This document summarizes several case studies of businesses and organizations that implemented energy efficiency solutions to reduce costs and increase savings. It describes old and new situations for each case including energy and cost details. Solutions implemented include a heat pump for hot water, solar panels for electricity production, cogeneration systems using biomass or natural gas, absorption chillers, biogas systems, geothermal pumps, and steam generators. Savings ranged from thousands to tens of thousands of euros annually with payback periods of 1.7 to 5.3 years for the investments made in new energy efficient technologies.

2. ENERGY EFFICIENCY –
TREND OR NECESSITY
2

3. ALEXANDER VODENICHAROV
ALLIANCE FOR SUSTAINABLE DEVELOPMENT
3

4. 4
Energy audit
What is energy audit?
Economic feasibility of the audit.

5. 5
Thermodynamic solar panels

6. Old
Situation
Solution New
Situation
Consumed hot water, l/d 8 000 heated by GTC
016
heat pump with
23 kWth nominal
energy
output, 16
panels
8 000
Electricity consumption,
MW*h/year
118 29,5
Cost of the electricity
consumption, EUR/year
5 070 2 358
Investment - total price, EUR 11 520
Saving of money, EUR/year 2 712
Payback period, year 4,2
* Gas price – 0,4 EUR/m3
* Electricity price - 0,08 EUR/KW*h
6
Cardboard factory.
Replacement gas for heating of water for sanitary purposes

7. 7
Photovoltaic
Using solar panels for electricity production

8. 8
LOGISTIC CENTRE. Replacement electricity for illumination of storage halls
Old
Situation
Solution New
situation
Electricity consumption,
kW*h/year
17 351 PV system – 64 μc-Si
NT-150 AF PV panels,
150 W, DC each;
total installed power
– 10,2 kWp
17 351
Produced electricity,
kW*h/year
15 300
Electricity purchased for
illumination, kWh/year
2 051
Cost of electricity, EUR/year 1 735 205
Investment, total price, EUR 8 160
Saving of money, EUR/year 1 530
Pay back period, year 5,3
* Electricity price - 0,10 EUR/kW*h/year

9. 9
Cogeneration installation

10. 10
1. Piston gas engine
1 2
2. Power generator
3
3. Plate heat exchanger
6
6. Water cooled exhaust collector
5
5. Pipe-in-pipe heat exchanger
74
8
7. NOx catalyzer
4. Shell-pipes heat exchanger
8. Silencer
600 O
C
450 O
C
100 O
C
86°C
80°C
70°C
80°C
90°C
Inlet
Outlet
Cogeneration installation

11. 11
Spa Club and Hotel. Replacement of heating oil and electricity with LPG
Old Situation Solution New
Situation
Consumed oil 153 Cogeneration
system CHP EM
140/207 – 140
kW nominal
electric
output, 207
nominal
thermal
output. LPG
fuel.
237
Electricity to substitute
MW*h/year
1 176
Cost of oil, EUR/year 179 443 220 574
Cost of electricity,
EUR/year
117 600
Cost for maintenance,
EUR/year
25 200
Investment, total price,
EUR
170 000
Saving of money, EUR/year 51 269
Pay back period, year 3,3
• Heating oil price –
• Electricity price –
• LPG price -
1,18 EUR/kg
0,10 EUR/kW*h
0,93 EUR/kg

12. 12
 Minimal power consumption.
Electricity is used for the pumps
and the automation.
 Minimum noise level.
Environmentally friendly. The
coolant is regular water.
 Uses waste heat from hot water,
flue gas or manufacturing
processes.
 Long service life (at least 20
years).
 Full automation.
 Fire and explosion safe
Absorption chillers

