Higher efficiency and lower operating cost with ClimateMachines™
In comparison with battery and rotary heat exchangers, Climate Machines have significantly lower operating costs. Evaporative cooling of the exhaust air gives cooling at a price of 0,4 SEK/kWh, which is 95% cheaper than district cooling.
Higher efficiency than conventional solutions
The calculations are made for a normalized year and investment costs are equated as there are lower connection charges (about 150 000 SEK for cooling), reduced costs for pipes and batteries.
A schematic airflow and technology diagram shows that the ClimateMachines™ principle provides higher efficiency than conventional air handling solutions, both during winter and summer.
Operating cost of Climate Machines compared to battery and rotary heat exchangers
The table below displays the data that has been used to calculate operating costs and to make the comparison with conventional heat exchangers
|Annual average||6.5 C|
|Dimensioning outdoor temperature (DOT)||-18 C|
|Normal annual total||3,620 (SMHI)|
|Operating hours||8,760 h|
|Electricity costs||SEK 1.0/kWh|
|District heating||SEK 0.7/kWh|
|Cost of interest||4 %|
|Working life||20 years|
|Energy price increase||2 %|
|Supply air||19 C|
|Exhaust air||22 C|
|Effects from district heating to post-heating Climate Machines||44 kW|
|Rotary heat exchanger||110 kW|
|Battery Transmitter||200 kW|
The calculations also include the evaporative cooling in the Climate Machine. The cost of that cooling is only 0.04 SEK/kWh (water cost 15 SEK/m3), compared to the district cooling with a cost of 0.6 SEK/kWh.
The need for comfort cooling is estimated at 1000 h / year. A 10 m3/s Climate Machine generates a cooling power of approximately 150 kW. In this case, it means a reduction of the fixed cost of the district cooling charges of approximately 150 000 SEK/year.