R82 Energy Refurbishment

SUSTAINABLE ENERGY

MINI PROJECT

David Canosa Vaamonde

Jose Miguel Salgado Perez

Martin Amado Pousa

Pedro Rico Lopez

R82 ENERGY

REFURBISHMENT

INTRODUCTION

SUSTAINABLE ENERGY

Parking

Location (Gedved).

Building 2 Building 1

R82 Buildings

SUSTAINABLE ENERGY

SUSTAINABLE ENERGY

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.

What’s this project about?

Heating solution.

Heat recovery system.

Heat pumps.

Electrical solution.

PV solar panels.

MAIN REPORT

SUSTAINABLE ENERGY

Heating solution.

SUSTAINABLE ENERGY

Building 1

Area3792 m2

Heating

demand558 MWh/a

Airflow5694 l/s

6,79 kg/s

Building 2

Area2476 m2

Heatingdemand

360 MWh/a

Airflow3667 l/s

4,37 kg/s

SUSTAINABLE ENERGY

Heat recovery

Heat pumps sytem

Water heat accumulator

Building 1

Gas boiler

SUSTAINABLE ENERGY

Building 1

Heat exchanger into the

ventilation unit on the roof

5694,4 l/s

20ºC1,013 bar

h = 34,81 kJ/kg

H = 270 kW

SUSTAINABLE ENERGY

Building 1

5694,4 l/s

20 ºC1,013 bar

h1 = 34,81 kJ/kg

5694,4 l/s

10,9 ºC1,028 bar

h2 = 18,47 kJ/kg

Heat recovery systemqm = 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)

Heat losses 20 %

SUSTAINABLE ENERGY

Building 1

Heat Pump water-water

Evapopator

P = 29,6 kW

Condenser

P = 42 kW

COP = 3,39

Expansion valve

Compressor

P = 12,4 kW

From the heat exchangerFrom the water storage

To the heat exchanger

To the water storage

SUSTAINABLE ENERGY

Heat recovery (207 MWh/a)

Heat pumps sytem (295 MWh/a)

Total heating demand (558 MWk/a)

Reduction of gas consumption = 52 %

Energy saving = 37 %

Building 1

SUSTAINABLE ENERGY

Building 2

Heat exchanger into the

ventilation unit on the roof

3666,5 l/s

20ºC1,013 bar

h = 34,81 kJ/kg

H = 152 kW

SUSTAINABLE ENERGY

Building 2

3666,5 l/s

20 ºC1,013 bar

h1 = 34,81 kJ/kg

3666,5 l/s

10,9 ºC1,028 bar

h2 = 18,47 kJ/kg

Heat recovery systemqm = 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)

Heat losses 20 %

SUSTAINABLE ENERGY

Building 2

Heat Pump water-water

Evapopator

P = 28,6 kW

Condenser

P = 42 kW

COP = 3,13

Expansion valve

Compressor

P = 13,4 kW

From the heat exchangerFrom the water storage

To the heat exchanger

To the water storage

SUSTAINABLE ENERGY

Heating solution. Heat pumps sytem (197 MWh/a)

Heat recovery (134 MWh/a)

Total heating demand (360 MWk/a)

Reduction of gas consumption = 55 %

Energy saving = 37 %

Building 2

SUSTAINABLE ENERGY

Heat pump financial analysis

The gas consumption will

be reduced to a 52 %.

Life span 25 years

Investment 1.110.000,00 DKK

Savings

generated/a179.652,33 DKK

Savings

increasing2,10% per year

Subsidydiscount in fossil

fuel taxes

Total savings 6.113.275,56 DKK

Simple

payback5,83 years

Electricity consumption solution.

PV solar panels.

SUSTAINABLE ENERGY

72 parking spaces. 288 solar panels.

SUSTAINABLE ENERGY

Photo-Voltaic Solar Systems.

Solar panel.

SUSTAINABLE ENERGY

Technical information about solar panels

Nominal Power 437 w

Efficiency 20,1%

Technology Crystaline Silicon

Cell per panel 128

Area 2m2

Weight 28,6kg

Temperature operation -40o/+85o

SUSTAINABLE ENERGY

Power energy calculation.

SUSTAINABLE ENERGY

Power energy calculation (results)

SUSTAINABLE ENERGY

PV cells financial analysis

The electricity consumption

will be reduced to a 30%.

Life span 25 years

Investment 864.000,00 DKK

Savings


Savings

increasing6% per year

Subsidy in

electricity price

-14% - 10 first years

-43% - 10 next years


Simple

payback7,73 years

SUSTAINABLE ENERGY

CONCLUSIONS

Reduction:

30% Electricity

52% Gas

42% CO2 emissions

42% CO2 Reduction = 49000 Trees = 400000 m2 of forest

Life span 25 years

Investment 1.974.000,00 DKK

Savings


Savings

increasing4,5% per year

Subsidy4% of total

savings


Simple

payback6,20 years

SUSTAINABLE ENERGY

tons

50 tons

100 tons

150 tons

200 tons

250 tons

300 tons

350 tons

kr. -

kr. 100.000

kr. 200.000

kr. 300.000

kr. 400.000

kr. 500.000

kr. 600.000

kr. 700.000

kr. 800.000

2010 2011 2012 Future

CO2 emissions Electricity Gas

CONSUMPTION EVOLUTION

SUSTAINABLE ENERGY

Programs used for do the calculations

and design

Be

10

THANK YOU FOR YOUR

ATTENTION!!

SUSTAINABLE ENERGY

SEE YOU IN

A GREENER WORLD!!

R82 Energy Refurbishment

Design

Transcript of R82 Energy Refurbishment