Thermodynamic Analysis of Activated Carbon–Ethanol and Zeolite–Water Based Adsorption Cooling Systems
The present study focuses on the thermodynamic analysis of zeolite–water and activated carbon–ethanol based adsorption cooling systems. The performance of the system depends critically on four operating temperatures namely maximum desorption temperature, minimum adsorption temperature, condensing temperature, and evaporating temperature and also on the ratio of specific heat of structural material and the specific heat of adsorbent. Dubinin–Astakhov equation is used to estimate the equilibrium uptake of working pairs. A comparative study is made between these working pairs for the air-conditioning applications.
Corrosion and protection of the underwater steel structures for W114A platform were investigated.The offshore platform has been in service in the South China Sea for 15 years.It was found that the bio-fouling was serious and the maximum attachment thickness was 20cm,while,the cathodic protection system was normal and the protective effect was favorable.After analyzing the detective methods and their results,some problems were found.The program of potential detection was inappropriate,the detection method for physical size of the sacrificial anodes was inaccurate,and the base surface of the thickness measurement points was not clean;therefore,the cathodic protective effect could not be accuraely evaluated.To solve these problems,some valuable suggestions are put forward accordingly.