Againity

Background:

The heating plant in Ystad, Sweden, owned by Ystad Energi AB, produces 100 % renewable district heating. The plant has two main boilers of 10 MW each and are mainly fired by chipped branches and tops that remain after deforestation. Ystad Energi decided to invest in three ORC-turbines to become less dependent on the electricity supply via the grid, where lack of capacity have become a more frequent issue. The two 10 MW-boilers are equipped with one ORC-turbine each. The third ORC-turbine will be complemented with a 5 MW boiler.

Our solution:

Againity delivered three automated ORC-systems with a maximum capacity of 750 kW electricity prodcution. The ORC-systems enables electricity production from the boilers’ hot water. When each of the ORC-turbines are installed, the expected produced electricity is 3220 MWh annually, which corresponds to annual emission savings of 2900 CO₂-equvielents when replacing European marginal electricity. Ystad Energi chose to sign a service agreement with Againity to ensure a long lifetime, minimal maintenance and optimized electricity production.

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3 quick questions to Vinko Culjak, district heating manager at Ystad Energi:
1. Why did you choose to invest in an ORC turbine?
For us, it was of importance that the investment would be both profitable and sustainable. Solar cells have been hyped-up, but looking at cost calculations per kWh, it motivates an investment in an ORC-turbine. Then there is the problem of load on the electricity grid, where cogeneration is important. Many small streams make a difference in the end.

2.  What gave you confidence with choosing Againity?
I’d have to say the technology and simplicity itself. With few moving parts, there’s not much that can go wrong. It’s simple and robust.

3. What would you highlight towards other heating companies looking for electricity production?
The fact that you can have your own local environmentally friendly electricity production with hot water boilers and at the same time reduce the load on the electricity grid. I would also emphasise the simplicity and robustness, which is why we chose you.

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Owner: Ystad Energi AB
Location: Ystad, Sweden
Existing boilers: 2x10MW, 1x5MW
Fuel: Wood chips
Heat generation after fuel gas condensation: 110 GWh/year
Temperature boiler circuit: 140°C
Temp DH-return, after FGC, average: 58°C
Total electricity production, 2 x ORC: 2477 MWh/år*
*The total electricity production from two ORC-turbines corresponds to emission savings of 2229 CO₂-equvivalents when replacing European marginal electricity.

Background:

The heating plant in Kungälv is owned by Kungälv Energi AB and uses bio-boilers to produce district heating for the municipality. Kungälv aims to be 100% fossil-free, where an investment in an ORC is ideal for a fossil-free electricity production. With the investment in an ORC system, Kungälv contributes to a more sustainable and climate-smart society.

Our solution:

Againity delivered an automated ORC system with a maximum capacity of 560 kW electricity production. The ORC system enables electricity production from the boiler’s hot water. In total, the system is expected to produce 3080 MWh annually, corresponding to emission savings of 2772 tonnes of CO2 equivalents when substituting coal-based electricity.

Owner: Kungälv Energi AB
Location: Kungälv, Sweden
Existing heat plant: 10.5 MW
Fuel: Biofuel
Heat generation: 72.2 GWh/year
Temperature boiler circuit: 150°C
Return temperature district heating: 48°C
Againity’s delivery: ORC AT500
Expected electricity generation: 3080 MWh/year

Background:

The district heating in Eskilstuna is owned by Eskilstuna Strängnäs Energi och Miljö (ESEM). ESEM chose to build a new heating plant and at the same time invest in an ORC system to reduce its electricity costs and load on the local grid.

Our solution:
Againity delivered an automated ORC system with a maximum capacity of 99.9 kW of electricity production. The ORC system enables electricity production from the boiler’s hot water. In total, the system is expected to produce 355 MWh annually, corresponding to emission savings of 320 tonnes of CO2 equivalents when substituting coal-based electricity. ESEM also chose to sign a service agreement with Againity for minimal maintenance and to ensure a long lifetime of the ORC system.

Owner: Eskilstuna Strängnäs Energi och Miljö AB
Location: Eskilstuna, Sweden
Existing heat plant: 3 MW
Fuel: Wood chips
Heat generation: 12.5 GWh/year
Temperature boiler circuit: 125°C
Return temperature district heating: 46°C
Againity’s delivery: ORC AT100
Expected electricity generation: 355 MWh/year

Background:

Idex Baltic operates in Lithuania and is the largest independent heat producer in the country. Idex chose to supplement two of their heating plants in Vilnius with ORC, one of these is the Paneriškių heating plant. The heating plant is powered by biofuel boilers using materials such as wood chips and forest residues as fuel. To be able to produce its own electricity and at the same time work towards a more climate-smart society, Idex chose to supplement the heating plant with ORC systems.

