EXPERIMENTAL RESEARCH INSIDE A GAS HEATER WITH DIFFERENT INTERMEDIATE HEAT CARRIER MEDIUM
The gas heater is one of the key equipments in gas industry, which plays the role of heating natural gas to the required processing temperature, and the application of gas heater shows a promising prospect. The cylindertype heating device with an intermediate heat carrier medium is most widely employed. Apparently, the selection of intermediate heat carrier medium and the form of heat transfer process of the intermediate heat carrier medium, i.e. the flow field organization in the large capacity cylinder, is the key elements that greatly affect the thermal efficiency of gas heater. A real gas heater experimental system, which is the only one in China, is built. The present paper characterizes water and ethylene glycol as the intermediate heat carrier medium. Experimental measurements and analysis on the flow condition and temperature distribution between the water and ethylene glycol in the cylinder were carried out. The results shown that using ethylene glycol as the heat carrier media can widen the application range of gas heater. The efficiency of the heater with ethylene glycol as the heat carrier medium is at least 3.8% higher than that with water as the heat carrier medium under the same working conditions. The thermal efficiency of gas heater is usually less than 87%.
Visualized experimental investigation on the natural gas heater
Based on the structure of natural gas heater,a visualized experimental system was designed in,which electrically heated air was employed without fuel combustion process.Experimental investigation and analysis on the flow condition and temperature distribution of the heat-transfer medium were carried out.A simple and effective modified structure was brought forward,the arrangement of the heating and cooling surfaces was optimized,and the heat transfer in the cylinder will be more effective.
Toward calculation of heat-engineering characteristics of two-phase thermosiphons filled with ethylene glycol II. Heat-engineering characteristics
We present experimental results obtained for the thermal and technical characteristics of two-phase thermosiphons with ethylene glycol as a heat carrier.