흡수식 냉동기에 사용되는 이온성 액체의 작동유체로서의 응용

We first report application of ionic liquids to working fluids used in an absorption chiller. [bmim][BF4]+TFE and [bmim][Br]+TFE mixtures were chosen as a potential working fluids to overcome serious disadvantages of the conventional working fluids. Vapor pressures were measured by using the boiling point method in the concentration range of 40 to 90 ionic liquid mass percent and correlated with an Antoine equation. Heat capacity measurements of each pure ionic liquid were carried out in the temperature range of 293.15 to 323.15K and correlated with an simple polynomial equation. Resonable agreements were obtained between calculated and experimental values. Br anion was found to be better than BF4 in the aspect of the affinity with TF

저압과 상압에서 Trifluoroethanol + Quinoline 계의 기액상평형

Vapor-liquid equilibrium for 2,2,2-TFE + quinoline system was measured at 100,400, and 760 mmHg. The compositions of the vapor and liquid phase samples are determined using GC. A thermodynamic consistency test was applied to the experimental data. Thermodynamic consistency was also confirmed

제5회 충남 협동조합 연구포럼 '생활협동조합의 정체성과 지역사회 기여' (김기섭,박승옥)

1. 생협의 태동 생협이 본격적으로 이 땅에 뿌리내리기 시작한 지도 어언 30여년이 지났다. 한 세대가 흘러간 지금, 이제는 한 번쯤 우리가 생협을 왜 했는지, 생협을 통해 무엇을 이루려 했는지 되돌아볼 필요가 있다. 과거를 들추는 것이 부질없는 일인지는 몰라도, 이를 통해 우리나라 생협운동이 지녔던 정체성에 대한 이해와 당면한 과제를 해결해나갈 방향을 찾는 데 유용할 것이라는 작은 기대를 모아본다. 생협이 태동한 1980년대는 매우 다이내믹한 격동기였다. 60년대 이후 우리나라는 연평균 7~9%에 달하는 높은 경제성장을 이루었고, 그 결과로 국민 대다수의 생활은 물질적 풍요를 구가할 수 있었다. 한 마디로 물질이 개벽한 것이다. - 이후 생략￭[제1주제]우리나라 생협운동의 정체성과 과제 (김기섭 파프리카 인터내셔널 대표) 1.생협의 태동 2.생협의 특징 3.생산자와 소비자가 만났다 4.생산자와 소비자가 직접 만났다 5.생산자와 소비자가 직접 만나 생활재를 취급했다 ￭[제2주제]한국 협동조합운동과 국가, 지역 (박승옥 한겨레두레공제조합연합회 대표) 1.관제 협동조합 2.문제는 내면화된 부국강병과 국가주의이다 -국가주의와 협동조합운동 3.빼앗긴 인민주권을 탈환하는 운동, 협동조합운동 -국가와 민주주의, 지역공동체 4.협동조합의 정치와 국

흡수식 열 펌프에 사용되는 작동유체의 개발

학위논문(석사) - 한국과학기술원 : 화학공학과, 2001.2, [ ix, 77 p. ]The first commercial absorption heat pump was designed by Ferdinand Carré in 1851 and a United States patent was issued in 1860. An absorption heat pump refers to a group of technologies that transfers heat from low temperature to high temperature while supplying heats as an energy source. The absorption heat pump has advantages from the viewpoints of energy saving and the protection of environment. It utilizes not electrical energy but heat energy source. And it does not use CFC refrigerants and is driven at low pressure. Because of these strong points, the absorption heat pump has received growing attention in recent years. Until now, $H_2O-LiBr$ has been the most widely used working pairs for absorption heat pump system. However, they still have disadvantages such as corrosion and solubility problems despite their high efficiency. In order to resolve the solubility problem, some additives such as lithium iodide and 1,3-propanediol were added into the lithium bromide solution. Also, The 2,2,2-trifluoroethanol(TFE) and quinoline system was chosen as a new organic working pair in order to overcome the known problems of $H_2O-LiBr$. TFE acts as a refrigerant and quinoline does as an absorbent. In order to optimally design an absorption heat pump and decide whether the modified lithium bromide-based absorbents and new organic working fluid, TFE-quinoline system, are suitable as the working pair for absorption heat pump or not, the density, viscosity and surface tension measurements together with the solubility, thermal conductivity, vapor pressure and VLE data must be required. These properties were closely related to the performance of an absorption heat pump. In this study, the various properties such as the density, viscosity, surface tension, differential heat of dilution and VLE data were measured to provide the basic information for the potential use.한국과학기술원 : 화학공학과