Wilo-Star-RSG for Geothermal Installations
In view of the increasing energy costs during the last years and the increasing climate consciousness, experts expect that soon every tenth new heating will be a heat pump system.
More than the half of the new installed heat pump heating systems are geothermal installations.
Therefore the pump expert WILO AG has extended the range of its standard pump series "Star-RS" by a new model. With the "Wilo-Star-RSG" now a circulating pump is available which is adjusted especially to the hydraulic demands of geothermal installations. In this area a larger volume flow and corrosion-resistant pump housings are required.
The new "Wilo Star-RSG" is available in four variants. It supplies a maximum flow of 5.5 m3/h and reaches - depending on the variant - a delivery head of up to eight metres. In order to avoid corrosion when condensation water forms, the pump housing is KTL-coated. Furthermore the pump is suitable for pumping water-glycol-mixtures up to a mixture proportion of 1:1. The temperature range of the fluid ranges from -10° C to +110° C. A 3-stage stage switch facilitates an adjustment of the flow rate according to the demand. The drive unit is in blocking-current proof version.
The "Wilo-Star-RSG" can be installed easily thanks to a handy spanner grip at the pump housing and an electronic quick connection with spring clips. The cable can be lead in either on the right or on the left side. Using high-quality materials guarantees highest operational safety.
In geothermal energy systems heat is extracted from the ground to be used for room heating and the supply of hot water with little use of electrical auxiliary power. The heat pump sources about 75 percent of the heating energy from the ground. Below the line this technology reduces the CO2 emissions by more than 30 percent compared to a gas or oil heating system. The energy costs are only about half as high; despite additional costs for purchase and installation, the heat pump heating normally pays off within six to ten years.
Current market figures give proof of the potential of this technology: In 2006 almost 44,000 heat pump heating systems have been installed in Germany, which is an increase of 150 percent compared to the previous year. In the first half year of 2007 the market once more increased by 30 percent - in contrast to the heavily declining trend in the other heating sector.
Source: WILO SE