EXPERIMENTAL INVESTIGATION OF THE BUBBLE PUMP OF A SINGLE PRESSURE ABSORPTION REFRIGERATION SYSTEM UNDER THE EFFECT OF PRESSURE AND AMMONIA CONCENTRATION

2016 ◽  
Vol 47 (8) ◽  
pp. 767-780
Author(s):  
Keng Wai Chan ◽  
Malcolm McCulloch
Keyword(s):  
Experimental Investigation ◽  
Ammonia Concentration ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Effect Of Pressure ◽  
Absorption Refrigeration System ◽  
Bubble Pump

scholarly journals Design and construction of a low capacity pump-less absorption system

2014 ◽  
Vol 18 (2) ◽  
pp. 577-590
Author(s):  
Hamed Monsef ◽  
Naghash Zadegan ◽  
Koroush Javaherdeh
Keyword(s):  
Electrical Power ◽  
Solution Concentration ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Absorption System ◽  
Horizontal Tubes ◽  
Mechanical Pump ◽  
Absorption Refrigeration System ◽  
The Cost ◽  
Bubble Pump

In this investigation, a low capacity absorption system has been designed and constructed where the mechanical pump has been replaced with a bubble pump, reducing the cost and eliminating the electrical power. Initially, a test rig bubble pump has been built with a single Pyrex tube to test the effect of different parameters on pumping flow rate. An absorption refrigeration system with a capacity of 2.5 kW has been designed and constructed. Results have shown that a bubble pump with five horizontal tubes with 2.5 mm diameter and submergence ratio of 0.4 has the best performance for this low capacity absorption refrigeration system. The COP of this structure was about 0.51 and mathematical modeling shows that increasing the solution concentration at generator outlet decreases the COP of the system.

Experimental Study on Ammonia-Water Bubble Absorption in External Magnetic Field

2011 ◽  
Vol 291-294 ◽  
pp. 1653-1656
Author(s):  
Wei Dong Wu ◽  
Zeng Yang Li ◽  
Sheng Xiang Chen ◽  
Si Mei Liu
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Ammonia Concentration ◽  
Absorption Refrigeration ◽  
Magnetic Intensity ◽  
Strengthening Mechanisms ◽  
Refrigeration System ◽  
Ratio Increase ◽  
Absorption Refrigeration System ◽  
The Magnetic Field

Absorber is a key component of absorption refrigeration system, in which there is a complicated heat and mass transfer. To improve the performance of absorber, the magnetic field was used as a enhancing way, the experiments of NH3/H2O bubble absorption in magnetic field were carried out. The results showed that the NH3/H2O bubble absorption can be strengthened by the magnetic field. Both AR(absorption rate) and EAR(effective absorption ratio) increase with the increase of magnetic intensity within the range of 0~280mT. The EAR is always higher than 1 when the external magnetic field exists. The EAR reaches the maximum 1.069 when the initial ammonia concentration is 20wt% and the magnetic intensity is 280mT. The primary strengthening mechanisms are also explained.

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