Groundbreaking large scale CO2 heat pumps by Advansor
R744.com - 2009-08-05
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Advansor’s new series of large scale CO2 heat pumps represent the best practice in the field of single stage high temperature heat pumps. Suitable applications range from industrial operations through to hot water production in district heating systems. A 1MW compHEAT heat pump was recently delivered to a Danish municipal district heating grid.
With its new compHEAT series of large scale heat pumps, the Danish company Advansor is defining new frontiers within the application of CO2 heat pumps. The machines are capable of delivering high temperatures of up to 85ºC in the capacity range from 150kW to 1500kW.

Applications include industrial operations and district heating systems

By the utilisation of highly efficient compressors and effective heat exchangers the compHEAT heat pump represents the best practice in the field of single stage high temperature heat pumps. The application of the heat pumps ranges widely from industrial operations to the field of hot water production in district heating systems. compHEAT is actually the first of its type to be installed in district heating installations.

"Large scale centralised CO2 heat pumps is a perfect alternative to fossil fuels to provide domestic heating with zero carbon emission", says Torben Hansen, Director of Advansor.

1MW machine delivered to Danish municipal district heating grid

Recently, a 1MW machine has been delivered to a Danish municipal district heating grid. The heat pump takes up the heat from the city’s sewage waste water before the water is pumped in to the sea. The heat is delivered as 80ºC warm water directly in to the district heating grid. With the rising prices on fossil fuels and increasing shares of carbon emission neutral electricity the high temperature heat pumps constitute both an environmentally and economically sound future proofed solution.

About Advansor

The Danish supplier manufactures and sells CO2 thermal systems for heating, cooling and refrigeration in combined heating and power plants, food factories and the process industry. Advansor also offers analysis and consultancy to ensure optimal energy and cost savings.
Contact Information
If you would like to contact Advansor for any enquiries, you may send a request to Torben M Hansen directly.
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2009-08-10 17:15:16 - leonardo sulila
I would like to say that this way to send documents weekly is very important for us as developing countries without sorce to get alot of information about this ozne layer and chemical substances. please keep this way us as peolpe who is interest on this matter.

Bes Regards

Sulila
2009-08-10 14:12:28 - Torben M Hansen
Thank you for the kind words Mr Visser, we are excited every day to explore the new possibilities being enabled with CO2 as working fluid.

With respect to compressors we are using the biggest availbale recips for heat pumps up to 1,5MW which requires 16 compressors. At the most common applications we would probably be working at evaporation pressures between 0C and 15C, i.e. the compression ratios is around 2 and 3. For this reason only higher cost would result from 2 stage machines.
Larger compressors of course still is of interest - but it most be noted that the recips applied actually gives the better isentropic efficiency.
The use of expander machines would be the ultimate way to maximize COP.

With respect to COP (heating/power):
The COP is very much depending on the entry temperature of the water to heated:
COP at 15C evaporation: Water entry/exit 40C/80C: approx 3,7
COP at 15C evaporation: Water entry/exit 20C/80C: approx 4,3

Please contact on email for fuhter details.



2009-08-05 13:19:26 - Klaas Visser
Congratulations once more to Advansor! You certainly do your name proud.

It is nice to see two of Gustav Lorentzen's ideas come to fruition in this one project, ie using a decent size CO2 heat pump (GL idea No 1) pump heat from sewage (GL idea No 2). Years ago I saw the prototype non-contaminating SS evaporator in the Trondheim laboratory.

Given the size of the heat pump and the large number of compressors used, I wonder if any thought was given to using a few of the many compressors as parallel compressors. Alternatively, was any thought given to two staging the heat pump with heat recovery from both comppression stages? Am I right in thinking that the COP of the system is close to four? I am curious to know, as I am working on a fully integrated CO2 system for a small food factory, which will be a totally HFC free site. All mecahanical cooling functions like office AC, factory cooling, process chilled water, holding cooler, blast freezer and cold store as well as 90% of process hot and CIP and cleaning hot water, sanitary hot water, hot water for office heating and underfloor heating of the freezer and cold store will all be provide by a central CO system with three evaporating levels. Even the refrigerator will be changed to an HC unit!

Please give me some feed back on the heat pump COP so I may judge how close or far I am off the mark with my design. Thank you very much.

With best wishes and kind regards

Klaas Visser.
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