FM Air handling units. Air flow rate from 1.000 to 100.000 mc/h. FE Air handling units with 25 mm thickness panels. Air flow rate from 1.000 to 45.000 mc/h Title: Slow thermally activated building system and fast air handling unit join forces through the use of model based predictive control Authors: Sourbron, MaartenHelsen, Lieve Publisher: Czech Society of Environmental Engineering (STP) Host Document: Proceedings of the CLIMA 2013 Congress pages:1-10 Conference: CLIMA2013 REHVA World Congress edition:11 location:Prague, Czech Republic date:16-19 June 2013 Abstract: Thermally Activated Building Systems (TABS) have a large potential for energy use reduction in office buildings, because they fit nicely with low-exergy heat and cold production such as geothermal heat pump systems. However, due to the large thermal capacities, control of TABS should be carefully designed in order to avoid low control efficiencies. Moreover, due to the limited thermal power and the low controllability, TABS cannot always react adequately to occurring peaks in office building heat gains.

On the contrary, the Air Handling Unit (AHU), which is installed anyway to guarantee indoor air quality, is a fast reacting system, but requires high-exergy heat and cold production and is thus less energy efficient. How should these two systems cooperate? This paper investigates a Model based Predictive Controller (MPC) which controls the TABS as well as the AHU to guarantee thermal comfort at the lowest possible energy cost. Coupled TRNSYS-MATLAB simulations are used to assess the MPC behaviour. This paper demonstrates that MPC is the required link to unite TABS and AHU into one low-energy office building comfort system. KU Leuven publication type: IC Appears in Collections:Applied Mechanics and Energy Conversion SectionMechanical Engineering Technology TC, Technology Campus De Nayer Sint-Katelijne-WaverTechnologiecluster Werktuigkundige Industriële Ingenieurstechnieken These files are only available to some KU Leuven Association staff members All items in Lirias are protected by copyright, with all rights reserved.

Press releaseFast selection now possible of energy-saving air-handling units GEA Air Treatment GmbH, of Herne, Germany, in its design software Lplus is now the very first company to assign air-handling units to the new Eurovent energy-efficiency classes A to F. With this program Lplus, customers can now not only individually configure the models in the GEA CAIRplus range, but can also check them for energy-efficiency according to the latest criteria. Life-cycle cost calculations complete the selection process. These calculations allow conclusions on the cost-effectiveness of the models under planned conditions of use. Before ordering of actual systems, Lplus provides planners and decision-makers with reliable data on how energy-efficient the configured model is. The program assigns a model being considered to the new Eurovent efficiency classes on the basis of 3 criteria: the air speed in the internal cross-section, the heat-recovery coefficient and pressure drop of the heat-recovery units, as well as the power consumed by the fan.

Eurovent classification takes place in accordance with the new procedure, the new features of which include significantly more precise gradation than earlier (see text in box below). If the configured model does not satisfy the requirement of the required efficiency class, the user enjoys various modification options: e.g., enlargement of the model cross-section, selection of a different energy-recuperation unit, or use of a more efficient fan. air conditioning unit saleThe current version of Lplus, 5.37, allows selection, for example, of EFF-1 motors that have efficiencies up to 10% greater than EFF2 drives. ac window unit on saleOne of the benefits of the ECOPLAT-TWIN double-plate heat exchanger is its high heat-recovery coefficient and, in turn, the good Eurovent classification that it enables. ac units for restaurants

Most recently, moreover, the plate spacing that can now be selected for ECOPLAT double-plate heat exchangers enables greater design leeway. Proper selection of plate spacing (“S”) allows good heat recovery – as well as greater pressure drops, which require the use of efficient fans. “M” stands for mean values, and “L” is the optimal solution when low pressure drops are more important than a high heat-recovery coefficient. New energy-efficient classes in accordance with Eurovent – these have now changedThe new Eurovent energy-efficiency classes A to F, presented this year at the specialist trade show ISH, replace the old scale of A to C. Calculation of the classes is now based on the revised version of DIN EN 13053 (not yet published). Also new are the compensation options between the criteria. Now, not all limit values of an efficiency class must be simultaneously fulfilled to achieve a certain class. For example, a more efficient fan or an enhanced heat recovery can compensate for increased air speed in the model.

An additional new requirement is that all models in classes A to E must be equipped with heat recovery. Class F places no requirements on the energy efficiency of the models, but verifies conformity with the other tests in the Eurovent program (e.g., model box test and output tests).back to overview Fresh Air Ventilation Units AirCraft Air Handling of Stafford Manufacture Fresh Air Ventilation Units that provide Fast Efficient and Affordable Air Circulation – ideal Air Handling Units for Fast Food Restaurants. Food Industry AHU Air Handler Manufacturers. As one of Britain’s leading manufacturers of air handling units and ventilation units, AirCraft Air Handling are able to provide a 3 day fast track despatch service – ready for installation on-site. Constructed from aluminium profile AirCrafts’ Fresh Air Ventilation Unit is ideal for indoor and outdoor installation providing installers and contractors with easy installation and simple commissioning process.