Implementation phase; 2012– (in progress)

Helen Ltd. is currently constructing a district cooling station under the city centre of Helsinki.

The implementation phase of the project includes the following sub-projects:

• Excavation
• Construction works
• Process and machinery
• HVAC
• Electrification
• Automation

Performance data of the station (after first construction phase):

• Cooling capacity (accumulator only): 40 MW
• Water volume: 35 000 m³
• Energy capacity: 230 MWh

The installation of heat pump units (2 × 15 MW) depends on the DC customers’ connected capacity forecast; new installations are required when the connected DC load exceeds the production capacity.

Greenfield Consulting contribution to the project

Jussi-Pekka Kuivala M.Sc. (tech.) is assigned to support the project head engineer of Helen Ltd. The tasks include extensive studies and planning works as well as participating in the procurements and procurement control having reference to process and machinery sub-projects.

Pre-engineering of an Underground District Cooling Station, City Centre, Helsinki, Finland; 2011 – 2012

Helen Ltd. was planning to construct an underground district cooling station in the city centre of Helsinki. The cooling station would involve a rock cavern accumulator and a reservation for heat pump units for complementary cooling capacity.

Pre-engineering work included process and mechanical engineering, electrical, automation, HVAC and building engineering sub-projects.

Greenfield Consulting contribution to the project

Greenfield Consulting was assigned to support the project head engineer of Helen Ltd. The tasks involved the cooling station process engineering, including the selection of optimal production capacity as well as the designing of both technically and economically optimal process flow diagram. The layout design was carried out based on the process and machinery engineering.

Client: Helen Ltd.

Helen Ltd. is one of the largest energy companies in Finland supplying electric energy to about 400,000 customers and covering more than 90 percent of the heat demand of the capital city with district heat. Helen Ltd. also produces and sells district cooling, which is considerably expanding in Helsinki.

Among the services provided by Helen Ltd. are the design, projecting and maintenance of energy production and distribution systems.