 55 (13), 3506-3518