Abstract
Based on the oil quality of diesel oil, the thermal efficiency and fuel consumption of the fuel‐burning submersible hot water machine were calculated. The structure of the fuel‐burning submersible hot water machine was designed. The heat transfer calculation of the flame tube and convection surface of the high‐efficiency fuel submersible hot water machine was carried out, and the overall heat balance of the system was checked. ANSYS was used to analyze and study the mechanical and thermodynamic properties of the fuel‐based submersible hot water machine, and the simulation results were compared with the theoretical calculation results. The thermal field of the flame tube and the threaded tube was simulated, and the influence of the temperature field on the flame tube was analyzed. The changes in the total deformation and strength of the flame tube under the thermal structure coupling were studied. The thermal efficiency of oil‐fired submersible hot water machine was studied, and the relevant factors affecting the thermal efficiency of oil‐fired submersible hot water machine were put forward. The main factors affecting thermal efficiency were analyzed and mathematically modeled. The air supply model and the convective heat transfer model of the threaded tube were established. The main parameters that affected the thermal efficiency of the threaded tube were optimized. In the end, the design scheme of a high‐efficiency fuel‐type submersible hot water machine was obtained.
Highlights
Hot water machines have been widely used in various fields, especially in areas where the demand for hot water is relatively large. ere are many types of hot water machines, and the application types of hot water machines are different in different working locations and environments
There has been a lot of research on related water boiler [3,4,5]
Liu et al [8] proposed a high-throughput screening method (HTS) based on machine learning to design and screen the best combination of external characteristics of water-in-glass evacuated tube solar water heaters (WGET-SWHs) with high heat collection rate, but there is no research on the relationship between the structure and heat of the hot water machines. is paper researches and optimizes the structure and mechanical
Summary
Hot water machines have been widely used in various fields, especially in areas where the demand for hot water is relatively large. ere are many types of hot water machines, and the application types of hot water machines are different in different working locations and environments. There are very few research studies on oil-fired submersible hot water machines at home and abroad. Based on the simulation results, the parameters of the indirect heating hot water machine were optimized They did not research and optimize the structure and mechanical properties of indirect heating hot water machines. 2. Analysis and Calculation of Original Data and Fuel Characteristics of Oil-Fired Submersible Hot Water Machine. After completing the heat balance calculation, the thermal efficiency of the hot water machine system and the consumption of the hot water machine per hour should be obtained initially, so that the subsequent structural design of the fuel-based submersible hot water machine can be carried out. E heat balance calculation of the oil-fired submersible hot water machine is based on the operation of the hot water machine system under stable thermal conditions. Where Qr is 1 kg of 0# diesel fuel sent to the heat of the submersible hot water machine system, Qr 42900 kJ/kg; Q1 is the efficient use of heat in the hot water machine system, kJ/kg; Q2 is the heat loss during exhaust of the hot water machine, kJ/kg; Q3 is the heat lost when the oil mist of the hot water machine is incompletely burned, kJ/kg; and Q5 is the heat transferred from the hot water machine system to the surrounding environment, kJ/kg
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