Work-cold joint supplied cross still state straight and reverse coupling heating power circulation system and method

Abstract

The invention includes the following steps: heating the ammonia water working medium to a saturated liquid state and then being separated into strong ammonia steam and weak ammonia water; using the condensated strong ammonia steam as the refrigerating output and generate the strong ammonia wet steam; mixing the weak ammonia water after the power positive circulating work with the strong ammonia wet steam and then being condensated to be the fundamental concentration ammonia water working medium.

Description

technical field [0001] The invention relates to the field of energy technology, in particular to a power-cold combined supply cross-quiescent positive and negative coupling thermodynamic cycle system and method. Background technique [0002] Thermodynamic cycle is the theoretical basis of heat engine development and the core of energy power system, and it is also an important aspect and driving force for the development of thermodynamics. The introduction of the concept of total energy system in the 1970s and 1980s made the idea of ​​thermodynamic cycle research no longer limited to the advantages and disadvantages of a single cycle or process, but paid more attention to the exploration of various high-performance combined cycles that combine different cycles organically, so that the energy The transformation utilizes the process to improve to the system level to understand. The temperature ranges of the power positive cycle and the refrigeration reverse cycle are respectiv...

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Problems solved by technology

[0008] 1. Unreasonable utilization of heat source energy: In heat exchangers (such as waste heat boilers, reboilers, etc.) heated by external heat sources, the flow of heat sources cannot be adjusted according to the principle of energy cascade utilization according to the requirements of different temperature levels of working fluids. Reasonable configuration, but most of them use a single heat source to heat the working fluid in the waste heat boiler and reboiler and then discharge it directly into the environment.

[0009] 2. The adverse effect of the characteristics of the mixed working fluid on the condensation process of the power cycle: Compared with the single working fluid, the variable temperature condensation of the mixed working fluid increases the irreversible loss of the condensation process of the power cycle, and at the same time makes the turbine exhaust pressure increase relatively. high

Although the existing forward and reverse coupled cycles have adopted some measures to alleviate this problem to a certain extent, the condensation process is still one of the main sources of exergy loss in the entire cycle, and it is the main reason that restricts the performance of the mixed working fluid coupled cycle.

[0010] 3. Waste of pressure energy (exergy) in the system: In the conventional ammonia absorption refrigeration reverse cycle, throttling valves are used in many places to achieve the required pressure drop, making the corresponding pressure energy (exergy) lost in vain

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