本文選題：雙蒸發(fā)器 + 動態(tài)冰蓄冷機(jī)組��； 參考：《重慶大學(xué)》2014年碩士論文

【摘要】：我國高速增長的經(jīng)濟(jì)引起每年電力需求的急劇增加，電力供需形勢依然緊張，利用需求側(cè)管理的冰蓄冷技術(shù)可以實現(xiàn)電力負(fù)荷的削峰填谷，是緩解電力建設(shè)與新增用電矛盾的重要途徑之一。冰蓄冷技術(shù)可減少制冷機(jī)組容量，降低空調(diào)系統(tǒng)運行費用，因此，冰蓄冷技術(shù)在我國得到了越來越多的應(yīng)用。 本文在傳統(tǒng)的單蒸發(fā)器動態(tài)冰蓄冷機(jī)組的基礎(chǔ)上提出了一種雙蒸發(fā)器動態(tài)冰蓄冷機(jī)組系統(tǒng)，系統(tǒng)最主要的特點是制冰工況和冷水工況非共用蒸發(fā)器，制冰工況采用蜂窩板式蒸發(fā)器，冷水工況采用降膜蒸發(fā)器，提高了機(jī)組的制冷效率。機(jī)組可以充分利用夜間低谷電進(jìn)行蓄冰，在蓄冰冷量不能滿足空調(diào)負(fù)荷的需求時運行高效的冷水工況模式，既充分發(fā)揮了冰蓄冷空調(diào)運行經(jīng)濟(jì)性優(yōu)勢又不會導(dǎo)致系統(tǒng)裝機(jī)容量的過大。同時介紹了系統(tǒng)主要部件特點及選型設(shè)計流程。 基于GB/T10870-2001、GB/T26194-2010等相關(guān)標(biāo)準(zhǔn)研制了一種可以測試動態(tài)冰蓄冷機(jī)組和冷水機(jī)組性能的多功能性能試驗臺。提出了試驗臺的總體設(shè)計方案，試驗臺采用液體載冷劑法及機(jī)組熱平衡法。冷水工況測試采用管路兌水法，結(jié)構(gòu)簡單，節(jié)能，可快速達(dá)到測試所需工況。具體闡述了試驗臺各系統(tǒng)的設(shè)計計算。試驗臺測控系統(tǒng)精確，能夠滿足相關(guān)性能試驗標(biāo)準(zhǔn)的要求。雙蒸發(fā)器動態(tài)冰蓄冷機(jī)組試驗結(jié)果表明機(jī)組冷水工況和制冰工況下性能良好，達(dá)到了機(jī)組設(shè)計目標(biāo)。 利用傳熱學(xué)中相變傳熱的相關(guān)理論，，對雙蒸發(fā)器動態(tài)冰蓄冷機(jī)組制冰過程進(jìn)行了傳熱分析與優(yōu)化，采用一維相變傳熱模型近似分析了機(jī)組制冰蒸發(fā)板制冰過程，探討了不同制冰蒸發(fā)板制冰冷水進(jìn)水溫度下制冰厚度、制冰速率與時間的關(guān)系，以傳熱理論分析為基礎(chǔ)，給出了一種確定機(jī)組制冰過程中最佳制冰時間的計算方法，理論上給出了不同制冰蒸發(fā)板制冰冷水進(jìn)水溫度下的最佳制冰時間。
[Abstract]:The rapid growth of the economy in China has caused a sharp increase in the demand for electricity every year. The situation of electricity supply and demand is still tense. The ice storage technology of demand side management can realize the peak filling and filling of power load. It is one of the important ways to alleviate the contradiction between electric power construction and new electricity use. The ice storage technology has been applied more and more in our country.
On the basis of the traditional single evaporator dynamic ice storage unit, this paper presents a dual evaporator dynamic ice storage unit system. The main characteristics of the system are the ice making and the cold water condition non common evaporator, the ice making condition adopts the honeycomb plate evaporator, the cold water condition adopts the falling film evaporator, and the refrigeration efficiency of the unit is improved. The group can make full use of night low valley electricity for ice storage and run efficient cold water mode when the ice storage capacity can not meet the demand of air conditioning load. It not only gives full play to the economic advantages of ice storage air conditioning, but also does not lead to the oversize of the system installed capacity. At the same time, it introduces the characteristics of the main components of the system and the process of selection and design.
Based on GB/T10870-2001, GB/T26194-2010 and other related standards, a multi-function test bench which can test the performance of dynamic ice storage unit and chiller is developed. The overall design scheme of the test bed is proposed. The test bed adopts the liquid refrigerant method and the heat balance method of the unit. The design and calculation of each system of the test rig are described in detail. The measurement and control system of the test bed is accurate and can meet the requirements of the related performance test standard. The test results of the dynamic ice cold storage unit with double evaporator show that the cold water condition and the ice production condition of the unit are good, and the design goal of the unit is achieved.
The heat transfer analysis and optimization of the double evaporator dynamic ice storage unit was carried out by using the theory of phase change heat transfer in heat transfer. The ice making process was analyzed by one dimensional phase change heat transfer model, and the ice making thickness, ice making rate and time were discussed. On the basis of the theoretical analysis of heat transfer, a method is given to calculate the optimum ice making time in the process of making ice in the process of making ice, and the optimal time for making ice under the water inlet temperature of different ice making evaporating plates is theoretically given.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB69

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