Abstract
This study presents methodology developed to experimentally determine the entropy generated by mechanical steam compression refrigeration systems, based upon applying the first and second laws of thermodynamics. The methodology was applied to an experimental refrigeration system that operates with refrigerant R-134a, and which is equipped to measure pressures and temperatures of the refrigerant in the inlet and outlet of every system component (evaporator, condenser, compressor and expansion valve). The experimental results reported represent cooling of a mass flow of water at 0.5L/s. The total mean entropies generated were of the order of 0.0144 kW/K. These generated entropies caused losses of energy of 93% of the power input, which indicate that energy use in this refrigeration system is far from being considered efficient.
| Translated title of the contribution | Experimental results on the entropy generated by refrigeration systems |
|---|---|
| Original language | Spanish |
| Pages (from-to) | 75-82 |
| Number of pages | 8 |
| Journal | Informacion Tecnologica |
| Volume | 14 |
| Issue number | 1 |
| State | Published - 2003 |
| Externally published | Yes |