Translated Abstract
With the rapid development of our country, industrial electricity consumption and commercial usage increase sharply. Although China‘s installed electric capacity has increased, the allocation of power resource still has many problems,such as seasonal, regional, inherent, and many other problems. As an important adjusting measurement, cool storage technology has the characteristic of less investment and higher efficiency. It can effectively slow down the power tense and is beneficial to the sustainable development of our country. Therefore, the development of cool storage technology is of great significance in resources allocation optimizing and China‘s economic development.Gas hydrate cool storage technology has the advantage over other three (water, ice and eutectic salt) cool storage technology, for example, the appropriate phase change temperature (within the temperature of (5~12) ℃, the conventional air conditioning unit can run under high efficiency without replacement), higher latent heat with phase changes, larger density(can arrange cool storage material with small containers), higher heat exchange efficiency. So it is considered as the most improtant method of cool storage technologies in the 21st century. Thus, developing hydrate cool storage technology has great significance.Decomposition heat (cool storage density) is an important indicator of the evaluation of cool storage technology. Its value represents the strength of the hydrate cool storage capacity. Therefore, in this work,we picked the refrigerant gas hydrate as research object, especially for the decomposition heat (hydrate storage density ), the main works in this thesis include:1. Development of the experimental apparatus: The original reactor was modified and the measuremental apparatus was built. The system consists of reactor, temperature measurement system, pressure measurement system, vacuum system and computer data acquisition system .2. Saturated vapor pressure measurement of refrigerant and experimental system was tested. The thermometers, pressure sensors and digital multimeters have been tested, the error meets the test requirements. Saturation vapor pressures of R141b, R134a and R152a were measured with the new experimental apparatus at the temperature range from 273.15 K to 289.15 K. Compared with the data in the literature, the error is acceptable. So the reliability of the experimental device was confirmed.3. Refrigerant gas hydrate phase equilibria measurement and decomposition heat calculation: Hydrate - refrigerant gas-water phase equilibrium data of 10% and 20% mass fraction of R141b gas hydrate and R134a, R152a refrigerant gas hydrate were measured with an equal volume way. According to Clausius-Clapeyron equation , these three hydrate dissociation heat were calculated. No hydrate formation is observed after 48 hours hydrate quickly generate test with two new refrigerants R1234yf and R1234ze.KEY WORDS: Refrigerant Gas Hydrates Cool Storage Phase Equilibrium Decomposition Heat TYPE OF THESIS: Application Fundamentals
Translated Keyword
[Refrigerant Gas Hydrates Cool Storage Phase Equilibrium Decomposition Heat]
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