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Impact of Limescale on Home Appliances in a Building
Published in Salah-ddine Krit, Mohamed Elhoseny, Valentina Emilia Balas, Rachid Benlamri, Marius M. Balas, Internet of Everything and Big Data, 2021
Hajji Abdelghani, Ahmed Abbou, El Boukili Abdellah
The technological and economic consequences of scaling are varied: Loss of efficiency due to the insulating power of limescale, which increases the energy consumption (10 mm of limestone on the electrical resistance can increase losses up to 50%). [ASPEC SERVIGAZ, (n.d.)]Shortening of the life of the already expensive equipment.Rise in the temperature of the appliances with the risk of destruction by overheating.The malfunction of the hydraulic devices.A progressive reduction of the pipe sections with an increase of pressure losses or even their obstruction.In addition, tartar in large quantities is an agent promoting the development of certain bacteria such as Legionella. [Hadfi, 2012]
Study of the Effect of Fin-and-Tube Heat Exchanger Fouling on its Structural Performance
Published in Heat Transfer Engineering, 2018
The failure of the heat exchanger shown in Figure 1 occurred mainly due to the presence of a fouling deposit inside several tubes. Figure 3 presents the insight into the heat exchanger failure. As one can observe, the boiler scale (limescale) deposit is present in several tubes. Since the heat transfer conditions were improper, thus the tube and fin temperature was high, what increases the possibility of its failure (overheating, corrosion, extensive fouling, tube buckling, and finally the tube fracture). It is evident that the water, which was flowing through the heat exchanger tubes, had not been adequately treated (softened). As it is widely known, the fouling inside tubes are usually caused by the flow of raw water. Hence, the occurrence of extensive thermal loads [15] resulted in high-value of thermal stresses (therefore the heat exchanger crashed).
Comparison of Individual Air-Side Row-By-Row Heat Transfer Coefficient Correlations on Four-Row Finned-Tube Heat Exchangers
Published in Heat Transfer Engineering, 2023
Mateusz Marcinkowski, Dawid Taler, Jan Taler, Katarzyna Węglarz
If an experiment cannot be completely replaced, then only part of the results can be verified [10]. Joseph et al. [11] used CFD modeling to predict performance for a wire-net compact HEX. The following paper used CFD modeling to show the effect of FTHE fouling on its structural performance. The authors demonstrated that the silicate limescale fouling layer could significantly increase the tube wall temperature [12]. Numerical simulations of the thermal performance of cryogenic compact HEXs with serrated-find ducts are presented in [13].