建筑环境与能源应用工程专业英语15.pptx

What missioning (Cx) ?
Definition:
“A quality-focused process for enhancing the delivery of a project. The process focuses on verifying and documenting that the facility and all of its systems and assemblies are planned, designed, installed, tested, operated, and maintained to meet the Owner’s Project Requirements.”
ASHRAE Guideline 0-2005, missioning Process
Commissioning is often performed by an independent third-party pany.
Operates as an owner’s representative to insure the installed systems meet the owners requirements and the plans and specifications
Usually hired by the owner, sometimes by the architect, or general contractor.
Commissioning Person
All participants in the construction project have missioning responsibility. Participants include missioning authority, owner, design professionals, construction manager, general contractor, subcontractors, operation and maintenance manager, suppliers, and equipment manufacturers.
Benefits missioning
Reduced change orders
Less warranty and callbacks for contractor
Smoother turnover to maintenance
Improved equipment reliability
Reduced IEQ problems
Reduced plaints
Improved productivity
Correct system operation and installation
Facility meets Owner’s expectation and operational needs
Reduced utility consumption and operational costs
Commissioning Objectives
Ensure the facility meets the owner’s performance requirements
Provide a safe and healthy environment
Provide optimum energy performance
Provide a facility that can be efficiently operated and maintained
plete orientation and training to facility staff and occupants
Provide improved documentation of system characteristics
Commissioning - What did we use to do and why do we need it?
CX of mechanical and electrical systems was done by the installing contractors
No standardization, or clear approach
Most of the real CX occurred during the warranty period as warranty calls
Buildings operated less efficiently
First year of occupancy was frustratin