الفهرس 
Absorption Refrigeration; Hydrocarbons Refrigerants; Mixed Refrigerants; Simulation; Optimization
ContentsOnly 14 pages are availabe for public view
 |  | from | 111 |  |  |
| | | from | 111 | | |
Abstract
The performance of a mixed refrigerant absorption refrigeration cycle was studied
to explore the feasibility to achieve an ultra-low range of chiller temperatures. The use
of ethane-propene refrigerant mixtures with different compositions in combination
with a wide range of hydrocarbon solvents were simulated using ASPEN HYSYS
software. A parametric study was conducted for identifying the optimal operating
conditions for each targeted evaporator temperature. The results revealed that the
performance of the studied mixed refrigerant is generally enhanced at conditions
of low absorption temperature and/or low condenser temperature. Chiller temperature
in the range of -60 to -90 °C was revealed to be achievable using a cascade refrigeration
system with a COP in the range of (0.18 to 0.32). The optimal absorbent for most of
the studied mixture compositions, regarding maximal COP, and minimal (PP/QE), was
found to be MCC5. However, commercial solvents in the same carbon atom range
were proved to offer about the same performance at the optimal disclosed operating
conditions. The proposed system was found to achieve electrical power savings in the
range of 15-53% of that would be consumed by a VCRS for the same chiller duty and
temperature as operating under the same conditions, depending on %ethane in the
refrigerant mixture