Our solution:
For the Paneriškių heating plant, Againity supplied two automated ORC systems with a total maximum capacity of 800 kW electricity production. The ORC systems enable electricity production from the hot water of the bioboilers. The Paneriškių heating plant is expected to produce a total of 3885 MWh annually, corresponding to 3497 tonnes of CO2 equivalents when substituting coal-based electricity.

Owner: Idex Baltic UAB
Location: Paneriškių
Existing heat plant: Biofuel boiler
Heat generation: 131 GWh/year
Temperature boiler circuit: 128°C
Return temperature district heating: 54°C
Againity’s delivery: 2 x ORC AT500
Expected electricity generation: 3885 MWh/year

Background:

Idex Baltic operates in Lithuania and is the largest independent heat producer in the country. Idex chose to supplement two of their heating plants in Vilnius with ORC; one of these is the Pakalniškių heating plant. The heating plant is powered by biofuel boilers that use materials such as wood chips and forest residues as fuel.  To be able to produce its own electricity and simultaneously work towards a more climate-smart society, Idex chose to supplement the heating plant with ORC systems.

Our solution:
Againity delivered two automated ORC systems with a total maximum capacity of 800 kW electricity production, to the Paneriškių heating plant. The ORC systems enable electricity production from the hot water of the bio-boilers. In total, for the Pakalniškių heating plant, the system is expected to produce 2870 MWh annually, which corresponds to 2591 tonnes of CO2 equivalents when substituting coal-based electricity.

Owner: Idex Baltic UAB
Location: Pakalniškių
Existing heat plant: Biofuel boiler
Heat generation: 106 GWh/year
Temperature boiler circuit: 128°C
Return temperature district heating: 54°C
Againity’s delivery: 2 x ORC AT500
Expected electricity generation: 2870 MWh/year

Background:

The heating plant in Skurup is owned by Solör Bioenergi AB. The heating plant mainly burns biofuels, which consist of wood chips and pellets. The heating plant chose to supplement its facility with an ORC system to reduce its internal electricity costs through its own electricity supply and at the same time aim for a more climate-smart and sustainable society.

Our solution:
Againity delivered an automated ORC system with a maximum capacity of 75 kW electricity production. The ORC system enables electricity generation from the boiler’s hot water. In total, the system is expected to produce 396 MWh annually, corresponding to emission savings of 356 tonnes of CO2 equivalents when substituting coal-based electricity.

Owner: Solör Bioenergi Syd AB (earlier, Lantmännen Agrovärme AB)
Location: Skurup, Sweden
Existing heat plant: Biofuel boiler
Heat generation: 29.9 GWh/year
Temperature boiler circuit: 116 °C
Return temperature district heating: 55 °C
Againity’s delivery: ORC AT100
Expected electricity generation: 396 MWh/year

Background:

Bio Mobitek OÜ is a boiler manufacturer active in several countries. A project in Tallinn, Estonia, involved an investment in an ORC system for a waste incineration boiler, which was delivered to the waste management company AS Eesti Keskkonnateenused. The addition of the ORC system resulted in a sustainable, local electricity production, contributing to a more climate-smart and sustainable society.

Our solution:
Againity delivered an automated ORC system with a maximum capacity of 110 kW electricity production. The ORC system enables electricity generation from the boiler’s hot water. In total, the system is expected to produce 760 MWh annually, corresponding to emission savings of 691 tonnes of CO2 equivalents when substituting coal-based electricity.

Owner: Bio Mobitek OÜ
Location: Tallinn, Estonia
Existing heat plant: 2 MW
Fuel: Waste
Heat generation: 17,6 GWh/year
Temperature boiler circuit: 120 °C
Return temperature district heating: 30 °C
Againity’s delivery: ORC AT100
Expected electricity generation: 760 MWh/year

Background:

The construction of the district heating network in Karlskrona began in year 1990. Gullberna heating plant is one of three district heating plants owned by Affärsverken Karlskrona AB, which has been chosen to be supplemented with an ORC system. The investment in the ORC system has helped Affärsverken Karlskrona in the transition to renewable green energy. The plant has now a self-sufficient electricity production with the ORC system, which, at the same time, helps to reduce the load on the local electricity grid.

Our solution:
Againity delivered an automated ORC system with a maximum capacity of 355 kW electricity production. The ORC system enables electricity production from the boiler’s hot water. In total, the system is expected to produce 1330 MWh annually, equivalent to 1200 tonnes of CO2 equivalents when substituting coal-based electricity.

Owner: Affärsverken Karlskrona AB
Location: Karlskrona, Sweden
Existing heat plant: 12 MW
Fuel: Biofuel
Heat generation: 43.3 GWh/year
Temperature boiler circuit: 142°C
Return temperature district heating: 53°C
Againity’s delivery: ORC AT500
Expected electricity generation: 1330 MWh/year