Abstract
The physical model and mathematical model of solar refrigeration and desalination co-generation system were established. The performance and economy of the system were analyzed by changing the three variables of refrigeration capacity, seawater desalination effects number and three different cities. The results show that increasing refrigeration capacity is conducive to improving freshwater production and increasing freshwater efficiency, but more auxiliary heat consumption is needed, the comprehensive effect is to shorten the recovery period. Increasing desalination efficiency is conducive to increasing freshwater production and freshwater efficiency, and the auxiliary heat consumption remains unchanged. The comprehensive effect is to shorten the recovery period. Solar energy is the main energy needed in the co-generation system of the three cities, and Shenzhen has the largest proportion of energy supply, which reaches 67.8%. Compared with the solar refrigeration system, the recovery period of the co-generation system can bu shortened by 18.1%.
Highlights
With the rapid development of society and economy, freshwater resources are an economic problem, and a social problem related to human survival and development
Most coastal cities have less than 500 cubic meters of fresh water per person, which is lower than the international bottom line of 1000 cubic meters per person, while Dalian, Qingdao and other cities have less than 200 cubic meters per person of fresh water resources, which is in a serious water shortage situation[1].The development of seawater desalination technology will become an effective strategic way to solve the shortage of freshwater in China
Solar absorption refrigeration technology uses solar energy collected by solar collector to drive absorption refrigeration system, which is the most widely used solar refrigeration model so far
Summary
With the rapid development of society and economy, freshwater resources are an economic problem, and a social problem related to human survival and development. Most coastal cities have less than 500 cubic meters of fresh water per person, which is lower than the international bottom line of 1000 cubic meters per person, while Dalian, Qingdao and other cities have less than 200 cubic meters per person of fresh water resources, which is in a serious water shortage situation[1].The development of seawater desalination technology will become an effective strategic way to solve the shortage of freshwater in China. Solar refrigeration seawater desalination co-generation system is a new technology, which can desalinate seawater by recovering condensation heat and obtain certain fresh water benefits. The physical model and economic model of the combined system of solar absorption refrigeration and desalination with vacuum tube collector are established, and the characteristics of the new system are simulated and analyzed, which provides a reference for the operation of practical projects
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