- Location: Glasgow, Scotland
- Client: John Gilbert Architects
- Services: Energy Appraisal
Luths Services conducted an energy appraisal for Quaker House, a historic building constructed in the 1850s, located in Glasgow. The project, in collaboration with John Gilbert Architects, aimed to enhance the building’s energy efficiency while preserving its architectural heritage.
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Dynamic Thermal Analysis
Starting with a detailed dynamic energy model using IES-VE, we could run several simulations to show an accurate replication of the building performance down to a 10-minute resolution.
This kind of detailed resolution is particular important in buildings with a good deal of variation in occupancy levels.
It takes some time to get the quality and level of detail in the model correct, but it is fundamental to the value of the output for all the work that follows.
Heat Load Modelling
Traditional ‘steady state’ calculations for heat load tend to oversize the heating plant requirement as they are limited in their assumed internal and external parameters. These simple calculations also can not take account the previous operating periods.
Put simply, the building may already have some heat from the day before, rather than assuming you are heating it up from cold every day. Or it might take in heat from solar energy during the day and release this back into room spaces overnight.
Retrofit Assessment
Traditional ‘steady state’ calculations for heat load tend to oversize the heating plant requirement as they are limited in their assumed internal and external parameters. These simple calculations also can not take account the previous operating periods.
Put simply, the building may already have some heat from the day before, rather than assuming you are heating it up from cold every day. Or it might take in heat from solar energy during the day and release this back into room spaces overnight.
ASHP Sizing
We provided feasibility study for new Air Source Heat Pumps to provide space heating and hot water.
Key to this is the heat load sizing by a dynamic method. By doing an analysis across minutes not just one ‘design day’ it is easier to reduce plant size with thermal stores or other “load shifting” design techniques.
This showed plant size could be reduced by 33%- a saving of thousands of pounds when it comes to renewable heating plant like air source heat pumps.
Also importantly the heat pump plant could now be safely accommodated with the existing electrical load rating of the property without expensive upgrades.