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Wilo introduces high-efficiency pump for thermal solar installations |
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Thursday, 08 March 2007 |
Wilo´s latest type of high efficiency pumps much better fulfils the needs of solar thermal installations than conventional heating pumps, affirms the company in a press release.
Since years excessively low-current high-efficiency pumps in heating and cooling installations as well as in secondary hot water circulation ensure that electricity costs for pump operation are reduced by 80 percent. For the first time the pump expert Wilo AG from Dortmund also has a high-efficiency pump for thermal solar installations in its product range.  "Wilo-Stratos ECO-ST" is designed especially for the use in solar process water heating and for heating support in one to six-family houses. Until now, in solar thermal installations mostly conventional heating pumps were used, whose power profiles were, however, not optimally adjusted to this field of application. Thus they unnecessarily consume much current, which is counterproductive against the background of the desired ecological and economical effect while using solar energy.
The ST (solar thermal) version of "Wilo Stratos ECO" has an 0-10 V interface, which allows a complete integration of the pump into the system control. The pump is controlled by the solar controller on the basis of the temperature difference between the collector and the storage.
The new pump with EC motor technology consumes – like the available high-efficiency pumps of the 'Stratos' and 'Stratos ECO' series – up to 80 percent less power than uncontrolled pumps. Due to very low power consumption of only 5.8 Watt in no-load operation further electricity savings will be achieved. In addition, the EC motor has a three times higher starting torque. A standard cataphoresis coating of the cast iron housing prevents corrosion. Furthermore 'Stratos ECO-ST' is also available with red brass housing for utilisation in drain back systems. |
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