LCC – LIFE CYCLE COST CALCULATION FOR AHU’s · PDF file09.04.2014 Birger Golke,...

09.04.2014 Birger Golke, Chairman AL-KO Air Treatment Vietnam LLC 1

LCC – LIFE CYCLE COST CALCULATION FOR AHU’s

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• Introduction

•Construction costs

•Operation costs

•Sample of Life Cycle cost calculation

•Conclusion

Abstract

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LCC – Introduction

Costs during the Life Cycle

PlanningInstallation and

CommissioningOperation

Optimization

Refitting

Refurbishment

Decommissioning Disposal

Period under

consideration

5 10 15

20 % of total costs 80 % of total costs are mostly neglected

Planning and Construction Operation Disposal

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Reasons for usage of high energy efficient air

handling units

Ecological:

• Shortage of fossil energy sources

• Reduction of Co2 emission � global warming –Kyoto Protocol

Economical:

• To save energy means lower costs and thus higher competitiveness and

higher turnovers

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Construction Costs - 20% of Life Cycle



Optimization

Refitting

Refurbishment


Period under

consideration

5 10 15



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LCC – Construction costs

Sample calculation of an common office buildingBasis

Size :15.000 m² on 12 storey

Technical Concept

Chiller: Using compact chiller for serving ahu‘s and fcu‘s

Ahu: Is serving fresh outside-air 4m³/hm² (6 ahu a‘10.000m³/h)

Fcu: Is serving the additional chilling demand

Climate Conditions

SEA Climate Conditions with 38°C and 85% r.h. maximum

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Schematic of the technical system

- Electric System

- Chilling System

- Air supply System

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Schematic of a common Air Handling Unit

310 KW 13,7 KW 3,4 KW

2,9 KW

38°C, 85% r.H.

29°C, 42% r.H.

18°C, 75% r.H.

17°C,

77% r.H.13°C, 100% r.H.

28°C, 45% r.H.

909.04.2014 LCC


Schematic of a AL-KO High Energy Efficiency Air Handling Unit

9,2 KW

0,18 KW 110 KW 3,8 KW

3,4 KW

38°C, 85% r.H.

44°C, 90% r.H.

49°C, 48% r.H. 36°C, 85% r.H.

32°C, 60%

r.H.

27°C, 73%

r.H.

13°C, 100%

r.H.

17°C, 77%

r.H.

18°C, 75% r.H.

29°C, 44% r.H.

28°C, 45% r.H.

0,10 KW

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Technical Calculation

• Chilling Demand

• FCU: 150 W/m² x 15.0000m²

=2,25 MW

• AHU: 310 KW x 6

=1,86 MW

• Simultaneous factor = 0,7

• 4,11 MW x 0,7 = 3,1 MW

• Machines to be installed:

5 Chilling machines

a‘ 0,6 MW

Standard AHU AL-KO High Efficient AHU

• Chilling Demand

• FCU: 150 W/m² x 15.0000m²

=2,25 MW

• AHU: 110 KW x 6

=0,66 MW

• Simultaneous factor = 0,7

• 2,91 MW x 0,7 = 2,0 MW

• Machines to be installed:

4 Chilling machines

a‘ 0,5 MW

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Comparison Schematic of the Chilling System with common AHU’s and AL-KO High Efficiency AHU’s

5 chillers 0,6 MW each

AHU chilling circle 660 KW

4 chillers 0,5 MW each

AHU chilling circle 1860 KW

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Technical Calculation

• Electricity Demand

• General demand:100 W/m² x

15.0000m² = 1,5 MW

• Chiller: 3,1 MW / 2,5

= 1,2 MW

• 1,5 MW + 1,2 MW = 2,70 MW

• Transformer to be installed:

2 Transformer a‘

1500 KVA


• Electricity Demand

• General demand:100 W/m² x

15.0000m² = 1,5 MW

• Chiller: 2,0 MW / 2,5

= 0,77 MW

• 1,5 MW + 0,77 MW = 2,27 MW

• Transformer to be installed:

