摘要
针对目前蒸馏水器存在冷却水浪费严重现象,提出利用风扇产生冷风对冷却水降温处理达到循环冷却的目的,设计出循环式蒸馏水器,通过理论公式和试验分析确定循环式蒸馏水器最优结构和最佳工作参数。同时针对蒸馏水器蒸发锅外壁温度过高,热量损失严重,而且存在安全隐患,采用真空绝热板(vacuum insulation panel,VIP)对蒸发锅外壁隔热处理,试验研究发现采用单层VIP蒸发锅外壁温度从96降到43℃,热量损失8.12 W;采用双层VIP蒸发锅外壁温度从96降到28℃,热量损失5.32 W,相对单层VIP真空绝热板温度降低了28.3%、热量损失降低了34.5%,双层VIP真空绝热具有良好的隔热性能,可提高设备的安全性。降温装置的效果试验表明:在室温25℃、降温装置进口水温50℃的条件下,降温装置的最优结构和最佳工作参数为降温板水平角度60°、降温装置进口水流量43.3 m L/s、风扇风速6.0 m/s,降温装置出口水温为26℃,冷却水温度降低了48%,符合冷凝的要求。该研究可为蒸馏水器的改进提供结构参数和工作参数参考。
Water crisis is potentially the most serious environmental problem. Due to the enormously wasteful and therefore non-sustainable use of water, groundwater levels are decreasing at an alarming rate. The water distillation units used in almost every science laboratory, need to use water to cool the steam and thus provide distilled water. Distilled water device is a kind of equipment for preparing distilled water. With the development of science and technology, the demand for distilled water will be larger and larger. However, in terms of either energy efficiency or security, there is a certain gap between water distiller supply and social development requirement. In this paper, a new type of circulating distilled water device is designed. The device consists of 3 parts： distillation unit, cooling device and impounding reservoir, and the 3 components are connected by pipes and pumps to form a loop circulation system. The distillation unit consists of 4 parts： heater, pot of vaporization, steam pipe and condenser; double vacuum insulation panels（VIPs） are used in the heat insulation of the vaporization pot wall. The cooling device consists of 4 parts： cooling plate, fan, impounding reservoir and stainless steel casing. To decrease the temperature of outer wall of the evaporator pan, VIPs are used for the insulation of outer walls. The excellent thermal insulation properties of VIPs make them widely applied in energy conservation fields, especially in building engineering. Experiment shows that double VIPs have good insulation properties and can improve the safety of the device. Theoretical and experimental modal analysis determines the optimal structure of distilled water device and the optimum working parameters during the circulating process. The effects of temperature on cooling device are obtained mainly through accelerated testing. The optimal regularization parameters of cooling device are cooling plate＇s horizontal angle of 60°, water flow of 43.3 mL /s and fan speed of 6.0 m/s. Outlet water temperature of cooling device is 26°C, which meets the humidity requirements for forming condensation. The device is an improvement on a simple distillation apparatus. It can prevent overheating and accidents effectively. All of the needed components and appliances can be readily bought from the market. It is simple to manufacture, low in cost and dependable in its functions. In this article, the distilled water device is designed as a circulation system, and various structural parameters of cooling device are optimized. The results can provide the reference for improving the structural design of circulating distilled water device, the safety performance of the equipment, the efficient production of distilled water and hence the use of water resources.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2016年第2期64-70,共7页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金资助项目(31340032)
关键词
水
设计
降温
蒸馏水器
循环式
降温装置
真空绝热板
water
design
cooling
distilled water device
circulation
temperature reducing device
vacuum insulation panels
