The Engelsons office-retail building with area of 2,203 m² built in 2009 in Falkenberg in Sweden could be considered as a multi-functional building with the indoor climate conditions controlled by a hybrid ventilation system of air and water. In this hybrid system there are two methods of ventilation and heating/cooling: first with air diffusers with constant air flow and second with climate beams with demand-controlled on water side and constant air flow on air side. The building is used as offices, a warehouse and a store with packing area. During the design process the choice was to use a solution which merges energy efficiency and high standard of indoor air quality (IAQ) with the constant monitoring of temperature, humidity and energy consumption.
A hybrid ventilation solution for a multi-functional building (link here). News by Francesco Errico. The building is made from steel and concrete structure with well-insulated building envelope in order to reduce to the thermal losses to a minimum. The windows are of good materials and there is solar shading system in offices. The building can be split in 3 zones where each zone is served by an air handling unit (AHU 1, 2, 3). Zone 1 is rented out as offices to a third party, zone 2 is a warehouse, and in zone 3 are offices and a store with packing area. Both office areas (zone 1 and 3) are heated and cooled by climate beams which are demand-controlled on water side and these two zones are served separately by two air handling units And in the common areas (corridors and such) in office zones are installed air diffusers with constant air flow. The store is heated by air diffusers with constant air flow and cooled by climate beams (demand-controlled on water side and constant air flow on air side). The packing room is air-heated via air diffusers and cooled with a climate beam (demand-controlled on water side and constant air flow on air side) above the work desk. Furthermore in this packing area, a split system is installed to compensate the heat peaks during summer. The warehouse is heated only by the air diffusers especially designed for large spaces.
Demand controlled ventilation – case study on comfort and energy (link here). Master thesis by Francesco Errico. November 2014. The objectives of this research were to verify the operation of an installed system and to show the importance of a continuous monitoring of a facility installed in the south of Sweden and to compare the energy saving achievable with different ventilation systems with focus on keeping or improving the indoor comfort condition. The systems taken into account were: a constant air volume, a variable air volume and a demand controlled ventilation system, or rather, the three main evolution of a heating, ventilation and air conditioning system. The energy saving was also analysed considering two different production scenario in order to make the evaluation in terms of purchased energy after that an economical assessment was evaluated. The findings show the importance of continuous monitoring, the advantages of the choice of an advanced ventilation system and the weight that the production system have in the energy and economical cost. The results also help to understand the importance of indoor comfort analysis and its effect on energy consumption and people.
Presentation on Demand controlled ventilation – case study on comfort and energy (link here). Presentation by Francesco Errico. November 2014. The presentation describes the Engelson building in Falkenberg including monitoring system, indoor environmental evaluation, power and energy calculation, IDA ICE modelling, energy and economic evaluation. In commercial buildings it is economically viable to choose a DCV system in order to increase the comfort and decrease the energy use by up 50%. A DCV system achieves the highest comfort with the lowest possible operating energy.
Swegon Air Academy research: “Demand controlled ventilation – case study on comfort and energy”. May 2015. Video recording of presentation by Francesco Errico about results from Engelson building.
Images by Francesco Errico and Engelsons