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Solar energy is recognized as the future of mankind the most appropriate and safe, the most green, the best one of alternative energy sources, with access to convenient, great energy, no pollution, safety and good. According to information, China is a country rich solar energy resources, two thirds of the region is greater than the total annual radiation 5020MJ/m2, development and utilization of solar energy has great potential. Use of solardriven airconditioning system on the one hand can greatly reduce nonrenewable resources of energy and electricity consumption, on the other hand due to lower power consumption reduced by the burning of coal and other conventional fuels in power generation caused by environmental pollution, is the current of air conditioning and refrigeration technology hot. Overview of solar energy development Since the 70s of the 20th century by the oil crisis, many countries have increased support for renewable energy. Solar energy technology advances, research has been expanding, and achieved some of the more important results, such as pound parabolic concentrator mirror collector, vacuum tube solar collector, amorphous silicon solar cells, solar thermal power generation, such as photocatalytic hydrogen evolution. Held in Brazil in 1992, the United Nations World Environment and Development, the meeting adopted the Rio de Janeiro Declaration on Environment and Development, Agenda 21 and a series of important documents. After 1992, the world39。s solar energy has entered a period of development, characterized by use of solar energy and sustainable development and environmental protection in the world closely and focus on scientific and technological achievements into productive forces, the development of solar industry, expanding solar power and size. Since 1996, the rapid development of the world39。s photovoltaic power generation, solar cell output by 30% to 40% of the annual growth rate of the rapid development of increasingly wide range of applications, the 2000 World PV cell production reached , about halffor sun roof and the grid system. Use of solar thermal conversion of optical ─ Study of Refrigeration SystemSolar thermal conversion refrigeration, first of all is the solar energy into heat energy, reuse heat as the external pensation to achieve the purpose of cooling. Light ─ thermal conversion of refrigeration mainly from the following directions, namely, solar refrigeration, solar refrigeration, solar desiccant cooling, solar vapor pression refrigeration and solar steam jet refrigeration. One solar absorption refrigeration has entered the application phase, the solar adsorption refrigeration is still in the pilot study stage. Study of solar absorption refrigeration. Solar absorption refrigeration of the closest to practical use, its most general configuration is: The collector to collect solar energy, used to drive a single effect or twostage doubleeffect absorption chiller, mainly lithium bromide working pair water, when solar energy is insufficient fuel or coalfired boilers can be used to carry auxiliary heating. System is mainly ordinary form and the absorption refrigeration system is basically the same, the only difference is the heat source is solar energy generator office instead of the usual hightemperature steam generated by heating boilers, hot water or heat sources such as hightemperature exhaust gas. Solar adsorption refrigeration. Solar adsorption refrigeration system, refrigeration is the use of adsorption bed of solid adsorbent refrigerant periodic adsorption, desorption process of refrigeration cycle. Solar adsorption refrigeration system consists of solar adsorption collector, condenser, liquid receiver, evaporator, valves, etc. Commonly used adsorbent refrigerant working fluids that have activated carbon methanol, activated carbon ammonia, calcium chloride ammonia, silica gel water, metal hydride hydrogen. Solar adsorption refrigeration system, a simple structure with no moving parts, noise, without regard to corrosion, but also by its cost and operating costs are relatively low. The basic principle of absorption refrigerationThe basic principle of absorption refrigeration generally be divided into the following five steps. (1) the use of the work of the heat source (such as steam, hot water and gas, etc.) in the generator heat from the absorber by the solution pump to transport solution with certain concentration, and to the solution of most of the low boiling point refrigerant evaporated out. (2) refrigerant vapor into the condenser, the cooling medium has been condensed into liquid refrigerant, and then by cutting Buck to the evaporation pressure. (3) by throttling the refrigerant into the evaporator, absorbing heat from the cooling system has been aggravated into the evaporation pressure of refrigerant vapor. (4) occurred in the generator A, the process through the remaining solution (a small amount of high boiling point of the absorbent and refrige