Innovation provider

PriiEnergia OÜ

Contact

Mäealuse 4, 12618 Tallinn, Estonia Phone + 372 677 5783 Meelis Resev meelis@priienergia.ee +3726775783 www.priienergia.ee

Description

Current heat exchanger is basically waste water pumping station with cooling function. It makes it useful in sectors: 1) waste water treatment – if the waste water pumping station needs to be installed or replaced, the heat exchanger could be installed, 2) Waste water cooling in new or renovation projects. For renovation projects, where the access to the building is limited, Priienergia OÜ has developed a modular system, which can be transported in smaller parts and assembled inside of the house. First prototype was installed in an apartment house near Tallinn (Tabasalu) and shows it’s ability to cool +30oC waste water down to +3 oC.

Advantages

At the moment, mostly very small or quite large devices are available but no medium-size heat exchangers are available on the European market. The heat exchanger of Priienergia LLC fills this gap. The main advantages of the product are: cost-effectiveness, operating reliability, low maintenance costs, long product life, and remunerative price.
There is lot of facilities where a lot of warm effluent is emitted like in apartment blocks, kindergartens, hotels, hospitals, industrial facilities etc. Heat exchanger is especially price efficient when installed into the ground, as in this case there is no need to consider restricted access, and an optimal size for the device can be chosen. Also, the heat exchanger will absorb the heat of the soil, raising the efficiency of the system up to 10%. As a reference product, the product range is represented by a heat exchanger for an existing building, which is installed into the basement of a building. In this case, the device consists of modules, which thanks to their small measures, can be taken into the building without any damage to it. The assembly of a heat exchanger takes place in the basement.

Innovative aspects (ecologic, social and economic)

Environmental aspects:
The heat exchanger helps to improve buildings energy efficiency and offers also low maintenance costs. As heating up the domestic hot water makes around 30% of house’s heating bill, this device helps to reduce demand for heating energy and therefore lowers CO2 emissions. Heat exchanger can be installed in the basement or in the ground. In last case it also absorbs energy from the ground, works as a ground source heat pump.

Social aspects:
The device by essence is a tank full of air. So the transportation from long distances (from China for example) is not economical. It gives work for local people and all materials used in the device are European origin. Now it is made of PE-plastics, but locally recycled plastics can be useful in the future as well. Today it is built in Estonia, so it uses mostly local materials.

Economic aspects:
Costs for implementation are not high, because almost every European country has a factory which is able to produce it right away. Different funds also support such products. The cost for heating energy is one of the biggest parts in the family’s budget in northern countries. This device cuts up to 20% of house’s heating bill.
The price of the heat exchanger depends from the object and capacity. As an example the prototype was installed in a building with 60 apartments. It cost 20000 € and saves 120 MWh in a year. The calculated payback period is about 6 years on current energy price. The price of the energy is expected to increase quite lot in some years because of full market opening.

Application examples

Examples of application of the technology: energy from waste water, waste water treatment, geothermal energy
First prototype was installed in an apartment house near Tallinn, Estonia (Tabasalu) and shows it’s ability to cool +30oC waste water down to +3 oC. The company entered to market at the end of May 2011. So far there is only one prototype and some negotiations are held in Finland and Estonia. Sale is expected to increase because Estonian fund KredEx promised support to this product and housing corporations can apply for a financial support while renovating houses and wishing to install this current heat exchanger.

Cost

The price of the heat exchanger depends from the object and capacity. As an example the prototype was installed in a building with 60 apartments. It cost 20000 € and saves 120 MWh in a year. The calculated payback period is about 6 years on current energy price. The price of the energy is expected to increase quite lot in some years because of full market opening.

Downloads

Current stage of development

Available for demonstration – field tested
Entering the market 

Only the first prototype and some products are installed. Company has introduced their product to local market but is still entering and also hopes to export soon to other countries.

Intellectual Property Rights

Patent applied for
Heat exchanger has also been presented to European Patent Office in order to receive a patent in 8 European countries.

Country of origin

Estonia

Country of application

Estonia

Year

2011

National Contact Point

Antti Roose
Tartu Ülikooli, Geograafia Osakond
Vanemuise 46
51014 Tartu

Tel: +372 737 6841
Fax: +372 7375825

» antti.roose@ut.ee