"R82 Energy Refurbishment" is a project idea which tries to save money, energy and lead the company to a greener view. The project is a combination of a heat recovery system attached to the ventilation and a PV parking. With the heat recovery system we can extract energy from the air to use it again on the building reducing the energy consumption.

1. R82 ENERGY
REFURBISHMENT
David Canosa Vaamonde
Jose Miguel Salgado Perez
Martin Amado Pousa
Pedro Rico Lopez
SUSTAINABLE ENERGY
MINI PROJECT

2. SUSTAINABLE ENERGY
INTRODUCTION
 Location
Parking
(Gedved).

3. SUSTAINABLE ENERGY
 R82 Buildings

Building 2

Building 1

4. SUSTAINABLE ENERGY
 What’s
this project about?
 The purpose of the project is to reduce the energy
consumption of R82 company buildings.
 We have designed a heat recovery system
connected to water-water heat pumps. These heat
pumps supply energy to the heating system reducing
the gas consumption.
 As well, we have designed a PV cells plan projecting
a steal construction to cover the outside parking.
 We would like to know how far the renewable energy
systems can save sources and money and in how
many time could be the investment depreciated.

5. SUSTAINABLE ENERGY
MAIN REPORT
 Heating
solution.
 Heat recovery system.
 Heat pumps.
 Electrical
solution.
 PV solar panels.

6. SUSTAINABLE ENERGY
 Heating solution.
Building 1
Area
3792 m2
Building 2
Area
2476 m2
Heating
demand
558 MWh/a
Heating
demand
360 MWh/a
Airflow
5694 l/s
6,79 kg/s
Airflow
3667 l/s
4,37 kg/s

7. SUSTAINABLE ENERGY
 Building 1
Heat pumps sytem
Heat recovery
Water heat accumulator
Gas boiler

8. SUSTAINABLE ENERGY
 Building 1
Heat exchanger into the
ventilation unit on the roof
5694,4 l/s
20ºC
1,013 bar
h = 34,81 kJ/kg
H = 270 kW

9. SUSTAINABLE ENERGY
 Building 1
5694,4 l/s
10,9 ºC
1,028 bar
h2 = 18,47 kJ/kg
5694,4 l/s
20 ºC
1,013 bar
h1 = 34,81 kJ/kg
Heat losses 20 %
Heat recovery system
qm = 6,79 kg/s
HAIR = 111 kW
HAIR,recovery = 88,8 kW
We recover the 33 % of the enthalpy into
the extract air (free energy)

10. SUSTAINABLE ENERGY
 Building 1
COP = 3,39
Heat Pump water-water
From the heat exchanger
From the water storage
Compressor
P = 12,4 kW
Condenser
P = 42 kW
Evapopator
P = 29,6 kW
To the heat exchanger
To the water storage
Expansion valve

11. SUSTAINABLE ENERGY
 Building 1
Heat pumps sytem (295 MWh/a)
Reduction of gas consumption = 52 %
Heat recovery (207 MWh/a)
Energy saving = 37 %
Total heating demand (558 MWk/a)

12. SUSTAINABLE ENERGY
 Building 2
Heat exchanger into the
ventilation unit on the roof
3666,5 l/s
20ºC
1,013 bar
h = 34,81 kJ/kg
H = 152 kW

13. SUSTAINABLE ENERGY
 Building 2
3666,5 l/s
10,9 ºC
1,028 bar
h2 = 18,47 kJ/kg
3666,5 l/s
20 ºC
1,013 bar
h1 = 34,81 kJ/kg
Heat losses 20 %
Heat recovery system
qm = 4,37 kg/s
HAIR = 71,5 kW
HAIR,recovery = 57,2 kW
We recover the 37,6 % of the enthalpy
into the extract air (free energy)

14. SUSTAINABLE ENERGY

Building 2
COP = 3,13
Heat Pump water-water
From the heat exchanger
From the water storage
Compressor
P = 13,4 kW
Condenser
P = 42 kW
Evapopator
P = 28,6 kW
To the heat exchanger
To the water storage
Expansion valve

15. SUSTAINABLE ENERGY
 Heating
solution.
 Building 2
Heat pumps sytem (197 MWh/a)
Reduction of gas consumption = 55 %
Heat recovery (134 MWh/a)
Energy saving = 37 %
Total heating demand (360 MWk/a)

16. SUSTAINABLE ENERGY
 Heat pump financial analysis
Life span
25 years
Investment
1.110.000,00 DKK
Savings
generated/a
179.652,33 DKK
Savings
increasing
2,10% per year
Subsidy
discount in fossil
fuel taxes
Total savings
6.113.275,56 DKK
Simple
payback
5,83 years
The gas consumption will
be reduced to a 52 %.

17. SUSTAINABLE ENERGY
 Electricity
consumption solution.
 PV solar panels.

18. SUSTAINABLE ENERGY

Photo-Voltaic Solar Systems.
 72 parking spaces.  288 solar panels.

19. SUSTAINABLE ENERGY

Technical information about solar panels

Solar panel.
Nominal Power
437 w
Efficiency
20,1%
Technology
Crystaline Silicon
Cell per panel
128
Area
2m2
Weight
28,6kg
Temperature operation
-40o/+85o

20. SUSTAINABLE ENERGY

Power energy calculation.

21. SUSTAINABLE ENERGY

Power energy calculation (results)

22. SUSTAINABLE ENERGY
 PV cells financial analysis
Life span
25 years
Investment
864.000,00 DKK
Savings
generated/a
97.567,00 DKK
Savings
increasing
6% per year
Subsidy in
electricity price
-14% - 10 first years
-43% - 10 next years
Total savings
5.846.033,07 DKK
Simple
payback
7,73 years
The electricity consumption
will be reduced to a 30%.

23. SUSTAINABLE ENERGY
CONCLUSIONS
Life span
25 years
Investment
1.974.000,00 DKK
Reduction:
Savings
generated/a
289.545,78 DKK
30% Electricity
Savings
increasing
4,5% per year
Subsidy
4% of total
savings
Total savings
11.959.308,63 DKK
Simple
payback
6,20 years
52% Gas
42% CO2 emissions
42% CO2 Reduction = 49000 Trees = 400000 m2 of forest

24. SUSTAINABLE ENERGY

CONSUMPTION EVOLUTION
kr. 800.000
350 tons
kr. 700.000
300 tons
kr. 600.000
250 tons
kr. 500.000
200 tons
kr. 400.000
150 tons
kr. 300.000
100 tons
kr. 200.000
50 tons
kr. 100.000
kr. -
tons
2010
2011
CO2 emissions
2012
Electricity
Future
Gas

25. SUSTAINABLE ENERGY

Programs used for do the calculations
and design
Be
10

26. SUSTAINABLE ENERGY
THANK YOU FOR YOUR
ATTENTION!!
SEE YOU IN
A GREENER WORLD!!