The Design of an Energy Efficient Highly Glazed Office Building

Many modern office buildings have highly glazed facades. Their energy efficiency and indoor climateis, however, being questioned.

Enhancement of ventilation performance of a residential split-system airconditioning unit

The design of ventilation performance of air-conditioning systems in residential buildings is not quite established. In this paper findings from a recent study of the ventilation performance and IAQ in a master bedroom in Singapore are presented. The need to design for ventilation provision in split system air-conditioning units is suggested by the findings.

Pressure controlled variable air volume system

Designing an HVAC system has different aims, the first one is to satisfy the user with a long-term functioning system in the most energy efficient way and the second is to increase the supply air flow. So the main objective of this paper is to give the fundamentals for a system design that takes into account the 3 factors. The benefit of a pressure controlled variable air volume (VAV) system is presented .

Ventilation of isolation rooms in hospitals

Isolation rooms for airborne infectious agents requires special measures to prevent air from transporting agents from the patient to surrounding rooms. This paper presents measurements for two different solutions that demonstrate that good results could be obtained by selecting construction principles that prevents air leakages and by control of ventilation airflows interlocked to door positions. Further it is estimated how different parameters influences on the transfer of infectious agents from the patient room to the surroundings.

Displacement flow air supply through a raised floor covered by carpet - possible mistakes by wrong design and installation

Large spaces with high thermal loads and high air flow rates air conditioned by displacement flowsometimes require air supply through the raised floor. One favoured solution is to cover the perforated floor by an air permeable carpet. Successful solutions of this type of air outlets exist in many buildings in Germany since many years and work successfully. But design and installation require some knowledge which partly may have been lost in recent years. In newer buildings many difficulties appeared.

Design of Load in Thermal Network Models

The paper describes the use of a synthesis in thermal network models. Simulation methods areusually based on an analysis when the optimal solution is found by means of iteration process. Presented method is developed in a frequency domain for models that are built as electric circuits. General description of the method with used equations is given. The application is demonstrated in a case study when a cooling power for one room in light-weight building is found. Resultant values are time dependent internal cooling load that ensures desired inside air temperature during summer day.

Strategic Design Method for Natural Ventilation in Buildings

This paper introduces a simple method for a natural ventilation strategic design and the evaluation of ventilation effectiveness. A simplified integrated dynamic thermal and air flow model has been developed for natural ventilation building design at the early stage. This analytic method can perform parametric studies and an optimum opening design. The indices of overheating day and ventilation sufficiency have been proposed to evaluate the ventilation effectiveness. Computer program can perform dynamic simulation for the proposed design.

HVAC - The importance of clean intake section and dry air filter in cold climate

In this paper, practical recommendations for design and operation of HVAC systems are presented. The result of a proper maintenance will be less pollution and a better indoor environmental quality.

Design parameters for the performance assessment of hybrid residential ventilation systems

This paper summarizes the work within the EU RESHYVENT project in regard to design parameters for the performance assessment of hybrid ventilation systems. A framework for performance assessment based on simulation was developed. Performance criteria were defined for air flows, indoor air quality, thermal comfort, acoustics, energy, and emissions.

Potentiel de la ventilation naturelle en site urbain Potentiality of the natural ventilation in urban site

The aim of this paper is to give an overview of the work carried out during three years with URBVENT project and to present its main issues: - to provide methodologies and accompanying software tools to assess the potential and feasibility of natural ventilation - to design optimal openings for efficient naturally ventilated buildings.The different partners of this project are: five European University laboratories, two technical centers and one industrial company.