Study On The Exergy Analysis Of Photosynthetic Biological Continuous Hydrogen Production System

This paper is a research supported by the National Natural Science Foundation which named the study on micro straw from biomass of photosynthetic continuous hydrogen production and metabolic heat of the process(No.50676029),and the National plans of 863 program which named the study on the operation performance of photosynthetic biological hydrogen production system in midsize(No. 2006AA05z119).With the low-carbon economy has become the theme of World Environment Day and the convening of the Copenhagen Climate Conference, rational use of energy and enhance energy efficiency in all aspects of management has become the effective measures responding to lower energy consumption, improve energy efficiency and energy shortages and environmental pollution. China's future sustainable development will also be the basis and the only way to change the traditional mode of economic growth, vigorously promote energy conservation and development of low-carbon economy.This paper is on the basis of the second law of thermodynamics to exergy analysis, as the research object to the continuous hydrogen production from solar energy system which develop by the Ministry of Agriculture Key Laboratory of Renewable Energy Development. By analyzing the energy flow process through various parts of the system the input and output, established of exergy analysis models and exergy balance equation, analysis and calculation of the system exergy efficiency, exploratory proposed the weaknesses in the internal use of energy efficiency and low energy production means running in the photosynthetic biological continuous hydrogen production system. In order to improve the available energy in continuous hydrogen production from solar energy systems, reduce consumption of conventional energy systems, speed up the development process in the continuous hydrogen production from solar energy systems has important practical significance.The result shows that:(1) by analyzing the various energy inputs and outputs, established model of exergy analysis according to the characteristics of the system;(2)established exergy balance equations in the continuous biological hydrogen production from solar energy system, and carry out that the exergy efficiency was 21.99%, the light exergy loss was the most loss of the total system, which account for 23%; (3) analysis of the main factors of light conversion in the continuous hydrogen production from solar energy systems, including solar hydrogen production characteristics of microorganisms on the selective absorption of wavelengths, light intensity of the light saturation effect and the culture medium of self-shadowing effect of light energy conversion rate and other factors, and the corresponding solution.Improving on the aspects in system and the utilization of the effective energy, providing a science reference for the process of the industrialization in the photosynthetic biological hydrogen production system.