Central Air-conditioning Piping System Dynamics Analysis And Software Development

Piping system is one of the most important structures in the outdoor unit of centralair-conditioning, and its design is of high difficulty. In the traditional design of pipingsystem, engineers generally design the initial solution based on the experience, then testprototype, and modify the design. The method can achieve the desired effect after manytimes, it is of high cost, low efficiency. As a result, for the piping system design ofoutdoor unit of central air-conditioning, whether can develop the corresponding testplatform or not has a significant impact to reduce development cost and shorten thedevelopment cycle.This paper analyses the load characteristics of the rotor compressor, introduces amethod which can reverse seeking the load of the compressor depending on themonomer test data of compressor. Setting up the prototype model of centralair-conditioning compressor-piping system in ANSYS, because of the centralair-conditioning is composed of multiple compressor system, this paper mainly researchthe method to obtain the maximum stress of piping system, when Several simpleharmonic excitation considering the presence of phase Angle difference, then obtainedthe dynamic characteristics of piping system by its dynamic analysis. Test data was gotfrom the prototype by vibration testing experiment, which were compared with thesimulation results. In terms of piping optimization, the paper write the codes of the linesegment of U-shape bending of piping scheme design optimization, optimal designoptimization and counterweight type selection optimization by APDL language, whichmay be called directly for ANSYS. The engineers can optimize the piping structure byusing alone or these three methods in combination, which can improve the workefficiency.The last, based on VC++, develop a piping dynamic analysis and optimizationplatform of central air-conditioning, which encapsulate the parameterized template ofAPDL for modeling, analysis and optimization of piping system. Its applications of theplatform removing the tedious operation steps of ANSYS, that can increase the R&Defficiency of new products obviously, shorten the development period and the cost.