Study On CCHP System Based On Organic Rankine Cycle And Kalina Cycle

There are heat losses to the environment at each stage of industrial processes. The main reason is the irrationality of manufacture, transmission and utilization. The goal of waste heat recovery is to reduce these wasted heats. However, for many low-grade heat sources, if only by a simple heat exchanger device, these low-temperature waste heat can not be efficiently utilized. Organic Rankine cycle (ORC) and Kalina cycle thermal power generation systems in the current appears to have great potential to solve this problem.This paper describes the basic organic Rankine cycle system, as well as the properties and classification of organic working fluids. It also put forwards the thermodynamic analysis of basic Rankine cycle and regenerative Rankine cycle. This article introduces ammonia Kalina cycle, and the computational methods of ammonia refrigerant’s nature. It also analyzes the thermodynamic properties of ammonia Kalina cycle to further improve the low-temperature waste heat utilization system. For the more efficient use of low-grade waste heat, the paper analyzes the Combined Heating and Power (CHP) system model and Combined Cooling Heating and Power (CCHP) system model and the operating strategy.This article introduces of CHP-ORC system and CCHP-ORC system, and analyzes their operating characteristics.This paper presents a novel solar Kalina CCHP system, using EES for its mathematical modeling and thermodynamic analysis. With the increase of the turbine inlet temperature, the thermal efficiency first decreases and then increases, because the increase in turbine inlet temperature leads to the enthalpy drop of the turbine power out. However, the increase of turbine inlet temperature will increase heat absorption of solar collectors. Two factors work together to make a "worst" turbine inlet temperature which corresponds to the lowest thermal efficiency.This paper presents a R245fa combined with ammonia steam power cycle system, using software Engineering Equation Solver (EES) for its mathematical modeling and thermodynamic analysis. For the same group of ammonia concentration x, as the main cycle evaporation temperature goes up, the changing range of the output power is not large; the system sensitivity performance of the bottoming cycle evaporation pressure is much higher than that of the primary cycle evaporation temperature, therefore, this property provides the basis for optimizing the system; this article proposes a "radar map" to achieve a two-dimensional analysis of the system performance.