The aim of the project – perform complex investigation on heat transfer of water sprayed into flue gases and vapour condensation and on the mist different pollution levels and use the results to optimize cleaning and waste heat recovery technologies while ensuring efficient and sustainable energy generation in biofuel boiler houses. During the Project, the researchers have investigated the heat transfer of sprayed water in flue gas and water vapor condensation from water in flue gas (exhausted from biofuel) numerically and experimentally. Responsibilities of KTU researchers in project were to develop and upgrade software for simulation droplet’s thermal state and heat and mass transfer (HMT)
Project funding:
Projects funded by the Research Council of Lithuania (RCL), Projects carried out by researchers’ teams
Project results:
The software LASAS was developed and upgraded during the Project, has been used to simulate HMT processes in every phase change regime of the droplet. A complex perspective has been employed in the numerical investigation of water droplet HMT for the interaction of combined transfer processes, which take place during condensation, transition and equilibrium evaporation phase change regimes of the droplet. Analysis has highlighted the influence of droplet dispersity on the HMT processes.
The experimental investigation of water droplet heating up and phase changes has been carried out in a newly constructed experimental setup. The obtained results confirm that additionally humidified flue gas changes the intensity of transfer processes in all phase change regimes of the droplet.
Experiments of water vapor condensation in flue gas have been performed at LEI Nuclear Engineering Laboratory using a reconstructed experimental setup. Analysis of the experimental results showed no considerable influence on heat transfer in the condensing economizer comparing the two cases. Finally, a heat pump mockup has been developed in order to recover low potential waste heat. Numerous experiments have been performed for this purpose, and the influence of various parameters on heat recovery in the heat pump has been defined.
Period of project implementation: 2020-03-10 - 2022-12-31
Project coordinator: Lithuanian Energy Institute
Project partners: Kaunas University of Technology
