The current legislative requirements in the building industry, the technology used in it, and the ever-increasing prices of energy carriers require more and more precise methods of determining ordered power and energy requirements for existing and planned buildings. Commonly used simple calculation methods often do not allow for a precise definition of the demand for heat or the amount of energy that will be consumed in the future by a projected or upgraded building. Increasingly, computer systems of simulation are used to precisely determine these quantities.
Computer energy demand simulation for buildings enables engineers, architects and researchers to model time-varying energy requirements for heating, cooling, ventilation and lighting of existing and planned buildings. Computer simulation systems also allow for the modeling of the demand for energy carriers and the water supplied to the facility. Modeling of variables during building performance allows people involved in the design of a new building or upgrading an existing building to make decisions that optimize architectural and installation solutions, leading to reduced energy and water requirements for the building being designed.
All calculations and energy analyzes of buildings and their energy supply systems are made using specialized software for energy simulations. For simulation calculations, EnergyPlus, ESP-r and calculation programs and procedures developed by experts and professionals working with the National Energy Conservation Agency are used. In order to increase the efficiency of the EnergyPlus energy simulation system, the DesignBuilder version of the Advanced Simulation Package and the OpenStudio Plugin for Google SketchUp are used to prepare the building model and analyze the calculation results. Both systems support the use of the EnergyPlus calculation engine, which has the following features:
Additionally, Design Builder allows to perform:
Energy analyzes and simulations of buildings can also be performed using algorithms in accordance with Polish and European standards. For this purpose, computational algorithms based on norms and computational libraries have been developed. The STEP ESS 2.0 computational energy library is a programming tool developed for the development of software for energy analysis in the building industry. Especially useful is the construction and development of software used to determine energy demand for heating and cooling of buildings for energy analysis and auditing of buildings and software used in the energy efficiency assessment of residential and public buildings. The Energy Simulation System (ESS) was developed under the STEP - Sustainable Thermomodernization of Public Buildings project. The ESS library uses two methods for determining energy demand for heating and cooling of buildings, developed in the STEP project. The first is an hourly method based on the mathematical model 6R1C of the building's thermal dynamics, while the second is a pseudodynamic balance method with a monthly computational period. The structure of the construction of computational kernel library STEP ESS 2.0 can be a central part of graphic simulation of building energy applications working in Windows ™.
The scope of energy simulation is adapted to the complexity of the projected or upgraded building and the type of technology that can be used. An additional parameter influencing the complexity of the applied model used in simulation and energy analyzes is the availability of input data. Energy simulations are also adapted to the design stage. Simplified energy analyzes are used in the early stages of building design, while complex energy analyzes are performed at the final stage or on an as-built basis.
Office building Tulipan House in Warsaw, the National Fund, the Ministry of Environment, Sheraton Hotel Warsaw, Main Building of the Center for Children's Health, Energy balance for the Temple of Divine Providence, SEGECE: the development of the Sadyba Best Mall, Krakow Plaza, Lublin Plaza, Poznan Plaza, Ruda Slaska Plaza, Rybnik Plaza, Sosnowiec Plaza
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