Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
COMMERCIAL DRINKING-FOUNTAIN EXPERIMENT, BASED ON ABNT NBR 16236
Submission Author:
Matheus Garros , SP
Co-Authors:
Matheus Garros, Robson Leal da Silva
Presenter: Robson Leal da Silva
doi://10.26678/ABCM.ENCIT2022.CIT22-0695
Abstract
This paper analyzed a commercial drinking-fountain, based on ABNT NBR 16232 to validate its sheet information, using an experimental and computational approach. In the experiment, a small structure was constructed, and two thermocouples measured the reservoir and water feeding temperatures. An Arduino sensor measured the temperature in the outlet of the expansion device and in the compressor outlet, to collect data for the simulation. The computational simulation used natural refrigerants such as R290, R600a, R744, and R717 as substitutes for R134a. The open-source software DWSIM executed the simulations. The conclusion was a disagreement between the sheet information and the experimental results: The information in the sheet (6 L/h) was not obtained in a test similar to the one proposed by the standard. The computational approach confirms that R290 and R600a are candidates for the drop-in of R134a, without compromising the COP or the system design (pressures and temperatures). A combination of experimental and simulation data showed the poor design of the heat-transfer evaporator-reservoir, with a very low heat transfer effectiveness (0,04).
Keywords
energy, drinking-fountain, GWP, Hydrocarbons, HFC
