Weather data around the world for design of field hospital HVAC

Field hospital (FH) is a military mobile complex to be deployed in almost any climate around the world. Heating, ventilation and air-conditioning (HVAC) system for the Czech Republic FH units is being redesigned. Computer simulation software will be used for the design of HVAC under variety of specific outdoor conditions. Simulation software requires weather data to calculate energy balance of buildings and HVAC systems. Currently there are several weather data sets available for this purpose. All contain weather data but they may differ significantly. Therefore they should be carefully selected prior to their use. Even though a lot of databases are available, there is poor access to proper data outside of U.S., Western Europe and Japan, and in non-typical regions in terms of simulation exercises (i.e. developing countries). This paper reviews accessible weather data files and suggests which weather data should be used for design and long-term performance analysis of FH HVAC system in various non-typical geographical locations around the world

Computer simulation and measurements of a building with top-cooling

This paper deals with the use of computer simulations both for design support of a new building including its heating, ventilation and air-conditioning (HVAC) systems and for optimization of the HVAC control strategy during operation of the completed building. In the early design phases for a new commercial building in Prague computer simulations were carried out in view of possible effects of night cooling ventilation. Predictions of the indoor environment and energy consumption for various options regarding cooling capacity and different outdoor ventilation rates supported the HVAC system design which included daytime top-cooling and night ventilation with outdoor air combined with accumulation of cold in building constructions. After completion of the building, occupants' complaints and a set of measurements indicated some problems with the HVAC, which were subsequently solved. Long-term monitoring and further computer simulations were performed in order to optimize the control strategy of the top-cooling system

Computer simulation for better air-conditioning and ventilation design of industrial halls

The paper deals with the use of computer simulations both for the design support of HVAC systems development in existing industrial buildings. There is presented selected industrial hall and its HVAC systems concept. The computer simulation using ESP-r software for different rates of ventilation by outdoor air helped to design an air-conditioning system, which comprises of daytime top cooling and night ventilation by outdoor air combined with accumulation of cold in building constructions. Capacity of mechanical cooling was decreased to more that 50% comparing to original design based on manual calculation for peak loads. The importance of internal gains measurements and investigation for industrial halls is presented as well

Design and commissioning of the low-energy office building in Prague

This paper deals with the use of computer simulations both for design support of a new building including its heating, ventilation and airconditioning (HVAC) systems and for optimization of the HVAC control strategy during operation of the completed building. In the early design phases for a new commercial building in Prague computer simulations were carried out in view of possible effects of night cooling ventilation. Predictions of the indoor environment and energy consumption for various options regarding cooling capacity and different outdoor ventilation rates supported the HVAC system design which included daytime top cooling and night ventilation with outdoor air combined with accumulation of cold in building constructions. After completion of the building, occupants' complaints and a set of measurements indicated some problems with the HVAC, which were subsequently solved. Long-term monitoring and further computer simulations were performed in order to optimize the control strategy of the top cooling system

Simulation to support passive and low energy cooling system design in the Czech Republic

This paper deals with the passive and low energy cooling technologies in the Czech Republic. The role of computer simulation in low energy building design and optimization is discussed. The work includes buildings and systems analysis as well as climate analysis in order to estimate the potential of passive and low energy cooling technologies. The former is based on case studies, which include both building simulation and monitoring

Analytical approach to transient heat conduction in cooling load calculations

The paper briefly reviews four existing analytical methods for the solution of the Fourier’s equation in cooling load calculations. The performance of nine different procedures (the four methods and their modifications) is presented on an example of heat transmission through a heavy wall under realistic external conditions. For the current case it was proved that the admittance method gives results similar to those obtained by the periodic response factors (PRF) approach, which is normally considered to be more advanced. Possible errors were found in the previously published coefficients for one of the PRF modifications