Application of Value Engineering Methods in Cost Optimization
The core formula of Value Engineering (VE) is Value V = Function F / Cost C, and the optimization objective is to achieve necessary functions at the lowest whole-life-cycle cost. The VE method is executed in mechanical and electrical cost optimization through five steps: function definition, function evaluation, solution creation, solution evaluation, and solution implementation. Function definition clarifies the core functions and auxiliary functions of each system; function evaluation identifies areas of excess function; solution creation proposes alternatives for high-cost, low-value areas; solution evaluation comprehensively assesses from four dimensions: technical feasibility, economic efficiency, reliability, and maintenance convenience.
Technical Paths for Optimized Integration of Mechanical and Electrical Systems
Optimized integration of mechanical and electrical systems reduces total cost by breaking down professional barriers to achieve functional integration of systems and equipment. In the integration of cooling and heating source systems, the air-conditioning cooling source, domestic hot water heating source, and swimming pool heating source are designed in an integrated manner, and heat recovery chillers are used to achieve combined cooling and heating supply. Heat recovery units can recover condensation heat during cooling for domestic hot water preheating, obtaining free heat of approximately 1.2 times the cooling capacity. System integration reduces the total investment in cooling and heating sources by approximately 15%-20% and annual operating costs by approximately 20%-30%. The integration of air-conditioning and fresh air systems adopts dedicated outdoor air systems to handle the entire fresh air load.
Cost Optimization Driven by Quota Design
Quota design is an effective method for design optimization with investment amount as a constraint while meeting functional and quality requirements. The mechanical and electrical quota indicator for five-star hotels is 150,000-200,000 yuan per guest room or 3,500-4,500 yuan per square meter. The quota is allocated to each discipline: HVAC 35%-40%, electrical 25%-30%, plumbing and drainage 15%-18%, fire protection 8%-10%, and intelligent systems 7%-10%. Phased quota control is implemented during the design stage: schematic design controls the overall quota (10%), preliminary design controls the discipline quota (5%), and construction drawing design controls the sub-item quota (3%).
Application of BIM Technology in Refined Cost Management
BIM technology provides strong technical support for the refined management of mechanical and electrical engineering costs. The accuracy of automatic quantity extraction can reach over 95%, saving 80% of the time compared with traditional quantity takeoff. 5D cost simulation adds time and cost dimensions to the 3D model to achieve dynamic simulation. Design change impact assessment automatically updates quantities and recalculates costs when changes occur. Pipeline coordination optimization can identify clash issues in advance and reduce costs by approximately 3%-5%. BIM cost management should achieve the LOD400 level of precision.