Current Volume 8
Thermodynamic Modeling and Comparison of the Properties of Refrigerant/Absorbent Pairs of a Vapor Absorption Refrigeration System (Vars)
Abstract
An absorption refrigerator is a refrigerator that uses a heat source which provides the energy needed to drive the cooling process. Technically speaking, absorption refrigerators are a popular alternative to regular compressor refrigerators where electricity is unreliable, costly, or unavailable, where noise from the compressor is problematic, or where surplus heat is available. Like the compression system, the absorption refrigerator uses refrigerant with low boiling point. When this refrigerant evaporates (boils) it takes some heat away with it, providing the cooling effect. This refrigerator uses a heat source which provides the energy needed to drive the cooling process. This work upholds that though lithium bromide is more soluble in water than in methanol, the addition of zinc bromide improved the solubility of lithium bromide in methanol. It was also discovered that NH3-H20 system has its own advantage; in that the refrigerant ammonia makes the system very feasible in sub-zero regions. The most usual combination of absorber-refrigerant pair in such system is lithium bromide-water (LiBr-H2O), where water vapour is the refrigerant, and lithium bromide, the absorbent. Other absorber-refrigerant pair that was considered is ammonia-water (Nh3-H2O). LiBr-H2O pair is most promising in chiller application due to high safety, high volatility ratio, high affinity, high stability, and high latent heat.
Keywords
Thermodynamic Modelling, Thermodynamic Properties, Refrigerant, Absorbent, Vapour Absorption Refrigeration System
Citations
IRE Journals:
K. E. Madu , A. E. Uyaelumuo , E. A. Ani , F. O. Udeani
"Thermodynamic Modeling and Comparison of the Properties of Refrigerant/Absorbent Pairs of a Vapor Absorption Refrigeration System (Vars)" Iconic Research And Engineering Journals Volume 3 Issue 10 2020 Page 193-201
IEEE:
K. E. Madu , A. E. Uyaelumuo , E. A. Ani , F. O. Udeani
"Thermodynamic Modeling and Comparison of the Properties of Refrigerant/Absorbent Pairs of a Vapor Absorption Refrigeration System (Vars)" Iconic Research And Engineering Journals, 3(10)
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