2 Transformer a‘

1250 KVA

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Comparison Schematic of the Electric System with common AHU’s and AL-KO High Efficiency AHU’s

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BOQ and Cost Calculation

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BOQ and Cost Calculation of the unequal equipment of both solutions

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Cost Calculation of the unequal equipment of both solutions

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Cost Calculation of the unequal equipment of both solutions

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Investment Calculation

• AHU

57.855,28 USD

• Chilling equipment

568.807,78 USD

• Electrical Equipment

490.860,67 USD

Total Costs

1.117.523,72 USD

• AHU

284.761,55 USD

• Chilling equipment

354.804,93 USD

• Electrical Equipment

443.971,70 USD

Total Costs

1.083.538,18 USD


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Conclusion

The Usage of AL-KO High Energy Efficient Air

Handling Units effects lower Construction costas the common solution.

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Operation Costs - 80% of Life Cycle



Optimization

Refitting

Refurbishment


Period under

consideration

5 10 15



2409.04.2014 LCC

LCC – Operation Costs

Main Points of Operation Costs of a bulding

•Service Costs- Use easy cleanable Equipment,

- Efficient Management,

- Support Security-Staff with electronic Devices

•Refurbishment and Renovation Costs- Use high quality equipment with long Life – and Usage Period

•Energy Costs

2509.04.2014 LCC


Consideration of the primary energy demand for buildings

Effective energyPrimary

energy

End energy

Gene

rationStorage

Distri

bution

Transfer

Calculation of the energy demand

2609.04.2014 LCC

LCC – Operation costs

Global oil producing volumes

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Development of crude oil price

From 2004 to 2007 the

price for crude oil has

increased around 80%

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Conclusion

•Reducing the energy demand of an building is the most important factor to lower down the operating costs

•Energy efficient buildings are more competitive and increasing the profit and turnover

•The value of an energy efficient building is higher than an standard building

•The Living and Operating Period of an energy efficient building is longer- the investment is safer

2909.04.2014 LCC

LCC – Calculation

Issues to be considered in LCC

• Client‘s specific- Operation time

- Supply-temperature

• Investment Costs- Bank loans

• Energy Costs- Electricity

- Chilling

- Heating

• Maintenance Costs- Technical inspections

- Cleaning

- Spare parts

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1‘st Calculation – considering the purchase costs of the ahu‘s only

• Operating time- 12 hour a day, 6 days a week

• Energy Costs (average of the next 10 years)- Electricity Costs: 0,10 EUR per KWH

- Heating Costs: 0,10 EUR per KWH

- Chilling Costs: 0,08 EUR per KWH

• Investment costs- 5% annual bank loan

• Maintenance Costs- 2% of the investment cost annually

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2‘nd Calculation – considering the investment costs of the

airconditioning system (equal investment)






• Maintenance Costs

- 2% of the investment cost annually

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• Maintenance Costs- 2% of the investment cost annually

2‘nd Calculation – considering the investment costs of the

airconditioning system (equal investment)

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Conclusion

Using the AL-KO High Efficient Air Handling Unit is not only cheaper in

the Investment Phase it is saving also a huge amount of money in the Operation phase of the building

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LCC – Further Benefits of AL-KO AHU‘s

• Quality and Hygienic

- All panels are galvanized and powder coated inside and outside

- The panels and surfaces are smooth without any corners and gooves

- The panels are completely cold bridge free

- The AHU is nearly 100% leakage free caused by the usage of an AL-KO-patented sealing

- Using plug-fans to avoid belt wear

- The frame is made of GFK (fibre glass) to avoid condensation

- The AHU is completely dismantable and thus easy to clean

- The drop pan is always made of stainless steel

- Only the best manufacturers are allowed to deliver part to our ahu‘s such as Siemens, Gebhardt, Belimo, Trox, Klingenburg, Danfoss

- 5 Years warranty against corrosion

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Thank you very much for Thank you very much for

your attentionyour attention

Please visit us on www.al-ko.com

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LCC – LIFE CYCLE COST CALCULATION FOR AHU’s · PDF file09.04.2014 Birger Golke,...

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