Application of Information Technology in building energy consumption Assessment

Application of Information Technology in building energy consumption Assessment

Ivy

Abstract:

How to use residential and commercial buildings in the early stages of designBIM(Building Information Model) to simulate the energy consumption of the entire building for different design schemes. How to consider the construction cost and energy consumption cost from the whole life cycle of a building.

Background:

Many factors should be taken into account when designing a building, such as the surrounding environment and landform of the building, the structure and equipment system of the building itself, the requirements for sound, light, heat, water, heating, and electricity, as well as relevant national and local laws and regulations, thus the professionalism and complexity of the building system, it poses various challenges to the preliminary design. If there are design deficiencies, it is almost impossible to change the architecture after it is put into use.

We only take the design of the building's thermal environment as an example. How do design institutes or developers' designers consider it? First, obtain various factors that determine the Energy Performance (energy generation and consumption) of a building, such as climate, people, envelope structures, materials, structures, lighting, building shape, and ventilation, heat retention coefficient of a single materialSFor example, the following calculation method is used to obtain the value of a parameter:S. The sub-parameters are described as follows:

AQ-- Amplitude of surface heat flow, °C;

Aθ -- amplitude of the surface temperature wave, °C;

C-- Material specific heat,W·H/(kg·K );

PO-- Dry density of materials,Kg/m3;

Z-- Heat cycle,H.

If you accumulate the seed parameters,More than parameters affect energy efficiency indicators. At the same time, the impact on energy performance cannot be simply accumulated by the performance of several kinds of energy-saving insulation materials. It is a comprehensive system of interaction.Energy to buildingAlgorithmComplex, large computing capacity, complex relationships.

As a result, energy efficiency computing is usually arranged in the final stage of design. Professionals will manually input a large amount of professional data into the energy (energy consumption) simulation software for modeling, energy analysis and simulation, however, it is difficult to change the architectural design scheme.The final energy analysis becomes a symbolic gesture, which is beyond the reach of architects.

Solution

It can be used at the initial stage of design.BIMTool software to form a buildingBIMCommonly used international softwareRevit, Bentley, graphisoft archicad, 3D contentcentral.SlaveBIMExtract the building model from the format file for energy-saving design, energy analysis and simulation. For example, the parameters such as the Building Shape Coefficient and window-wall ratio are automatically calculated, and various design parameters such as doors, windows, walls, roofs, columns, and rooms are directly read from the architect's architectural design, in this way, the workload of manually inputting data by architects can be minimized, and energy-saving design can be gradually deepened in different design stages, such as the scheme, expansion and construction drawing.

ThereforeBIMCombined with the energy analysis simulation software, you can perform intuitive and Quantitative Energy Analysis at different stages of the design, reducing manual input parameters and secondary modeling, complex calculation formulas and input conditions, such as climate data, are also undertaken by the analysis software.

Next, let's look at an example:

1,Select an office buildingBIMModel

2,SetBIMInHVAC(Heating, ventilation and air conditioning,Heating, ventilation, and Air Conditioning Engineering).

3,Perform energy Simulation Analysis,Computing power consumption cost(Annual Fee and full life cycle energy consumption fee),Peak electricity usage of Buildings,And full-lifecycle Electricity Consumption,Carbon dioxide emissions, etc.,The data can be broken down to every detail..,For example

 

Therefore,Qualitative and quantitative simulation analysis and calculation can be performed on the design scheme, making it possible to design an energy-saving Eco-architecture. Through layer-by-layer decomposition of Energy Consumption Analysis, the energy consumption improvement focus is found, and targeted optimization solutions are proposed;

Concepts:

Green building (Green Building)Improves the efficiency of resources (energy, water, land and materials) used by buildings throughout the life cycle of a building, and reduces the impact of a building on human health and the environment, from better site selection, design, construction, operation, maintenance, and demolition, this entire building life cycle is complete. Sustainable development/Sustainability is a feature of green buildings.

 

BIM is the "Building Information Model "(Building Information ModelingUsing Bim technology and architects for design is the process of building a real building. Can be based onBIMSimulate the overall building (Group) construction plan and manage the structure and equipment (procurement, installation, post-O & M, model, parameters, and instructions for use ), various energy, water, and material consumption calculations are carried out to truly achieve full-lifecycle construction, sales, leasing, and operation management, and preliminary measurement of economic indicators can be carried out, such as construction cost, operation cost, rental calculation, and property operation cost.

 

Email: itgreenbim@gmail.com