Smarter buildings project: Lower the service costs

Smarter buildings project: Lower the service costs

How can you determine your savings? The most important thing is to determine the starting point and get insight of the current situation.
Technically that means that it’s necessary to have a clear description of the building (buildings year, acreage etc.) and the building bound installations to establish the saving possibilities.
When additional sensors are added at a later stage, optimalisations can be realized based on the data and insight.
By properly documenting the starting points, it becomes clealry which actions have led to savings.
The pilot project Smart Buildings is currently monitoring the energy meters en sensoring data to determine potential savings.
We will share this information with you through this message: what strikes us?
 

EUR ex BTW
per 
year/ m2 
VGM Servicecosts
Benchmark 2017
 
Smarter buildings
pilot 
location 2017 

 
Per year  CBS-

reference 

Smart buildings
pilot location 2017 
Electricity  6,69  5,10  Elektra (kWh/m2)  55,05  31 
Gas   5,06  14,15  Gas (m3/m2)  12,95  21 

Benchmarking brings perspective to measured data
The measured data from the Smarter Buildings pilot location were compared to the CBS figures. The high gas consumption and the associated costs in the comparison is outstanding.
A second benchmark in which gas costs and HSE service costs have been examined has proven the same, namely 64% higher service costs! On the other hand, electricity consumption and costs are lower.

Electricity use
To get more insight on the use of energy, we use a heatmap. The heatmap is shown down below and gives insight in the use per hour of the electritymeter in periods per week. The Heatmap shows a nice electrity profile that meets the expectations: an office thats in use five days a week, from approximately 9 a.m. untill 7 p.m. The energy consumption of the building out of office hours is 25% compared to the peek hours, which also meets the expectations. Yet we do notice something remarkable: whats happens at night at 01.00 p.m. that makes the energy consumption twice the zero load?
Reason to understand where that comes from? Yes, because it can result in a small saving on the already ‘low’ energy use.


Table 1: Heatmap 

Gas usage
The use of gas is shown by using a Scatterplot. In this graph, the gas consumption is compared with the outside temperature and gives the following insights; you would expect that the colder it is outside, the harder the boiler burns and the more gas is burned. In the purple line in the Scatterplot, the spread of the gas consumption is large regardless of the outside temperature. In the red circle you can see that gas is also used for heating at higher outside temperatures. This is direct energy waste and a reduction in comfort. By optimizing the boiler (regulation), substantial savings are possible.


The numbers tell the truth
Establishing the starting points helps to show the savings but also to find the first quick wins in terms of savings. The so-called low-hanging fruit often results in a few simple adjustments which lead to savings in service costs and gas and electricity. For more information about this project, please contact Wilfred van der Plas from Simaxx or Jan Mink from VTEC L & S.

The Smarter Buildings project receives co-funding from the OP Zuid program (Development Program South Netherlands). OP Zuid is a European subsidy program for the Southern Netherlands and uses funds from the European Regional Development Fund (ERDF). The spearheads of this program are innovation promotion – by promoting cross-overs with and between top clusters – and the transition to a low-carbon economy.





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