| Title |
An Experimental Study on the Operating Characteristics of a Vertical Tube Type High Temperature Generator for Use in a Triple Effect Absorption Chiller |
| Authors |
Ki-Moon Jung ; Seong-Min Kim ; Seon-Chang Kim ; Dong-Soon Jeon |
| DOI |
https://doi.org/10.6110/KJACR.2018.30.6.275 |
| Keywords |
삼중효용 흡수식 냉동기 ; 고온재생기 ; 용액 순환비 ; 리튬브로마이드 수용액 ; 열전달계수 Triple effect absorption chiller ; High temperature generator ; Solution circulating ratio ; LiBr Aqueous solution ; Heat transfer coefficient |
| Abstract |
In this study, the operating characteristics of a vertical tube type high temperature generator for use in a triple effect absorption chiller were experimentally investigated. The test section of a vertical single tube high temperature generator was made of a stainless steel tube featuring a length of 1 m and an outer diameter of 60.5 mm. The working fluid used in this study was LiBr aqueous solution. Electric band heaters were attached to the outer surface of the test section in order to supply uniform heat flux to the test section. The inlet concentration and the temperature of the weak solution were fixed at 56.4% and 179.7℃, respectively. The effects of the heat flux and the mass flow rate of the weak solution on concentration differences, the solution circulating ratio, and the heat transfer coefficient were all investigated. It was found that the concentration difference increased and the solution circulating ratio decreased with increases in the heat flux. Under the same heat flux condition but with a lower mass flow rate of the weak solution, a larger concentration difference was found. It was also found that the averaged heat transfer coefficients for a mass flow rate of 20.1 g/s were lower than those for a mass flow rate of 14.2 g/s at each heat flux. |