The Dynamic Modeling And Simulation Of Packed Humidifier In HAT Circle

In nowadays, energy crisis and environmental pollution are the main problems for the mankind. The developing country such as China suffers more than other countries in these problems. So, not only should we tap new resources of energy, new technology of pollution treatment, but also improve our technical processes which are now widely used in daily life to use the energy in higher efficiency and lower pollution.The gas turbine technology is always considered to be the most efficient and clean way of energy conversion in the power engineering field. After a long development period, normal gas turbine circle is optimized and upgraded by the new technology which is developed on the basis of matching different thermodynamic processes and circle to be a combined thermodynamic circle. As one of them the Humid Air Turbine Circle (HAT circle) is a hotspot for its high efficiency, low pollution exhaust and low manufacturing costs.As the key part of HAT circle, humidifier can increase the temperature and humidity of the air using the low temperature hot water, so that the exhaust energy is fully used. In addition, while the air is humid, the mass flow rate is raised so the discharge of CO and CO2 goes down and the vapor in the combustion chamber makes the form of NOx more difficult. The high temperature, pressure and humidity working condition, the two phase flow and complex heat and mass transport process in humidifier makes the research more difficult but more important.A dynamic simulation model of humidifier is erected on the platform of MSC.EASY5. Based on this model, an experiment on steady operation state and dynamic operation state is studied. In the steady operation state part, main parameters exchange in the body and the influence of the exchange of inlet parameters to the outlet parameters is studied. In the dynamic operation state part, the response of the humidifier and the outlet parameters exchange according to the perturbation of water inlet perturbation parameter is studied.Experiment of the humidifier is done on a packed humidifier experimental platform of Turbo-machinery Institute of Shanghai Jiaotong University. The date of the experiment under different inlet water temperature conditions is manipulated to verify the results of the model.The conclusions are: The mass flow ratio of water and air at inlet is very important to the HAT circle so we should chose it appropriately according to different working conditions. High temperature contrast of the air and water at inlet helps to raise the efficiency of humidifier.