Scanship, based in Norway, produces advanced wastewater purification and waste management systems for ferries, cruise ships, disaster relief and merchant shipping, as well as land-based waste management systems. The company is a cruise industry leader in advanced wastewater purification, and every second cruise ship delivered to the market in the period between 2014 and 2020 is equipped with Scanship Advanced Wastewater Purification (AWP). Scanship AWP has been and will be installed on 42 of total 75 newbuilds during this 7-year period.
In DryFiciency, Scanship has developed an innovative dryer that can work with both SHS (Superheated Steam Drying) as well as with MVR technology (Mechanical Vapour Recompression Technology) system.
The main benefit of this MVR dryer lies in its design for large temperature differences enabling it to recover and upgrade usable process heat without increasing the dryers‘ CO2 footprint. Supply temperatures of up to 150oC for steam drying processes were achieved. Furthermore, the SEC (Specific Energy Consumption) was reduced significantly making the process carbon-neutral depending on the electricity mix of the production site.
DESCRIPTION OF THE OPEN LOOP DEMONSTRATION:
Scanship demonstrates the MVR system (open loop) developed within DryFiciency in a land-based waste management system at Lindum A/S in Drammen (Norway) for bio-sludge drying. The demonstration unit utilizes steam up to 1 ton per hour which results in a capacity of up to 500 kW.
The turbo-compressors by Rotrex A/S , a Danish technology driven SME, are oil-free and therefore without lubrication. The demo case aims at reducing the dryer’s energy demand by up to 75% and at eliminating the need of the drying system to depend on fossil fuels. Water is a natural refrigerant. As it is non-toxic, reliable, environmentally-safe, and does not have a global warming potential, it will not be subject to future regulations.
Scanship will add a huge potential for this technology to the cruise industry, in land-based waste management, in the biogas market as well as in fish farming industry.
The Norwegian demonstrator shows improvements in the efficiency and capacity of the dryer of almost 100 percent while reducing energy consumption by 70 percent. Normally using use some 900,000 kWh worth of heat to evaporate 1 ton of water the DryFiciency heat pump reduces this to down to 300,000 kWh making this a highly sustainable and economically viable process.
See the DryFiciency heat pump demonstrator in action here: