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Gewählte Master / Diploma Thesis:

Mireille Netzer (2011): Nutzung von Umweltwärme zu Heiz- und Kühlzwecken mit Schwerpunkt Wärmepumpeneinsatz.
Master / Diploma Thesis - Institut für Verfahrens- und Energietechnik (IVET), BOKU-Universität für Bodenkultur, pp 69 [47]. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
In times of an increasing energy consumption and a decreasing availability of energy resources at the same time, it is imperative to open up new energy sources. Solar energy, which is stored as solar thermal in the environment, is regenerated by continuous solar radiation, thus offering a large service capacity. Due to the fact that the temperature levels of environmental energy are very low, a direct utilization is not possible. For that reason the heat pump technology comes into use. This paper investigates the measured values taken over a trial period of 21 months, in order to calculate the energy balance and the economic efficiency of a water/water heat pump employed in a one family house. For the calculation of the heat flow rates the respective inlet and outlet temperatures were measured with Pt100 resistor-type thermometers, and the volume flows with liquid flow counters. That way the individual balance grids as well as the entire energy balance could be calculated. To demonstrate the difference between the heat pump efficiencies when in use during the winter- and summer cycles, parts of various test runs were explored in more detail. The differences in efficiency between a continuous and an intermittent operation were analysed. By taking the daily temperature figures into consideration, the energy expenses occurring during the trial period could be determined. When comparing the determined operating factors to values reported in technical literature, it could be noted that the calculated values were within the range expected in our investigation. Considering the potential capacity of this technology, it is our opinion that it is well worthwhile to direct future efforts towards the improvement of the efficiency of heat pump systems.

Beurteilende(r): Braun Herbert

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