CAJ | 학술논문

温包充注特性作为热力膨胀阀最重要的设计参数之一，对制冷系统稳定性有重要影响，然而当前这方面研究十分匮乏。本文对热力膨胀阀温包充注方式对蒸发器-热力膨胀阀回路的稳定性影响进行研究，建立了蒸发器-热力膨胀阀循环的热动力学模型，采用Nyquist稳定性判据研究系统的稳定性。结果表明：相对于温包平行充注，交叉充注有利于减小系统不稳定工作区域；对于交叉充注，提高交叉点压力值、降低压力-温度曲线斜率有利于减小系统不稳定工作区域。
온포충주특성작위열력팽창벌최중요적설계삼수지일，대제랭계통은정성유중요영향，연이당전저방면연구십분궤핍。본문대열력팽창벌온포충주방식대증발기-열력팽창벌회로적은정성영향진행연구，건립료증발기-열력팽창벌순배적열동역학모형，채용Nyquist은정성판거연구계통적은정성。결과표명：상대우온포평행충주，교차충주유리우감소계통불은정공작구역；대우교차충주，제고교차점압력치、강저압력-온도곡선사솔유리우감소계통불은정공작구역。
Charging characteristic of thermal expansion valve (TXV) bulb is one of the most important design parameters of TXV. Although the characteristics affect the stability of refrigeration system, the related studies are insufficient. The effect of charging characteristics on the stability of evaporator-TXV loop was studied in this paper. Thermal dynamic model of the loop was developed and Nyquist criterion was adopted to study the stability of the loop. The results indicate that:comparing with gas-charged bulb, cross-charged bulb would help to decrease the unstable region of the loop;higher cross-point pressure and lower slope of temperature-pressure curve would help to decrease the unstable region.