![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
ABSTRACT
In this article, studies are made on frost formation and flow over a fin and tube heat exchanger due to natural convection for various conditions of relative humidity, air ambient temperature, and mean refrigerant temperature. The results include frost deposition, steps of frost formation, and its effect on heat transfer rate for different conditions. The results show that frost is formed only on the tip of the fins with higher thickness from top to bottom due to small distance between the fins. Frost causes to trap the air which increases the thermal resistance and reduces heat transfer in the system.
Nomenclature
| cp | = | Specific heat capacity (J kg−1 K−1) |
| q | = | Heat transfer rate (W) |
| RH | = | Relative humidity |
| T | = | Temperature (K) |
| t | = | Time (s) |
Greek letters
| δ | = | Frost thickness (mm) |
Subscripts
| a | = | Air |
| f | = | Frost |
| Ref | = | Refrigerant |
| m | = | Mean |
Additional information
Funding
This work is supported from Iran’s National Elites Foundation.