Optimization of an HVAC prefabricated component in modular construction
Abstract
Objective of the Study: This paper provides information on newly developed software routines to optimize the module size for mechanical systems in commercial building projects. The primary objective of optimization is to increase productivity and maximize size of module. Method: Prefabrication and modularization has been used in the construction industry for decades. It has recently made a resurgence worldwide providing increased productivity, safety and quality. Renovation of a large educational building was used to develop and validate the optimization software. The facility's entire HVAC system was completely replaced in the existing structure creating unique constraints for the prefabricated module size of the HVAC components. To construct the mechanical system, it is divided up into modules of optimum size that maximize the productivity. The optimization routine utilized Microsoft Excel based optimization tools. Generalized reduced gradient (GRG) nonlinear method as basis, with application of 'Pareto optimal' method is used to perform the relevant optimization. Equations for constraints and the objective were derived using the relationships established amongst the parameters length, width, height, and weight. In the optimization model, length, width and height of the module were determined as the variables while volume of the module was maximized and connection time was minimized as objectives. Results and Conclusion: The resulting optimization routines provided the optimized HVAC module size for the facility. The result of this research is an optimized module for the relevant project and an optimization tool to assist contractors in sizing mechanical system modules. Future research is underway to utilize the optimization tool in conjunction with three-dimensional BIM models to divide the facility into optimal sized modules based on specific project constraints.
Degree
M.S.
Advisors
Hubbard, Purdue University.
Subject Area
Civil engineering|Industrial engineering|Mechanical engineering
Off-Campus Purdue Users:
To access this dissertation, please log in to our
proxy server.