Simulation and analysis of humid air turbine cycle based on aeroderivative three-shaft gas turbine

Due to the fact that the turbine outlet temperature of aeroderivative three-shaft gas turbine is low,the conventional combined cycle is not suitable for three-shaft gas turbines.However,the humid air turbine(HAT)cycle provides a new choice for aeroderivative gas turbine because the humidification process does not require high temperature.Existing HAT cycle plants are all based on single-shaft gas turbines due to their simple structures,therefore converting aeroderivative three-shaft gas turbine into HAT cycle still lacks sufficient research.This paper proposes a HAT cycle model on a basis of an aeroderivative three-shaft gas turbine.Detailed HAT cycle modelling of saturator,gas turbine and heat exchanger are carried out based on the modular modeling method.The models are verified by simulations on the aeroderivative three-shaft gas turbine.Simulation results show that the studied gas turbine with original size and characteristics could not reach the original turbine inlet temperature because of the introduction of water.However,the efficiency still increases by 0.16%when the HAT cycle runs at the designed power of the simple cycle.Furthermore,simulations considering turbine modifications show that the efficiency could be significantly improved.The results obtained in the paper can provide reference for design and analysis of HAT cycle based on multi-shaft gas turbine especially the aeroderivative gas turbine.

Study on Calculations of Humidification Tower with Humid Air Turbine Cycle at High Temperature and Pressure

Humidification is an important step in humid air turbine system. The calculation on humidification is carried out at 423.15—573.15K, 5—15MPa. The results suggest that to produce high-enthalpy moist air, high water temperature and large water flow are needed. The water temperature is the most sensitive parameter to the humidification tower. And it is better for the humidification tower to work at temperature higher than 523 K when the system pressure is higher than 5 MPa. The comparison between the model used in this paper and ideal model shows that the ideal model can be used in simulation to simply the calculation when the temperature is lower than 473 K and pressure is lower than 5 MPa.

湿空气透平(HAT)循环的研究发展现状

文中介绍了新型高效热力循环——湿空气透平（ＨｕｍｉｄＡｉｒＴｕｒｂｉｎｅ——ＨＡＴ）循环及其相关循环的概念、特点和国内外研究发展状况。

HAT循环的系统优化

ＨＡＴ循环的系统优化肖云汉，林汝谋，蔡睿贤（中国科学院工程热物理所北京１０００８０）关键词：ＨＡＴ循环，系统优化一、前言ＨＡＴ循环采用两相、多组份的混合工质，利用现有成熟的部件技术，以低造价的简单系统实现高效率、高比功、低污染和良好的变工况性能，引起...

有无后冷器的微燃气轮机HAT循环性能比较

基于某80kW微燃气轮机回热循环改造工作,比较了有后冷器和无后冷器的HAT(Humid Air Turbine)循环性能和需要增加的换热器面积。研究结果表明,对于所研究的微燃气轮机,有、无后冷器的HAT循环系统折合效率和折合输出功相当,与有后冷器的HAT循环相比,无后冷器的HAT循环湿化器更高,体积更大,但是由于省掉了后冷器,其总换热面积(后冷器、湿化器、省煤器换热面积之和)更小,即意味着其投资更低,且无后冷器的HAT循环系统结构更简单,将使系统更加紧凑且控制更容易。

湿空气透平循环(HAT循环)中饱和器性能实验台的设计

本实验模拟了实际HAT循环中饱和器的热力过程。通过实验，研究分析，影响饱和器性能的主要因素，从而探讨HAT循环的商业化途径。本文介绍了实验装置流程、饱和器结构、喷雾嘴布置及水加热设备的设计。

HAT循环仿真模型研究综述与展望

文中介绍了新型高效热力循环———HAT循环的概念、优点,以及国内外对HAT循环仿真模型的研究现状,在此基础上提出了建立HAT循环动态仿真模型的必要性和可行性。

饱和器底部温差对HAT循环性能的影响

研究了饱和器底部温差ＳＴＤ对循环性能的影响．理论分析发现，随着饱和器底部温差的增加，循环效率随之降低，而饱和器出口处空气的含湿量、单位输出功的水消耗及比功都有所提高，通过中冷器、后冷器及热水器的水流量也随之增大；当饱和器出口空气的相对湿度增大时，循环电端效率、单位输出功的水消耗及比功都有一定幅度的提高，通过中冷器、后冷器及热水器的水流量却有所降低．就水流量而言，从饱和器底部放出的水量（ＭＷ４）较多，受饱和器底部温差的影响也较大，其余依次是热水器（ＭＷ３）、循环回水（ＭＷ５）、后冷器（ＭＷ２）和中冷器（ＭＷ１）．

湿空气透平(HAT)循环的系统优化和性能分析

通过对HAT循环超结构流程的优化 ,给出了循环的最佳系统构成 。

联合循环、STIG循环、HAT循环及其相关循环的热力性能比较

On the same basis of components, the thermodynamic performances of combined gassteam cycle(CC), steam-injected gas turbine (STIG) cycle, humid air turbine(HAT)cycle and the relevant intercooling or reheat cycles are analyzed and compared. The conclusions obtained here may provide some theoretical bases for energy saving.

