1. Introduction
1) Definition of preservation and food-spoilage micro-organisms
Food preservation is the process of treating and handling food to stop or greatly slow down spoilage (loss of quality, edibility or nutritive value) caused or accelerated by micro-organisms. Some methods, however, use benign bacteria, yeasts or fungi to add specific qualities and to preserve food (e.g., cheese, wine
heat sensitive areas, and when organic solvents are not feasible. In areas such as the bloodstream, a pressure difference would rupture blood cells. Dialysis is not a function of pressure; therefore a pressure difference is not needed.
By far the most important application of dialysis is the therapeutic treatment of patients with renal failure. The technique is called hemodialysis and attempt
이중관 열교환기의 특징.
저온 유체가 고온 유체로 어떤 유체의 온도를 낮추거나 높일 목적으로 사용하는 장치를 열교환기라고 한다. 이중관 열교환기(double-pipe heatexchanger)는 원관을 이중으로 한 것이며, 안쪽 관에 한 유체가 흐르고, 두 관 사이로 다른 유체가 흐르도록 되어있다. 이중관 열교환기는
Portable Device
Light & Thin
Emitted heat temperature
35 ~ 40 ℃
Operation Temperature
Frequently used
Speed
↓
These factors must be considered when designed
High Volatility
High Specific heat
Fluid
This cycle is repeated
‘Phase Change’ makes
Heatexchange
‘Thin Layer’ maintaines
this system
This cycle is repeated
Interaction with
Fluid & wall
+
Minia
【이 중 관 열 교 환 기〔Double pipe heatexchanger〕】
1. 실험 목적
이중관 열교환기를 이용하여 열수지를 이해하고 유체의 유량과 총괄 전열계수와의 관계를 검토해 총괄 전열계수의 개념을 이해한다. 또한 이중관 열교환기의 올바른 사용법을 익히고, 경막전열계수, 유체의 온도 변화, 열교환기 효