| When liquefied petroleum gas (LNG) gasifies, it will release large amounts of cold energy. With the rapid growth of LNG production and sales, and global energy shortage, the prospects of LNG cold energy utilization is very broad. Sufficiently comprehensive evaluation of various projects is required in the feasibility study phase to plan LNG cold energy utilization projects. In this paper, China's current LNG cold energy utilization technology evaluation methods are studied, key elements as follows:First, this paper introduces utilization principles and utilization patterns of LNG cold energy utilization technology and proposes the main content and objectives. Analysis and evaluation methods of LNG cold energy utilization technology and research progress at home and abroad are introduced. At present there are mainly energy balance algorithm, exergy analysis, pinch analysis and technical and economic analysis method, etc. According to the status of LNG cold energy utilization in our country, in the actual evaluation, the characteristics of different utilization projects should be paid attention and we should combine a variety of methods to create a system of technical evaluation system to evaluate the upcoming construction of LNG cold energy utilization projects.Based on the above, I use technical and economic analysis method to build the LNG cold energy utilization evaluation model. According to the known data, subject to the condition such as cold energy, land, raw material supply constraints, consider the influence of economic, technic and policies to solve the model. Meanwhile, I get evaluation data such as internal rate of return and payback period.On the basis of the established evaluation model, I use C# to write computing software and design the interface accordingly. It can run in stand-alone mainstream Windows system. This software can accomplish evaluation of different LNG cold energy utilization projects. Finally, give the final score. |
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