HAT循环中饱和器的动态仿真

该文从热力学、传热传质学、流体力学的基本原理出发 ,对饱和器内水滴侧和湿空气侧分别建立沿流动方向的一维动态数学模型 ;该模型在仿真平台EASY5上调试通过 ,通过计算得到饱和器稳态运行时的数据 ,然后完成了一组动态响应下的仿真实验 ;结论认为饱和器在稳态运行时 ,沿气体流动方向 ,气体质量流量增加 ,密度减小 ,速度增加 ;沿水滴流动方向 ,水滴的温度和速度降低 ,水滴浓度增加 ,水滴直径变小 ,但是水滴侧与空气侧的接触总面积却依然增加 ;对饱和器的动态响应而言 ,如果进水量出现扰动 。

整体煤气化湿空气透平(IGHAT)循环的性能分析

IGHAT循环把新颖的HAT循环和先进的燃煤技术结合起来，是一种高效率、低污染和低比投资费用的燃煤发电技术，正待人们进一步去研究和开发，它也将为降低IGCC的比投资费用和发电成本提供一条新的途径[1，2]。本文主要分析了IGHAT循环的性能，研究了主要参数透平前温、压比和湿空气相对湿度对系统效率和比功的影响。

HAT循环饱和器传热传质过程及相似分析

以HAT循环中饱和器为研究对象 ,讨论了实验研究的相似条件。在简化条件下建立了饱和器内部多相流的控制方程 ,并给出了相应的边界条件 ;对这些方程进行了无量纲化处理 ,根据微分方程的不变性原理 ,得到了饱和器实验研究中应遵循的相似准则 ,并对这些准则在实验中作用进行说明 。

回热器对HAT循环影响的分析

目前对HAT循环中回热器的理论分析大多采用传热温差法和表征回热器特性的回热度分析的方法。针对这两种不同的分析方法分别进行了计算,比较分析了它们对HAT循环的影响,结果表明,传热温差法更加适合于对HAT循环进行理论分析,但应当注意传热温差的选取。而回热度法更多应用于回热器的设计。

一种新的热力循环性能的估算方法和 HAT 循环的性能估算公式

根据热力学基本原理，提出了一种新的估算复杂热力循环性能的方法——系数修正法，并据此推导了空气湿化燃气轮机（ＨＡＴ）循环的性能估算公式。

HAT循环构成热电冷三联产总能系统的可行性分析

对国内外在提高能源利用率方面的研究现状和发展趋势进行了综述 ,在前人研究的基础上提出以湿空气透平湿空气透平 (HAT)循环构成热、电、冷三联产总能系统的能量利用形式 ,详细分析了构成该系统的相关技术、可行性及需要加以解决的几个问题。

整体煤气化湿空气透平(IGHAT)循环的参数优化

本文采用非线性优化方法，分析了整体煤气化湿空气透平（ＩＧＨＡＴ）循环的热力性能，研究了温化器出口空气含 湿量、间冷压比及空分集成程度等主要参数对循环性能的影响。结果指出较之湿空气透平（ＨＡＴ）循环，ＩＧＨＡＴ循环的 空气含湿量有了大幅度的提高，从而使得循环比功大大增加。

Design Research of a Novel Aftercool-Humidifier Concept for Humid Air Turbine Cycle

Humid air turbine cycle(HAT)has potential of electrical efficiencies comparable to combined cycle,with lower investment cost and NO_(x) emission.The typical heat exchanger network of HAT consists of intercooler(if there is),aftercooler,recuperator,economizer and humidifier,which brings higher efficiency but makes the system more complex.To simplify HAT layout,a novel humidifier concept is proposed by integrating the aftercooler into traditional counter-current humidifier.Based on this concept,a one-dimensional model including pressure drop and exergy calculation is established to distinguish the thermodynamic and hydrodynamic characteristics,and then the structural parameters,such as the number of rows and columns,tube diameter,pitch and type for a micro HAT are identified.The results show that the aftercool-humidifier plays the same role as original aftercooler and humidifier,and can match the in-tube air,out-tube air and water stream well with lower volume.In the case of micro HAT cycle,the volume of heat and mass transfer area can be reduced by 47%compared with traditional design.The major thermal resistance occurred in the convection heat transfer process inside the tube;however,using enhanced tube cannot effectively improve the compactness of device.

10MW级HAT循环试验系统配置与热力性能研究

HAT循环作为一种新型燃气轮机循环,具有低NOx、高效率、灵活热电调节、启停快的特点。本文分析了以某10MW级回热循环燃气轮机为基础,构建HAT循环热电联供特性试验系统的配置,给出了燃气轮机通流匹配、热电联供以及大范围热电比调节对燃烧室等部件的技术要求。

基于某百千瓦级微型燃气轮机的HAT循环热力系统设计与分析

为了研究基于微型燃气轮机的湿空气透平(humid air turbine,HAT)循环用于热电联供的热力性能,建立了某百千瓦级回热循环微型燃气轮机及其HAT循环的热力性能模型,优化了循环参数,分析了压损与换热温差对循环效率的影响,并对HAT循环热电联供效率与回热循环进行了比较分析。研究表明基于回热循环微型燃气轮机构建的HAT循环折合发电效率可以达到29.66%,比回热循环提高4.28个百分点。HAT循环的热电比范围为0~2.8,回热循环的热电比范围为0~2.4。当热电比为0~1.6时,HAT循环热电联供效率高于回热循环;当热电比为1.6~2.4时,回热循环效率高于HAT循环。本研究为HAT循环热电联供系统的设计与应用提供参考。