冷庫實行節能運行的實時控制任務,可由數據釆集、計算控制和監控系統來完成。數據采集計算控制系統的采集對象是制冷裝置、制冷系統和工作環境的所有相關參數,類別有溫度、壓力、壓差、液位、電流、運行狀態和故障情況等內容。
The cold store implements the real-time control task of energy saving operation, which can be completed by data acquisition, computation control and monitoring system. The acquisition objects of the data acquisition and calculation control system are all the related parameters of the refrigeration system, the refrigeration system and the working environment, including temperature, pressure, pressure difference, liquid level, current, running state and failure condition.
電子膨脹閥的釆用,可節能10%;按需融霜功能,可節能5%;夜間回置的庫溫設定,可節能4%;冷風機風扇運行控制,可節能3%;冷庫門防結露絲控制,可節能2%;壓縮機組和冷凝風扇控制,可節能10%。以上6條措施的綜合節能效果,可達15~34%。
The use of electronic expansion valve can save energy by 10%, energy saving 5%, energy saving at night, energy saving 4%, cooling fan fan operation control, energy saving 3%, cold storage door anti knot Ruth control, energy saving 2%, compressor unit and condensing fan control, energy saving 10%. The comprehensive energy saving effect of the above 6 measures can reach 15 to 34%.
能量調節使壓縮機的制冷量能隨熱負荷的變化而變化,是冷庫節能自動控制的重要內容之一。不同的制冷壓縮機或制冷機組,實施節能運行和能量調節的側重點也有所不同。
Energy regulation makes the refrigerating capacity of compressor change with the change of heat load. It is one of the important contents of automatic control of cold storage energy saving. Different refrigeration compressors or refrigerating units have different emphasis on energy-saving operation and energy regulation.
設定壓縮機運行制冷量時,避免其低能效比的運行范圍;對運行工況變化范圍較大的制冷系統,實行內容積比自動調節;對于帶經濟器運行的螺桿機,探討實施經濟器運行工況的自動調節。
The operation range of low energy efficiency ratio is avoided when the compressor operation cooling capacity is set, and the content product ratio is automatically adjusted for the refrigeration system with large range of operating conditions, and the automatic adjustment of the operating condition of the economy is discussed for the screw machine running with the economy.
減少以某臺壓縮機工作的氣缸數為能量調節單元的做法,避免活塞的無功運行,亦避免降低壓縮機C0P值的運行;采用變頻技術,實現能量無級調節,在改善運行工況中節能。
Reducing the number of cylinders working in a compressor as an energy adjustment unit, avoiding the reactive power of the piston, and avoiding the operation of the C0P value of the compressor; using frequency conversion technology to realize the energy stepless regulation, and to improve the energy saving in the operation condition.
變頻技術用于壓縮機能量調節是目前較為流行的方法之一。變頻過低,會造成油壓差降低和油量減少的缺點;變頻過高,會增加油循環量和消耗量,還會使壓縮機閥門故障增加。變頻驅動還應注意其電機應按最大功率選擇。
Frequency conversion technology is one of the popular methods for compressor energy regulation. The low frequency of frequency conversion will cause the shortcoming of the oil pressure difference and the decrease of oil quantity; high frequency conversion will increase the oil circulation and consumption, and will also increase the failure of the compressor valve. The frequency conversion drive should also be noted that the motor should be selected according to the maximum power.
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