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- Title
Experimental Study on Ammonia Finned Air-Coolers Working under Frosting Conditions.
- Authors
Dumitrescu, Rodica; Ilie, Anica; Girip, Alina; Nichita, Madalina Teodora; Filip, Alina
- Abstract
This paper reports experimental data obtained for an ammonia air-cooling evaporator working under conditions of frost formation. The experimental study was carried out on a specially designed set-up that allowed measuring, control and acquisition of data. Experiments were conducted for ammonia evaporation temperature of -18C and -10 C and cooling capacity from 7.6 kW to 18.3 kW, during steady state operating conditions. The experimental investigation aimed to determine the effect of frost formation and growth on thermal performances of the ammonia finned air-cooler, in time, under different operating conditions. Influence of air dry bulb temperature, air humidity ratio and evaporating temperature has been studied. Air side pressure drop, for the same dry bulb temperature and different humidity air ratio has also been studied. This experimental investigation on an ammonia air-cooling evaporator addresses the current issue of energy savings by assisting improved design of this type of heat exchangers in order to achieve higher thermal performances of evaporators and refrigerating systems. By using ammonia as a refrigerant, this experimental investigation addresses also current ecological issues linked to refrigerants. It is well known that apart from its attractive thermo-physical properties, as compared to HFCs, ammonia is also an environment friendly natural refrigerant, known for its zero ozone depleting potential and zero global warming effect.
- Subjects
EVAPORATORS; HEAT transfer; ENERGY conservation; ACQUISITION of data; REFRIGERATION &; refrigerating machinery
- Publication
Romanian Journal of Civil Engineering / Revista Română de Inginerie Civilă, 2016, Vol 7, Issue 3, p252
- ISSN
2068-3987
- Publication type
Article