AIVC - Air Infiltration and Ventilation Centre

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energy consumption

Analysis of the impact of CO2-Based demand-controlled ventilation strategies on energy consumption

This paper presents an integrated IAQ/HVAC simulation environment that can model the impact of contaminant-based demand-controlled ventilation (DCV) strategies on both indoor air quality and HVAC system energy use for multizone buildings. The predictions of the integrated IAQ/HVAC simulation environment are first validated against experimental data obtained from laboratory testing. Then the simulation environment is used to investigate the performance of three ventilation control strategies, namely: one conventional control using fixed-position for outside air damper and two

A Study of a Mixed Mode Environment in 25 Cellular Offices at the University of Sydney

Twenty five cellular offices in the Wilkinson Building at the University of Sydney, Australia are ventilated through operable windows and doors and have been retrofitted with a supplementary reverse cycle cooling/heating system with an occupant controlled fancoil unit in each room. Energy consumption and occupancy and temperature status of rooms have been monitored since the system was commissioned at the end of 1997.

Humidity sensitive systems is 20 years old

During the last 20 years, the humidity sensitive ventilation system evolved to products increasingly simplified thus standardised. At Aereco, there were 5 generations of extract units, each modification of product was due to a change in the acceptation criteria. In many countries, systems with variable airflows are accepted and recognised ; regulations moved. In other countries, the orthodoxy of the constant airflow of an air change per hour remains in force for simplifying reasons or by ignorance of the real interest.

Fuzzy neural networks model for building energy diagnosis

A comfortable indoor climate environment is necessary for modern buildings and therefore the Heating, Ventilation and Air-Conditioning (HVAC) systems are widely used. Faults or disturbances are normally unavoidable in the systems and they will lead to more energy consumption or degradation of comfort level of indoor climate. Energy consumption is useful to detect the

Energy conservation benefits of a dedicated outdoor air system with parallell sensible cooling by ceiling radiant panels

Dedicated outdoor air systems (DOAS) integrated with ceiling radiant cooling panels as a parallel sensible cooling system are being considered as an alternative to conventional variable air volume (VAV) systems for commercial buildings because of their energy conservation, first and operating costs, and indoor air quality advantages. A pilot DOAS/radiant panel cooling system is being constructed on a university campus to investigate its advantages over alternative cooling systems in

Results of the Berlin-Riga pilot project on the increasing of energy consumption efficiency in multi apartment houses

This article provides information on the characteristic heat-related data of the enclosing constructions of the existing multi-apartment houses in Latvia as well as those of the sanitation systems in these houses.Monitoring of the heat energy consumption has been conducted in order to determine energy consumption over one-year period in a renovated nine-storey multi-apartment house of the 602 series design. The results obtained through monitoring have been compared with those of the heat energy consumption in an analogous reference house.

State of the art low energy office building in Norway

This paper shows that well proved state-of-the-art technology can be utilized to keep annual average energy consumption in office buildings below 130 kWh/m2, which is well below today's average, without compromising any major functional or architectural concepts of modern design. The Norwegian building regulations, which were revised in 1997, demand calculation of energy consumption for new buildings. However, the minimum requirements to energy consumption can even be satisfied with a modest degree of insulation or high internal loads.

Optimizing energy consumption and indoor environment in cold climate buildings through use of simulation codes and optimizing procedures

Even though simulation is being increasingly used in design of modern buildings, the full potential of simulation is usually not achieved. To improve building and HVAC system performance, designers usually guess different values of design parameters and then redo the simulation without actual knowing if the guessed value will lead to improvement. This is inefficient and labor intensive. In addition, if the number of design parameters being varied exceeds two or three, the designer can be overwhelmed in trying to understand the nonlinear interactions of the parameters.

Energy consumption in occupational buildings

The aim of this project has been to provide information on energy consumption in different building categories. Previous studies have focused on total energy use and not on how the consumption of energy is divided in various categories. On a national level, statistical data are generally available in terms like energy consumption per square meter.

Houses withous heating systems. Evaluation of the first winter

Twenty terrace houses without heating system has been built in Sweden. The houses are extremely well insulated and very airtight. They are also quipped with a high efficiency ventilation heat recovery system. The total electricity consumption and the air temperature in two positions has been monitored for each of the houses on an hourly bases. Further has the environmental conditions, i.e. outdoor temperature, wind, sun etc been monitored. In six of the houses separate measurements of electricity consumption for ventilation and hot water has also been performed.