| Autor: |
Abdullah H. M. AlEssa, Bassam Al-Zgoul |
| Rok vydání: |
2012 |
| Předmět: |
|
| Zdroj: |
International Journal of Mechanics and Applications. 2:1-4 |
| ISSN: |
2165-9281 |
| DOI: |
10.5923/j.mechanics.20120202.01 |
| Popis: |
In this study the Ivanova's model is modified for different values of relative humidity of the moist air in coolers. The modified model is used to analyze the process of frost accumulation on the surface of finned evaporator coils according to different values of relative humidity and mass velocity of cooled air. The thickness and mass of frost are calculated and illustrated as a function of operation time, relative humidity and mass velocity of cooling air. The results showed that the increase in mass velocity of air from 2 to 8 kg/h.m 2 caused an increase in frost thickness of 15, 13 and 10% at air with a relative humidity of 0.70, 0.80 and 0.88, respectively. Frost thickness is obtained after an operation time of 18 hours. In addition to that, it was found that increasing the relative humidity of air from 0.7 to 0.88 caused an increase in frost thickness of 50% at mass velocity of 4 kg/h m 2 for the same operation time of 18 hr. It means that the increase in relative humidity from 0.70 to 0.88 and mass velocity of air from 2 to 8 kg/h.m 2 lead to an increase in frost thickness of 65% for an operation time of 18 hr. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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