ISSUE 20



Kyiv National University of Construction and Architecture (KNUCA)

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VENTYLIATSIIA, OSVITLENNIA TA TEPLOHAZOPOSTACHANNIA

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E. Malkin, Sc.D, professor, Kyiv National University of Construction and Architecture, Kyiv, Ukraine, saodhar@gmail.com
N. Zhuravska, PhD, associate professor, National University of Construction and Architecture, Kyiv, Ukraine, nzhur@ua.fm


Calculations of Energetic and Exergetic Efficiency of Hot Water Systems


Abstract. The paper shows the methodology and examples of calculations of energetic and exergetic efficiency of hot water systems. Conducted on the basis of the developed method of thermodynamic analysis the results of previous studies are confirmed and it is shown that the proposed system is achieved by increasing the energy efficiency of 3.5 ... 9 times, energetic efficiency for industrial enterprises - in 3 ... 6 times, and the energetic efficiency for housing sector - 4 ... 20 times. Especially effective are individual refrigeration and heat pump systems that provide an increase in energy efficiency of 20 ... 60 times, exergy efficiency - 6 ... 60.


Key words: energy efficiency of hot water systems, exergy efficiency of hot water systems


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