1 results about "Parallel compression" patented technology

The invention discloses a cross-critical CO2 parallel compression system and a capacity ratio method thereof. The system comprises a main loop and an auxiliary loop, and the temperature of the outletof a main loop of a gas cooler is reduced to the temperature of the outlet of a main loop of a supercooling-evaporator through the evaporation effect of the auxiliary loop in the supercooling-evaporator. The system comprises three working modes, the environment temperature is minus 20 DEG C to zero DEG C in a normal operation mode, and the frequency of the auxiliary loop compressor is adjusted toensure the efficient operation of the system; the environment temperature is 0-15 DEG C in a low-frequency operation mode, when the environment temperature is high and the heating amount is large, theenergy is saved by reducing the frequency; the environment temperature is lower than minus 20 DEG C in an ultra-frequency operation mode, so that the heating amount and the running stability of the system under an extremely low environment temperature are guaranteed; and the water return temperature in the three modes ranges from 35 DEG C to 50 DEG C, and the water outlet temperature ranges from50 DEG C to 70 DEG C. In the starting process, a low-frequency starting mode of the auxiliary loop compressor is carried out when the pressure of the auxiliary loop is less than 5 MPa, and the stability of the starting operation process of the auxiliary loop is ensured.