13. 13
Agrifood Market
CASE – max. efficient heating , cooling and hot water producing
SOLUTION – 5xROBUR GAHP/AR absorption heat pump + 3xROBUR ACF60
absorption chiller – 136 kW cooling output, 160 kW heating output.
SITUATION – 800 m2 roofed agrifood market.
1. 40% less gas consumption for heating and hot water production.
2. 10% less costs for cooling
3. No need from boiler room – no lost of commercial area – no lost of income from rent.
4. No need from trained operators – savings from salaries .
5. Very low maintenance costs – one system , practically no moving parts.
SAVING OF MONEY = around 23 000 EUR/year, compere with standard installation.
RESULTS:
INVESTMENT COST= 110 000 EUR
Investment cost are equal to standard
installation with gas boiler and electric
chiller.
•Electricity cons. = max. 12 kW/h
•Gas cons. = max. 21,6 Nm3/h summer
•Gas cons. = max. 13,5 Nm3/h winter

14. 14
Energy from biogas

15. 15
SLAUGHTERHOUSE. Biogas installation
•CASE – economically efficient treatment of organic waste
•SOLUTION – EUCOlino 100 biogas system – 100 kW electricity output,
120 kW heating output.
•SITUATION – 5 000 t/h slaughterhouse organic waste.
1. Saved investments in waste water treatment and
boiler installations = 50 000 EUR
2. Saved money from transport and taxes of 5 000 t/y
organic waste for incineration = 50 000 EUR/y
3. Saved money for heating and hot water with boiler on
LPG = 54 706 EUR/y
4. Income from sells of green electricity = 185 292 EUR/y.
5. Income from sells of organic fertilizer = 50 000 EUR/y.
6. O&M costs = 95 000 EUR/y
•POSSITIVE RESULT = around 284 998 EUR/year, compere
with standard installations for heating, waste water and
organic waste treatment.
•PAYBACK PERIOD = less than 3 years
Results:
•INVESTMENT COST = 750 000 EUR
CONDITIONS: -Transport and treatment cost = 10 EUR/t
- FIT green electricity price = 0,23 EUR/kWh
- LPG price = 0,93 EUR/kg
- Price for sells of organic bio fertilizer = 10 EUR/t

16. 16
Geothermal pumps
• EconomicalEconomical
Annual heating cost 4-6 times lower
as compared to conventional
boilers.
• Without gasWithout gas
Geothermal pumps do not use gas for
heating and DHW.
• SafeSafe
The system is not connected to liquid
fuel, explosive material and no
high temperature processes.
• EnvironmentalEnvironmental
Heat pumps do not emit harmful
substances.
With this installation, 75% of the energy for heating and DHW provision is a gift from nature. During
the summer the installation can be used for cooling.

17. 17
Replacement of natural gas and electricity for heating and cooling of 1 000 m2 supermarket
with geothermal energy
OLD
SITUATION
SOLUTION NEW
SITUATION
Consumed natural gas,
Nm3
/y
16 516 Geothermal pump
4 x VITOCAL 300 G –
164 kW nominal
thermal output, 27 kW
nominal electricity
Input
1 000 m2
ceiling pipes
heating and cooling, 1
000 m2
earth connected
coil pipes collector.
Consumed electricity,
MWh/ year
128 6,5
Cost of gas , EUR/year 8 258
Cost of electricity ,
EUR/year
12 800 650
High comfort with “natural cooling” – no air flows
Investment, total price, EUR 70 000
Saving of money, EUR/year 20 408
Pay back period, year 3,4
• Natural gas price –
• Electricity price -
0,5 EUR/Nm3
0,10 EUR/kWh

18. 18
Steam Generator

19. 19
Plant for the production of beverages. Replacing the steam boiler with a
new steam generator.
Old
Situation
Solution New
Situation
Steam production, t/h 4 CLAYTON SEG 254
– 4 t/h nominal
steam output, 2
452 kW nominal
thermal output,
complete new
boiler room,
equipped for 72
hours unattended
operation
4
Natural gas consumption
Nm³/year
857 364 689 355
Cost of natural gas
consumption, EUR/year
342 946 275 742
Operation cost (Before - 4
trained operators, After -
2), EUR/year
28 800 9 600
Investment, total price, EUR 150 000
Saving of money, EUR/year 86 404
Pay back period, year 1,7
• Natural gas price 0,4 EUR/Nm³

20. 20
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