1. business and industrial
2. energy
3. electricity

RECYCLE ENERGY FROM WASTEWATER
DE-5
Every day, large amounts of energy are used on heating domestic ­water.
­Afterwards, the energy is flushed out with wastewater from showers, ­faucets,
washing machines, dishwashers etc. The hot wastewater contains large
amounts of energy which is lost when the water is flushed down the drain.
As well as having a negative impact on the environment, the heating of
­domestic water is a large expenditure for businesses and institutions.
ENERGY REUSE
DE-5
Defined Energy has developed a concept whereby it is
possible to recycle up to 70% of energy otherwise lost
with the wastewater. Our solution includes a module
making it easy and simple to monitor the consumption and saving on the internet.
The recycled energy from wastewater is used to preheat domestic water, thus requiring less energy for
heating the domestic water. Our solution is ideal for
preheating domestic water in combination with oil,
gas, district heating, geothermal, solar power etc.
DE-5 is a Faroese developed and produced heat exchanger. Defined Energy owns the patent on the heat
exchanger which functionally is comparable to a radiator. The cold domestic water is heated when both the
hot wastewater and the cold water come in proximity
to each other, though without contact, cooling down
the wastewater in the process.
INN
IN
Hot
wastewater
DE-5 is composed of trays each containing five spirals.
The cold domestic water flows through the coils and
the hot wastewater flows on top of the coils in opposite
direction of the domestic water, causing it to heat up.
Wastewater flows from the top down through the trays
to the bottom tray and then further down the drain.
The Domestic water enters the lowest tray and runs
up through the trays to the top tray after which it is fed
into the building. As the hot wastewater migrates down
through the trays, it gets colder because the energy is
(taken out and) used on the cold domestic water which
gets warmer for each tray that it enters.
OUT
Heated
domestic
water
The illustration shows how the
cold domestic water is heated.
DE-5 is composed of trays each
containing five spirals. The cold
domestic water flows through the
coils and the hot wastewater flows
on top of the coils in opposite direction as the domestic water, which
therefore is heated.
IN
Cold
domestic
water
OUT
Chilled wastewater
2/4
CONTROL OF CONSUMPTION AND SAVING
MATERIAL
With DE-5 solution from Defined Energy consumers
have access to all data on consumption and saving
on the internet. With a user name and password, you
can always log on and monitor your consumption. It is
easy to get a good overview of the daily consumption
as well as particular times during the day.
The heat exchanger is made of material with a long
service life. The expected lifetime is 30 years or more.
Materials are environmentally compatible. It is expected that most of materials can be recycled when the
heat exchanger must be replaced. The case is made
of plastic, which thanks to new technology can easily
be recycled. The trays are made from stainless steel
(316L), whose durability is better than stainless steel
and is 100% recyclable. The remaining bits can also
be recycled without major problems. Production is carried out on the Faroe Islands, Sweden and Denmark
by personnel with high technical expertise. The tools
that are used in the production, is specifically designed
for the purpose.
ENVIRONMENT
Each year, 3000 TWh is used for heating water in
Europe which is then flushed out as wastewater. The
cost is EUR 300 billion and CO2 emissions 600 million metric ton. With Defined Energy’s solution implemented in all households, businesses and institutions
the CO2 emissions could be reduced by 420 million
metric ton. It would also mean an annual saving of
EUR 200 billion on heating domestic water.
A swimming pool with 100,000 visitors a year has a
consumption of approx. 200 MWh for heating shower water. This consumption leads to CO2 emission of
60 metric ton per year. With the solution from Defined
Energy consumption would be reduced to only 60
MWh. The annual emission would be reduced by 42
metric ton, from 60 to 18 metric ton.
The illustration shows how the
cold water is heated.
In larger installations, several units can
be merged together into a larger unit.
3/4
INSTALLATION
DE-5 is a passive and simple system. This is an advantage in relation to the installation, operation and
functionality. The images illustrates how the heat exchanger is to be connected to the drain pipes from the
showers. The number of units connected depends on
the amount of wastewater flow in order to obtain the
highest efficiency.
ADVICE
Personal guidance and counselling are key elements
in our customer service. Our highly-qualified employees with extensive experience enable us to provide
our customers with service on a high professional
­level. Together with our customers, we find the best
solution to meet their current need for reducing ­energy
consumption.
IT PAYS OFF
Many energy solutions are not very economical. This is
primarily due to a high cost, which first provide ­returns
after many years. With our concept we project a fiveyear return on the investment. With our built-in cleaning system there is very little maintenance and ­Defined
Energy offers full service for a small annual fee.
CASE
SWIMMING HALL IN TÓRSHAVN
Four DE-5 heat exchangers are installed in
the Faroe islands main swimming pool, which
has about 165,000 visitors annually. The annual energy consumption in 2013 for heating the shower water was 327 MWh. This
corresponds to a CO2 emission of 110 tons.
Measure­ments with DE-5 heat exchanger
system so far shows an annual energy reduction v+vof 250 MWh. This corresponds to a
reduction in CO2 of 79 metric ton.
WHO CAN USE THE DE-5?
All companies, organizations and others who have
high consumptions of hot water can choose the DE-5
solution from Defined Energy.
DE-5 SPECIFICATIONS
Dimensions: diameter 1.10m x 1.60m height standard
Capacitate flow per unit: 30 - 70 l / Min
Pipe dimensions: Adapted customer needs.
Pressure Tested: Max pressure 1 MPa (10 bar)
!
MORE INFO ON DE-5
If you would like to know more about our services and company
please feel free to visit our website www.definedenergy.com
You are also welcome to contact us at tel. +45 31363642 or
send an email to: info@definedenergy.com
Bymidten 80 / 3500 Værløse / Denmark
Phone: +(45) 31363642 / info@definedenergy.com / www.definedenergy.com