Криогенный охладитель на пульсационной трубе с термоакустическим приводом

Abstract

In this paper, a 77 Hz pulse tube cryocooler (PTC) driven by a thermoacoustic heat engine (THE) has been studied. A double-acting thermoacoustic heat engine incorporates a hot heat exchanger, a regenerator, a cold heat exchanger and an acoustic feedback. Compared with the conventional thermoacoustic heat engine which involves a travelling-wave loop and a resonator, it has advantages of compact size and potentially high thermal efficiency. In this paper, a THE-PTC system has been studied generally. Firstly,the numerical simulation has been conducted to design the system and so optimum structure parameters of the system were obtained. With the operating condition of 3.3 MPa for mean pressure and 50 Hz as a working frequency, a cooling power of 8 W at 77 K and a relative Carnot efficiency of 11.75% has been achieved.