http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Zisheng Wang (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
FRED T. ISHUGAH, RUZHU WANG,LIWEI WANG,ZISHENG LU 대한설비공학회 2014 International Journal Of Air-Conditioning and Refr Vol.22 No.2
This study aimed at analyzing different operation strategies to improve the performance of anew type adsorption chiller employing a novel composite adsorbent, silica gel impregnated withlithium chloride, paired with methanol as the adsorbate. The chiller's experimental test resultsshowed an average Specific. Cooling Power (SCP) and Coeffient of Performance (COP) of286 W/kg and 0.48, respectively. This was when the average hot water inlet temperature,cooling water inlet temperature, and chilled water inlet temperature were 83C, 26C and 15C,respectively. In addition, the corresponding mass flow rates were 0.22, 0.39 and 0.09 kg/s, respectively. Despite the fact that the average SCP and COP, were rather satisfactory, analysis ofexperimental results conducted with different cycle times, inlet hot water temperatures, and hotwater flow rates showed that a much better performance could be achieved. Experimentalresults indicated the following: (1) the COP increased while the SCP decreased with increasedcycle time, (2) both the COP and the SCP increased with increase in heat and mass recoverytime to an optimal time then started to decrease as heat and mass recovery time increasedbeyond the optimal time, (3) both the cooling power and COP generally increased with increasein inlet hot water temperature at a relatively higher value from 60C to about 90C beyondwhich the incremental value started diminishing, and, (4) increase in mass flow rates producedhigher cooling power with decreased COP while decrease in mass flow rates of hot water producedlower cooling power with increased COP. This paper therefore recommends an adsorption/desorption time, heat and mass recovery time, inlet hot water temperature, and hot watermass flow rate of 780 s, 60 s, 83C, and 0.22 kg/s as appropriate to give the best chiller performancefor refrigeration.
-
Separation of Taxanes from Taxus canadensis Using Dynamic Pressurized Liquid Extraction
Yuheng Wang,Joanne Gamage,Zisheng Zhang 한국생물공학회 2011 Biotechnology and Bioprocess Engineering Vol.16 No.4
An extraction technique, dynamic pressurized liquid extraction (DPLE), was proposed to extract the taxanes; including 10-DAB III, Baccatin III, 9-DHB III and paclitaxel, from powdered Taxus canadensis needles. A dual-solvent approach was adopted in which the impurities were firstly removed by extraction with hexane,and the taxanes were subsequently extracted with an appropriate solvent. The performance of chloroform, dichloromethane,and mixtures of methanol/dichloromethane was compared for use as the taxane-extracting solvent, and it was found that solvents containing a higher proportion of methanol had higher extraction capabilities. The effect of temperature on DPLE extraction of the taxanes was also studied, and it was found that higher extraction efficiencies could be realized with increasing temperature up to a threshold of 90℃. Based on a progressive conversion model, a kinetic equation for the extraction process was proposed. This model successfully confirmed that smaller needle powder particle sizes would result in higher extraction rates, which is consistent with the data obtained by experimentation.
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
