Water is very important as an extinguishing material. However, it is difficult to put out the fire for the long-range or complex environment because of vulnerable, dosage and low efficiency. In this paper, a kind of high-efficiency water-soluble fire extinguishing agent was developed. The results show that the effective firefighting distance was increased by more than 40% and firefighting time was reduced by more than 1/3 when the fire extinguishing agent was used.

Power plant courses in colleges and universities are core courses for majors such as Flight Technology, Civil Aviation Maintenance Engineering, Marine Engineering, and Naval Architecture and Ocean Engineering. Their teaching quality directly affects the cultivation of high-quality technical talents in the industry. Aiming at the common problems existing in the traditional teaching of these two types of courses, such as abstract and incomprehensive theories, limited practical resources, lack of ideological and political elements, and single assessment methods, this paper puts forward reform strategies from five dimensions: teaching methods, content reconstruction, practical system, integration of ideological and political education, and assessment mechanism. It is combined with the developmental need of the industry and the innovation trend of educational technology. Specifically, it solves the teaching problems of complex equipment through virtual-real integration technology, reconstructs the course content guided by industry needs, strengthens practical capabilities relying on the “integration of theory and practice” and “integration of competition and teaching”, explores ideological and political elements to realize value guidance, and establishes a process-oriented and competence-based assessment system. Teaching practice shows that after the reform, students’ understanding of the structure and principle of power plants has been significantly improved, their practical operation skills and professional literacy have been remarkably enhanced, which provides a reference model for the teaching of similar engineering and technical courses.

In order to calculate the existence time of bubbles in the wave, differential equations of heat and mass transfer, velocity and radius of bubbles are established respectively, and a coupled model of bubbles floating in high temperature in wave is constructed by combining two-dimensional deep-water wave model. The Runge-Kutta method with variable step size is used to solve the numerical problem. Three laws of the bubble existence time in different initial states are obtained by simulation. First, the bubble is pulled by waves and its upward trajectory is spiral. The smaller the bubble radius has the longer of bubble existence time. Second, the higher of the initial temperature, the longer of bubble existence time is affected by the radius change. Thirdly, in still water and wave, the difference of bubble radius and average velocity is small, so that the existence time is basically the same. The model and conclusion take into account the influence of wave on the existence time of different bubbles in real sea conditions, and can be used as a theoretical basis for the research on the bubbles floating existence phenomenon.

The law of smoke spread in ship fires has a significant impact on the safe evacuation of personnel. This article takes a certain type of passenger ship as a modeling prototype and uses the fire simulation software Pyrosim to analyze the smoke spread law after a fire in the restaurant and engine room. Using the personnel safety evacuation simulation software Pathfinder, the evacuation situation of personnel located on the second and third floors was evaluated for safety. The results indicated that the height of fire smoke was a key factor affecting personnel evacuation, and the research conclusions could provide important references for optimizing personnel evacuation routes.