Waste Heat Recovery (notes)

“International Wastewater Heat Exchange Systems Inc. is founded by a team of professionals who have spent the past 20 years exploring sustainability options including geo-exchange, solar and wind. Our endeavours have included projects around the globe, and many projects are internationally recognized. IWHES systems recover and recycle the heat from sewage, the ultimate energy source as we considered, offer our customers the most energy-saving and cost-effective solutions for heating, cooling and domestic hot water for any buildings, residential or commercial.”


Wastewater Heat Recovery On the Rise


Custom Designed Waste Heat Recovery System for Bruichladdich Distillery


“Turboden, a leading company in the production of Organic Rankine Cycle (ORC) turbo-generators for distributed power generation employing renewable sources and waste heat, a group company of Mitsubishi Heavy Industries Ltd. (MHI), implemented the first ORC-based heat recovery plant on an Electric Arc Furnace (EAF) in the world”


Emerging Opportunities: The Growth of Industrial Waste Heat Recovery 


The waste heat recovery market will reach $53.12 billion by 2018.

Europe dominates the market, accounting for a major share of about 38% in 2012. Asia-Pacific will experience highest growth rate of 9.7% in the next five years from 2013-2018. Key regions in Asia-Pacific market are China and India which will experience the highest installations of waste heat recovery systems.


Waste heat recovery system operates at lower temperature

Calnetix claims that its system is unique in that it can pull usable heat from a source with temperatures as low as 80°C, unlike other heat recovery systems that require much higher temperatures – typically engine exhaust gas temperatures. The Hydrocurrent system is said to convert excess waste heat into electric power without affecting engine performance, while still leaving sufficient heat in the jacket water to power a fresh water maker.

It has applied this technology to its WHR system, said be designed specifically for the shipboard environment, and to produce up to 125kW of power for the ship’s electric load from heat recovered out of the engine’s jacket water.




Opcon Powerbox produces electricity from waste water at a temperature range of 50-95°
– An average Opcon Powerbox generates 3 400 MWh of electricity per year
– 3 400 MWh = 340 cubic metres of oil = 2,100 barrels of oil

Alphabet Energy: Thermoelectrics for waste-heat recovery: Introducing E1


 Reduction of electrical consumption by 70% in a non industry small scale hot water tank

The Nexus eWater recycler saves water and energy (Best in Show)


 Next-generation heat exchanger recovers heat from shower drains to preheat water

The first practical waste heat recovery version for home drain heat exchange?


or what about the…

 Power-Pipe Drain Water Heat Recovery (DWHR) System from RenewABILITY Energy.

Is this a clever approach to recapture a significant amount of the heat (40%) that currently goes down the drain with the rest of the hot water?


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