Interoperable software makes it possible to seamlessly exchange data among different compliant applications. Seamless data exchange substantially saves time and resources that makes the use of energy software feasible in industry projects where it normally is not used.
This paper is about new features which where added to TRNSYS15 (Beckman, 2000) to improve its capabilities. For system simulations with TRNSYS15 now 6 new component libraries are available. Those Libraries include more than 160 new TYPES like solar, geothermal and HVAC components Also building simulations have been improved significantly. Thermally activated elements for heating and cooling are now integrated in the building model.
The integration of building Energy Simulation (ES) and Computational Fluid Dynamics (CFD) programs eliminates many assumptions employed in the separate simulations, resulting in more accurate predictions of building performance. This paper discusses the methods used to determine convective heat transfer on interior surfaces of building envelope, which links ES with CFD programs. The study found that the size of the first grid near a wall in CFD simulations is crucial for the correct prediction of the convective heat.
In recent years major advances have been made in the development of computational tools for architects to facilitate building performance evaluation. Most tools require expert knowledge and remain accessible primarily to building engineers or specialized architects.
Within the framework of energy management in a tertiary building, it is necessary to evaluate the possibilities of cold energy storage. This study includes the consideration of ice storage for the air- conditioning of the buildings. To compare objectively the operating strategies, the manager needs to reproduce the ISS performances for the same conditions (building, cooling and electrical demands, climate conditions,...).
This paper presents a simulation of a hybrid ground source heat pump system, performed using a new graphical user interface for HVACSIM+. Hybrid ground source heat pump systems incorporate both ground loop heat exchangers and supplemental heat rejecters, such as cooling towers, cooling ponds, or pavement heating systems. HVACSIM+ capabilities have recently been extended by the addition of ground loop heat exchanger models, water-to-water and water- to-air heat pump models, pavement heating system models, and heat rejection pond models.
In this paper, we present a new simulation program, TEKLA, for estimating energy use of residential buildings according to the European standard, EN832. The simulation program is written in MATLAB 6.2. The focus is to estimate variations of significant parameters influencing the energy use of the building. TEKLA can be used in design of new and retrofitted energy-efficient buildings. The model predictions are in good agreement with monitored data from an occupied residential building located in Umeå in northern Sweden.
In the summer of 2002, measurements were simultaneously performed to investigate the characteristics of heat flow in urban areas at three locations in Kyoto city: 1) a commercial urban area mixed with low-rise traditional residential buildings that represents the urban area of Kyoto, 2) an university campus area with a lot of green zones, and 3) a plaza covered with a concrete slab which was used as a reference point of measurement.
A good tuning between building and installations plays a major role in achieving energy savings and a high quality of the indoor climate. To realize this match, it is necessary to have tools that can be used from the very beginning of the building design, that support the decision making and that enhance the communication within the design team. Last but not least, these tools should match the psychology of the engineer. H.e.n.k. is a software tool that tries to respond to this demand.
This paper explores the integration of an algorithm for the simulation of ground-source heat pump systems into a whole-building energy analysis program. GS2000™ is a software program released in 1995 for the sizing of ground source heat pump ground heat exchangers (also known as earth energy systems, geothermal heat pumps, and Geo- exchange systems) (Morrison, 1997). GS2000™ performs the ground loop heat transfer calculation, but requires the monthly building loads – as calculated by an energy simulation program.
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