Olivia Guerra-Santin

Development of Dutch occupancy and heating profiles for building simulation

ABSTRACT Building simulations are often used to predict energy demand and to determine the financial feasibility of the low-carbon projects. However, recent research has documented large differences between actual and predicted energy consumption. In retrofit projects, this difference creates uncertainty about the payback periods and, as a consequence, owners are reluctant to invest in energy-efficient technologies. The differences between the actual and the expected energy consumption are caused by inexact input data on the thermal properties of the building envelope and by the use of standard occupancy data. Integrating occupancy patterns of diversity and variability in behaviour into building simulation can potentially foresee and account for the impact of behaviour in building performance. The presented research develops and applies occupancy heating profiles for building simulation tools in order create more accurate predictions of energy demand and energy performance. Statistical analyses were used to define the relationship between seven most common household types and occupancy patterns in the Netherlands. The developed household profiles aim at providing energy modellers with reliable, detailed and ready-to-use occupancy data for building simulation. This household-specific occupancy information can be used in projects that are highly sensitive to the uncertainty related to return of investments.

Relationship Between Building Technologies, Energy Performance and Occupancy in Domestic Buildings

Building regulations have been updated to improve the energy performance of buildings. However, research has shown large differences between expected and actual energy performance of buildings. The differences have been attributed partially to occupant behaviour. Occupants have a large influence on the actual performance of buildings, creating uncertainties related to the actual energy savings, payback periods for low carbon technologies, and actual comfort in the buildings. This section explores the influence that building occupants have on the actual performance of domestic buildings and the consequences in the development of new and renovated low and zero energy housing. Monitoring building performance before and after renovation for retrofit projects, and monitoring building performance in experimental Living Labs and after the occupancy of buildings are discussed as potential solutions for occupancy uncertainties.