Abstract
A tendency to increase the importance of so-called dispersed generation,
based on the local energy sources and the working systems utilizing both
the fossil fuels and the renewable energy resources is observed nowadays.
Generation of electricity on industrial or domestic scale together with
production of heat can be obtained for example through employment of the
ORC systems. It is mentioned in the EU directive 2012/27/EU for
cogenerative production of heat and electricity. For such systems the
crucial points are connected with the heat exchangers, which should be
small in size but be able to transfer high heat fluxes. In presented paper
the prototype microjet heat exchanger dedicated for heat recovery systems
is introduced. Its novel construction is described together with the
systematical experimental analysis of heat transfer and flow
characteristics. Reported results showed high values of the overall heat
transfer coefficient and slight increase in the pressure drop. The results
of microjet heat exchanger were compared with the results of commercially
available compact plate heat exchanger.
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