ЗАСТОСУВАННЯ КРИТЕРІЇВ ПОГЛИБЛЕНОГО ЕКСЕРГЕТИЧНОГО АНАЛІЗУ ДЛЯ ОБГРУНТУВАННЯ РІШЕНЬ ЗПІДВИЩЕННЯ ЕНЕРГЕТИЧНОЇ ЕФЕКТИВНОСТІ ТЕПЛОНАСОСНОЇ УСТАНОВКИ НА СТІЧНИХ ВОДАХ.

On the base of criteria of advanced exergetic analysis location, magnitude and causes of thermodynamic inefficiencies are identified within a wastewater source heat pump system providing space heating. It is shown that for the investigated conditions, the biggest part (76 %) of exergy destruction in the compressor and all exergy destructions in throttling valve can be avoided by reducing irreversibilities in the remaining components of the system. 90...97 % of exergy destructions, which can be avoided in the condenser, evaporator and the wastewater heat exchanger, are mainly caused by irreversibilities within these components. The biggest part (40 %) of avoidable exergy destruction in the heat pump is due to thermodynamic inefficiencies (caused by temperature difference) in the wastewater heat exchanger. The condenser and the evaporator have fewer possibilities (respectively 29 and 24 %) for improving exergy efficiency of the system. The compressor has the last and minor priority for decreasing irreversibilities. According to the data obtained, in order to improve the energy efficiency of such system irreversibility within wastewater heat exchanger should be of the highest priority to decrease. For this case the temperature difference within this component should be decrease. The obtained conclusions are confirmed by calculating seasonal electricity consumption of different cases of the heat pump improvement. It is shown that enhancement wastewater heat exchanger provides the highest (up to 12%) reduction of seasonal electricity consumption. [ABSTRACT FROM AUTHOR]