Combined heat pump and water-power plant at Kaunas Lagoon

Abstract

Heat pump plants for district heating are one of the renewable energy technique as well as the means to make modern power grid more flexible. The combined heat pump and power plant presented in this work corresponds both of the objectives. High coefficient of performance of the heat pump and low price of the off-peak electricity of the water-power plant ensures low heat price. The reservoir of 20000 m3 is needed for hot water accumulation. Economic analysis revealed that the expected heat price is much lower when compared with the price of modern condensing boilers fuelled by wood chips. This ensures fast payback of investment.