processes Article An Experimental Investigation of Water Vapor Condensation from Biofuel Flue Gas in a Model of Condenser, (2) Local Heat Transfer in a Calorimetric Tube with Water Injection Robertas Poškas 1,*, Arunas¯ Sirvydas 1, Vladislavas Kulkovas 1, Hussam Jouhara 2 , Povilas Poškas 1, Gintautas Miliauskas 3 and Egidijus Puida 3 1 Nuclear Engineering Laboratory, Lithuanian Energy Institute, Breslaujos 3, LT-44403 Kaunas, Lithuania;
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[email protected] (P.P.) 2 Heat Pipe and Thermal Management Research Group, College of Engineering, Design and Physical Sciences, Brunel University London, Uxbridge UB8 3PH, UK;
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[email protected] (E.P.) * Correspondence:
[email protected]; Tel.: +37-037401893 Abstract: In order for the operation of the condensing heat exchanger to be efficient, the flue gas temperature at the inlet to the heat exchanger should be reduced so that condensation can start from the very beginning of the exchanger. A possible way to reduce the flue gas temperature is the injection of water into the flue gas flow. Injected water additionally moistens the flue gas and increases its level of humidity. Therefore, more favorable conditions are created for condensation and Citation: Poškas, R.; Sirvydas, A.; heat transfer. The results presented in the second paper of the series on condensation heat transfer Kulkovas, V.; Jouhara, H.; Poškas, P.; indicate that water injection into the flue gas flow drastically changes the distribution of temperatures Miliauskas, G.; Puida, E.