4results about How to "Improve thermodynamic performance" patented technology

This invention discloses a combined cooling, heating, and power (CCHP) system, relating to the field of solar energy utilization technology. It includes an energy storage medium, a heat collection subsystem, a supercritical organic Rankine cycle (SOCCR) subsystem, and a refrigeration subsystem. The SOCCR subsystem can output electricity and heat load; the refrigeration subsystem can output cooling load. The energy storage medium can be heated in the heat collection subsystem. Energy storage medium leaving the heat collection subsystem can enter the SOCCR subsystem, providing a first driving heat energy for the SOCCR subsystem's output of electricity and heat load. Energy storage medium leaving the SOCCR subsystem can enter the refrigeration subsystem, providing a second driving heat energy for the refrigeration subsystem's output of cooling load. This invention can improve energy conversion efficiency.

A self-cascade refrigeration system and control method based on vortex tube regulation of working fluid composition and flow rate are disclosed. The self-cascade refrigeration system includes a compressor, condenser, vortex tube, electronic expansion valve, solenoid valve, cascade heat exchanger, evaporator, control device, and temperature and pressure sensors. The control device collects signals from the compressor outlet pressure and temperature sensors, condenser outlet temperature sensor, vortex tube liquid phase outlet pressure sensor, vortex tube hot end outlet temperature sensor, and condenser outlet temperature sensor. It regulates the vortex tube hot end outlet regulating valve, electronic expansion valve, and control solenoid valve. During operation of the self-cascade refrigeration system, the regulating valve of the vortex tube adjusts the refrigerant flow rate in the evaporator, and the vortex tube outlet pressure changes the concentration of mixed working fluid components in the evaporator. By changing the refrigerant flow rate and mixed working fluid component concentration during operation, the safe and efficient operation of the refrigeration system is ensured, and the system's thermodynamic performance is significantly improved.

This invention discloses a carbon dioxide sequestration method and sequestration system. The sequestration method includes the following steps: (1) injecting an aqueous solution of 1,3-dioxolane into a target geological area; (2) injecting the gas to be sequestrated into the target geological area, generating carbon dioxide hydrate through a reaction. The sequestration system includes a monitoring unit, a delivery unit, and a hydration reaction unit; the delivery unit and the hydration reaction unit are connected; the delivery unit includes a horizontal injection well and a horizontal gas injection well; the monitoring unit includes a horizontal monitoring well. The carbon dioxide sequestration method and sequestration system provided by this invention utilize the thermodynamic and kinetic dual promoter 1,3-dioxolane to achieve carbon dioxide sequestration in large-scale scenarios, realizing efficient, rapid, and environmentally friendly CO2 geological sequestration.

The application discloses a hydrogen injection strategy optimization method for a dual-fuel X-type rotor engine, obtains geometric parameters of the X-type rotor engine, establishes a CDF fluid simulation model of a dual-fuel X-type rotor engine with gasoline intake port premixing and hydrogen in-cylinder direct injection, determines engine ignition parameters and operating conditions of a single hydrogen injection strategy, and obtains, through simulation calculation, a hydrogen injection time point at which a hydrogen distribution area is maximum and a hydrogen injection time point at which a flame front area is maximum. Under the condition that the hydrogen injection total amount at the two hydrogen injection time points is the same as that of the single hydrogen injection strategy and the hydrogen injection mass fraction at the two hydrogen injection time points is taken as a variable, the hydrogen injection mass fraction corresponding to the hydrogen injection time point at which the hydrogen distribution area is maximum and the hydrogen injection mass fraction corresponding to the hydrogen injection time point at which the flame front area is maximum are obtained through simulation calculation, an optimal two-stage hydrogen direct injection strategy of the dual-fuel X-type rotor engine is obtained, and the thermal efficiency and emission performance of the rotor engine are improved.