AN EXPERIMENTAL COMPARISON OF A HEAT EXCHANGER IN AN ABSORPTION HEAT TRANSFORMER OPERATING IN FALLING FILM AND POOL BOILING.
Special Symposium - Environmental Protection & Sustainability
Environmental Protection & Sustainability (EPS - Poster)
Keywords: heat exchanger, pool boiling, falling film, heat transformer
AN EXPERIMENTAL COMPARISON OF A HEAT EXCHANGER IN AN ABSORPTION HEAT TRANSFORMER OPERATING IN FALLING FILM AND POOL BOILING.
Silva S.S., Huicochea R. A., Siqueiros A. J.*
Centro de Investigación en Ingeniería y Ciencias Aplicadas – UAEM
Av. Universidad 1001, C.P. 62209, Cuernavaca Morelos, México
*corresponding author: jsiqueiroa@uaem.mx
huico_chea@uaem.mx
Keywords: heat exchanger, pool boiling, falling film, heat transformer
This work shows the experimental comparison of two operation modes for a heat exchanger into a absorption heat transformer. Absorption heat transformer has five main components: absorber, generator, condenser, evaporator and economizer. Heat exchanger was operated in generator mode. Its design was of 3000 W and the material of construction was stainless steel 316L. The versatile design of this equipment allowed prove it in both forms of operation as falling film with horizontal tubes and pool boiling.
The experimental tests were carried out with lithium bromide – water solution with a constant concentration (53 % weight) and a constant heat source of 3 kW. Plots of mass flow against absorbed heat are shown for both modes. The absorbed heat into the connected generator in pool boiling mode was 34% upper in comparison with the falling film mode. Also, the falling film mode was evaluated with a recirculation solution, into the generator with a 33% of rise in the absorbed heat.
The best results were obtained as pool boiling mode, because the area of contact between the working solution and the heating water was bigger than falling film mode, and absorbed heat increases with recirculation solution.
Presented Monday 17, 13:30 to 15:00, in session Environmental Protection & Sustainability (EPS - Poster) S-7P.
