Airflow Numerical Simulation And Design Method Study Of Hotel Air Conditioning

Air conditioning design of hotel is important to hotel building. Using computational fluid dynamics technology, this thesis studies indoor airflow of hotel air conditioning and discusses the optimizing method for hotel air conditioning design.In this article, CFD software FIDAP is used in simulating the velocity field and temperature field of hotel guest rooms. Under the two-existing air conditioning methods, the post-processing module of FIDAP draws the velocity field plots and isotherm line plots under the two air conditioning methods of guest rooms. Based on the analyses of velocity field and temperature field, with using valid-temperature-difference as evaluation target, the author calculates and analyzes the thermal comfort character of guest rooms. The results showing that the guest room can be compartmentalized comfortable part, a little comfortable part and inadequate comfortable part according with the distance to the component. Therefore, the thesis putts forward a preliminary modifying air conditioning design option, which can improve the whole comfort character of guest rooms, by selecting fan-coils units rationally, adjusting air-supply angle and decrease air-supply velocity.Then the air distribution system of the above-mentioned hotel's multi-function-hall was simulated with FIDAP, and the indoor temperature and velocity under the preliminary option was calculated. Under the half-load condition of small air-supply quantity and slow velocity, finds that the problem has arisen, which the cold jets fall too fast in summer and the air distributes layer upon layer in winter. The improved option is put forward with adjusting air-supply velocity and change its angle. The new option's simulating results leads to that the option achieves the desired results, which proves to be reasonable and practicable.Based on summarizing the above-mentioned work, CFD design method of hotel air conditioning is put forward, which is better than the traditional air distribution system design method. The move can be generalized: First, develops preliminary option by determining design data with jet computation. Secondly, develops improved option in connection with the finding problem by simulating and verifying the preliminary option. At last, determine the final option by simulating, verifying and accomplish the improved option.