MAC cosmetics discount Underground source of cold

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Underground source of cold to refrigeration and air conditioning engineering research

And tap water as cooling medium contrast test to prove the economic advantage of the cold and feasibility of cooling. When the cooling water temperature rise is high, the use of spray method, in order to achieve dynamic balance of underground heat exchanger. After the experimental part of the data obtained by sorting the results shown in Figure 3,4,5. Time (h) 4 laps summer, autumn and cold meat in cold storage shed Ju-l 5, the cold pheasant and circle curve unsolicited library-l timber cooling down cooling contrast curve of 20 * 2 / 1997 we can see from Figure 3: cooling pond heat transfer is essentially an unstable process. Refrigeration unit is running, the water in and around the formation temperature is almost equal to the lower condenser water temperature, cold storage and rapid cooling; when the cooling water would be too much into the cooling condenser tropical pool, and near the soil time to heat the distance quickly this transmission, the cooling water temperature increased slightly. Cooling rate of decline in ground water and increasing the temperature difference between the fork to speed up the flow of heat transfer in deep geological formations. Finally, the condenser cooling water away from the heat and transfer heat to the diving layer of soil to reach a new dynamic equilibrium, resulting in a stable temperature of cooling water temperature of trespassing, until the cold storage temperature to adjust the value. Autumn, cooling system heat load was significantly lower than in summer, so cold storage temperature drop quickly, the device is running 12h, can meet the design storage temperature (a 15C), while the summer will have to run for 24 hours, storage temperature can be close to the design value. Increase the depth or control of the cooling pond can be installed to further increase the fin heat transfer, speed up the library in summer the temperature drop. Figure 4 shows that: refrigeration unit is running,[link widoczny dla zalogowanych], because water temperature is lower than water, so use cold water loop temperature drop quickly, as the cooling water temperature, cooling rate began to fall gently; water inlet temperature remained almost unchanged the library more uniform temperature drop, both run by the l2-hour, all can meet the design good at storage temperature by cooling water circulating indicating water cycle is feasible to replace the ideal cooling method. § chopsticks O4Sll162024 time (h) 6 cooling water and the unsolicited ring of wood into and out of poor contrast condenser ju _) Velvet q Figure 5 shows, the use of the cold refrigerant, when the cooling water and ground heat exchange to achieve dynamic balance, the summer out of the water in the condenser temperature stability of about 2.9 ~ 3.0C in autumn, stable at 3.8 ~ 3.9c, while the use of water as a cooling medium, and out of the water temperature is about 4.2 ~ 4.5C. This shows that the latter is condensed in the heat exchange capacity than the former. This made us to the best of cold refrigeration cooling pond design requirements in order to increase the cooling capacity. IV, Conclusion 1. Stable underground cooling pond cooling capacity can be in different seasons, under different conditions the long-term, safe and efficient use. Appropriate increase in the cooling of the depth, especially increasing the length of the cooling discharge tubes or install cooling fins, heat transfer can increase the cooling pool. . 2. Cold refrigeration can be used to replace traditional fiberglass cooling towers and pumping of groundwater for cooling the refrigerant cycle. Because it no longer needs the cooling towers, fans and a considerable amount of water, so the infrastructure investment, operation and maintenance costs can be significantly reduced, the same 2F10 refrigeration compressor unit, water, etc. The average annual savings of about 25,000, and can eliminate the water pollution,[link widoczny dla zalogowanych], decreased fan noise and formation damage, the social benefits are obvious. 3. Building materials as cement, steel underground tank at least up to 2O years of life, and the aging cooling tower easy to rattle, the service life of only about 5 years 4. Underground cooling pond can be combined with the green top can take a vintage, around planting flowers, trees, heaps rockery, built water gardens, landscaping. To sum up, the cold set of energy saving refrigeration, economy, low noise, anti-drop formation and landscaping in one. Experimental studies have shown that to develop the cold cooling is feasible and has important practical value. In this experiment, cooling pond underground laboratory has been officially auxiliary air conditioning system for the cold source. References (1] J, R. WeltytEngineeringHeatTransfer, OregonstateVniversity.1981 (2] W, F.stoecker, IndustrialRefrigerationTroy, Michigan1988 [33 Lu Xun soil. Han Houde, auxiliary ships science, Science Press 1995 (4] Zhang Zhi Hu, refrigeration principles and equipment , Mechanical Industry Press Du 1991 [83 Shaobo. Shanghai from picking the environment, science and technology literature published in DU in 1989 [6] Han Tak. LU soil hoon, etc.,[link widoczny dla zalogowanych], marine a number of cold storage refrigeration equipment and automatic control system of Shanghai Maritime University,[link widoczny dla zalogowanych], 1992 Phase 2 / 21 * 1997 Refrigeration

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