Air-Source vs. Water/Ground-Source Heat Pump Systems ...

CoolEnergy.dk – March 6-7 th, 2013 – Odense, Denmark
Air-to-Water HPs – Comments
› Air-to-water vs. brine-to-water heat pumps
› Less energy saving due to lower SPF and lower energy coverage
› Shorter lifetime due to large temperature variations
› Lower outlet water temperature for same ”technologcial level”
› Technolocial development for air-to-water HP systems
› Two-stage system design
› Economizer compressor design
› Cascade system design
› Scroll compressors witl EVI (Economized Vapour Injection)
› Mono screw compressors – variable speed drive, v i control
› Improved demand controlled defrosting systems
› Optimized evaporator design – larger fin distance etc.
› Surface treatment of evaporators ("blue/gold coating")
› Improved control systems etc.
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MARCH 7TH, 2013
COWI POWERPOINT PRESENTATION