Inspection of HVAC systems through continuous monitoring and benchmarking (ISERV)
iSERV, an Intelligent Energy Europe (IEE) project, was designed to show the ability for automatic HVAC system monitoring to reduce energy use in practice. As an alternative and support to on-site inspections, iSERV used monitoring to identify inefficiencies in the operation of HVAC systems, report them and provide feedback to users. The project partners included main Building Services Professional Bodies in Europe, and the findings from the project will find their way into professional guidance for achieving energy efficiency in HVAC systems in Europe. Some of this guidance is in the form of ranges of benchmark energy consumption for various end-use activities.
The main target groups for this data are Building designers, system designers, manufacturers, Facilities Managers, HVAC Inspection bodies, and EU Member States legislators. The findings from iSERV will also help shape the implementation of the EPBD recast, allowing for automatic monitoring of Building Technical Systems as a complement to inspections.
- To monitor the energy use of 1600 HVAC systems drawn from 16 EU Member States. 288 HVAC systems are currently online, serving 225.000 m2.
- To evaluate the energy savings achieved in real systems once the energy consumption has been analyzed and the Energy Conservation Opportunities fed back to the system users, and to understand where these energy savings have been found and achieved.
- To produce HVAC system energy consumption benchmarks where appropriate, suitable for use in recast EPBD Inspection reports and suitable for assisting in investment decisions to improve energy use. These benchmarks will ideally be linked to the end-use activities served by the HVAC systems.
- To contribute to professional guidance publications in this area from CIBSE and REHVA
- To establish a new HVAC Inspection procedure that uses physical Inspection only where the HVAC system in question does not meet expected guidelines for energy efficiency, and to get this procedure accepted in new EU Member States legislation
- The first system on the database was MacKenzie House (Cardiff University). Through the use of iSERV, significant energy saving sin the operation of the HVAC system were detected. The energy consumption for the building went from 169 kWh/m2 down to 124 kWh/m2. In a 8.900 m2 building, this represented a saving of 89.000 EUR per year. More results will be available after April 2013.
- The UK government decided to include in their specification for school buildings, the requirement that all new and renovated buildings should be capable of working with iSERV or similar systems.
- The process of introducing systems in iSERV has been tested. The first step is the most complicated, as it requires the description of the building and the zones served by different systems. This is facilitated by a template in excel format, produced by iSERV. Facilities management departments welcomed the introduction of the template to record this information, which is very relevant for their work. Once the initial information is on the database, the process is automatic.
Project duration: May 2011 to May 2014.