本文選題：閃發(fā)器 + 進(jìn)口參數(shù)�。� 參考：《華中科技大學(xué)》2015年碩士論文

【摘要】：噴氣增焓技術(shù)能夠有效提高熱泵以及空調(diào)的性能,這種技術(shù)可以應(yīng)用于中高溫?zé)岜迷O(shè)計中。帶閃發(fā)器的循環(huán)和帶中間冷卻器的循環(huán)是噴氣增焓的兩種典型應(yīng)用。現(xiàn)有研究已經(jīng)證明閃發(fā)器循環(huán)相比于中間冷卻器循環(huán)能夠多提高10.5%和4.3%的制熱量和熱性能系數(shù),而閃發(fā)器則是閃發(fā)器循環(huán)的一個重要部件,也是系統(tǒng)穩(wěn)定的重要環(huán)節(jié)。本文借助軟件對閃發(fā)器的閃發(fā)過程進(jìn)行了模擬。在模擬研究中選用了進(jìn)口流速、進(jìn)口壓力、進(jìn)口液相體積分?jǐn)?shù)三個進(jìn)口初始參數(shù)和進(jìn)口角這一結(jié)構(gòu)參數(shù)作為研究參數(shù),同時選定進(jìn)出口有液相體積分?jǐn)?shù)的變化率作為衡量閃發(fā)器性能的參數(shù)。本文首先建立了閃發(fā)的熱力學(xué)模型,確定以R134a作為研究工質(zhì),并一一選取了一些重要參數(shù)。對0°入口角的閃發(fā)器的氣液相以及壓力分布做了詳細(xì)的研究,并總結(jié)出了其分布規(guī)律,發(fā)現(xiàn)閃發(fā)器的進(jìn)出口液相體積分?jǐn)?shù)變化率最多為4.825%。研究進(jìn)口流速、進(jìn)口壓力、進(jìn)口液相體積分?jǐn)?shù)的變化對于閃發(fā)器的氣液相及壓力分布的影響,并總結(jié)出了三個進(jìn)口參數(shù)的變化對于閃發(fā)性能的影響。研究發(fā)現(xiàn)進(jìn)出口液相體積分?jǐn)?shù)變化率會隨著進(jìn)口流速的減小、進(jìn)口壓力的增大而增大,而進(jìn)口液相體積分?jǐn)?shù)的變化對此的影響則可以忽略。本文重點研究了進(jìn)口角這一結(jié)構(gòu)因素對于閃發(fā)率的影響,并結(jié)合進(jìn)口流速和進(jìn)口壓力進(jìn)行了詳細(xì)的分析。研究表明閃發(fā)器的進(jìn)出口液相體積分?jǐn)?shù)變化率隨著進(jìn)口角的增大而增大,在本文研究的進(jìn)口角、進(jìn)口壓力和進(jìn)口流速的范圍內(nèi),這一變化率最多為4.825%。并進(jìn)一步探究出了進(jìn)口角對進(jìn)出口液相體積分?jǐn)?shù)變化率的影響會隨著流速的減小和壓力的增大而減弱。本文對中高溫?zé)岜瞄W發(fā)器的研究可以為閃發(fā)器的設(shè)計提供重要的參考意義。
[Abstract]:The enthalpy increasing technology can improve the performance of heat pump and air conditioning effectively, which can be used in the design of medium and high temperature heat pump. Cycle with flicker and cycle with intercooler are two typical applications of enthalpy of jet. It has been proved that flash cycle can increase heating capacity and thermal performance coefficient by 10.5% and 4.3% more than that of intercooler cycle. Flash is an important part of flash cycle and an important link of system stability. In this paper, the flicker process is simulated by software. In the simulation study, the structure parameters of inlet velocity, inlet pressure, inlet liquid volume fraction and inlet angle are selected as the study parameters. At the same time, the change rate of the volume fraction of liquid phase in the inlet and outlet was chosen as the parameter to measure the performance of the flicker. In this paper, the thermodynamic model of flash is established, and R134a is chosen as the working medium, and some important parameters are selected one by one. The gas-liquid phase and pressure distribution of the flicker with 0 擄inlet angle is studied in detail, and its distribution law is summarized. It is found that the maximum change rate of the volume fraction of the liquid phase in the inlet and outlet of the flicker is 4.825%. The effects of inlet flow rate, inlet pressure and inlet liquid volume fraction on the gas-liquid phase and pressure distribution of the flicker were studied, and the effects of the three inlet parameters on the flash performance were summarized. It is found that the change rate of the volume fraction of the inlet and outlet liquid phase will increase with the decrease of the inlet flow rate and the increase of the inlet pressure, but the effect of the change of the volume fraction of the inlet liquid phase on the change can be neglected. In this paper, the influence of inlet angle on flash rate is studied, and the inlet velocity and inlet pressure are analyzed in detail. The results show that the change rate of liquid phase volume fraction increases with the increase of inlet angle. In the range of inlet angle, inlet pressure and inlet velocity studied in this paper, the maximum change rate is 4.825%. It is found that the influence of inlet angle on the change rate of volume fraction of inlet and outlet liquid will be weakened with the decrease of flow rate and the increase of pressure. In this paper, the research of medium-high-temperature heat pump flicker can provide an important reference for the design of flicker.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU83

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