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Demand for commercial storage for peak shaving is on the rise.

pv magazine updated market overview of commercial and grid storage systems. Polysun is mentioned as a simulation software for storage integration.

The demand for commercial storage for peak shaving is on the rise. pv magazine updated its market overview providing interesting insights: Manufacturer prices decreased by an average of five percent. The market is still small in absolute numbers – but with a strong trend towards growth. That is what we at Vela Solaris are also experiencing: The demand for simulation of energy systems with storage capacities is increasing! With Polysun it is possible to show the impacts of storage integration on the increase of solar self-consumption, peak-shaving for grid fee reduction or on the integration of electric vehicles. We are pleased to be the only simulation software listed in pv magazine’s current market overview.

Learn more about the market overview of pv magazine:

SunPeople project builds energy simulation platform – using the Polysun API

The Interreg FCE SunPeople project aims to increase the development of a decarbonised heat energy service in the residential and commercial sectors. The project’s objective is to demonstrate and test on 15 sites, in Plymouth and Lorient, a cost-competitive, sustainable heat energy service based on heat pump and solar technologies. This service will enable to reduce carbon emissions on these sites an estimated 62.8 tons of carbon over a one-year contracting period corresponding to the project.

The service will rely upon a building energy simulation platform to scale up the zero-emission heating industry. The simulation of building energy schemes will be carried out using the Polysun simulation by Vela Solaris in the cloud (Polysun API).

comparing energy systems

The SunPeople project including the reference simulation platform approach relying upon Polysun software was introduced by Vela Solaris and ALOEN at this year’s conference of the European Heat Pump Association (EHPA) on Digitalization in the H&C industry, on March 9 2021.

Missed it? Access the slides here.

Further information on the Interreg FCE SunPeople project: Link

Polysun is accredited by Minergie

Our simulation software Polysun is now officially accredited by Minergie for the calculation of PV yields.

Minergie is committed to quality assurance in the planning, construction and operating phases of buildings in Switzerland. The three building standards Minergie, Minergie-P and Minergie-A already set clear requirements in the planning phase with regard to quality, efficiency and comfort. Today, depending on the region, 10% to 25% of new buildings are planned according to Minergie.

For the verification of the PV yield, Minergie wants to ensure a comprehensible and uniform verification of the Minergie applications. We are very pleased that our simulation software Polysun is now officially accredited by Minergie as a calculation tool for the verification of PV yields.

Polysun takes into account the efficiency of the modules, the orientation and size of the plant, the exact location and relies on current weather data for the PV yield forecast. With Polysun, even higher yields than the standard value of 800 kWh/kWp can be claimed. In Switzerland, yields of 1,000 kWh/kWp and more are possible at most locations. It is therefore worthwhile to calculate PV yields with Polysun and use them for Minergie applications.

Source: Minergie

Would you like to learn more? Just get in touch with us:

Polysun goes BIM: The new Polysun release increases planning quality!

The actual software release of Polysun makes the use of simulation of energy systems in digital planning even easier.

The digital simulation of energy systems generates a clear added value: various aspects are tested at an early stage and the quality of the planning increases. This significantly reduces investment and operating costs.  The current release of Polysun makes the use of simulation in digital planning even easier: relevant information on the current planning status is available at the push of a button. The fulfilment of set requirements for the energy system is immediately visible. Data import and export is automated and supports interdisciplinary teamwork. This also enables, for the first time, the seamless integration of energy system simulation in BIM projects.  Simulation results can be generated and validated even faster. As a digital twin, the planning data is reproducibly available and generates added value right up to the operating phase. This makes quality control easy! Our development partner, the engineering services company Amstein & Walthert confirms: “This makes planning energy systems a pleasure! We were able to test Polysun-BIM on a concrete construction project and see great potential in using the software!”

Highlights of the Polysun software release, version 12, with Polysun BIM Add-On:

  • Polysun-BIM supports automated data exchange. Meteorological data, heating load data and simulation results are thus available to the project team at the desired location at all times.
  • The data import is subject to an automated quality check. Implausible and incomplete data are recognized immediately.
  • Key performance metrics (KPM) from the construction project are defined for the energy system in Polysun on a project-specific basis. The achievement of set KPMs and deviations are available at any time at the push of a button.
simulation software in BIM projects for designign energy systems
New Polysun BIM add-on is available: test now for free!

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Clever use of simulation in BIM projects: This makes planning fun!

BIM (Building Information Modeling) raises high expectations for time and cost savings and for improved planning reliability. In a joint project by Amstein + Walthert with Vela Solaris and with the financial support of EnergieSchweiz, it was examined how concrete added value can be created in practice. A decisive success factor is the combination of simulation and BIM. The corresponding use case will be made publicly available through Bauen Digital Schweiz.

The demands on buildings are increasing: With consequences for planning

Today’s buildings must meet increasing requirements: They should offer a high level of comfort, convince with modern architecture and at the same time be energy-efficient and profitable to build and operate. For planning, this means that different disciplines must work closely together to ensure high planning quality. For this to succeed, two things are essential:

  • Define targets at an early stage:  From the client’s point of view, the objectives for the overall project must be available as early as possible and translated for the individual disciplines from architecture to building services engineering.
  • Enabling flexible changes to targets: If the requirements of a project change, the relevant information must be made available to the project team immediately and reliably.

This is the only way to ensure that deviations from targets are recognized by the project team and addressed at the lowest possible cost.

Simulation as a success factor for reliable planning

This is exactly where dynamic simulation of energy consumption and the satisfaction of demand by energy systems comes in. In time steps down to a second basis it is simulated how the planned energy system behaves during operation: From the heat stratification in the storage tank to the use of the solar system’s electricity production.

By means of simulation, it becomes clear at the push of a button whether a changed initial situation – caused by new requirements during the project – will lead to a deviation from the target specifications. If, for example, the usable roof area is reduced or the building use is changed, it can be simulated immediately what this means for energy consumption and energy system technology and whether adjustments are necessary. This increases the planning reliability and thus the confidence of the client in the planning.

But what does this mean in connection with BIM? What are the advantages of linking BIM with simulation? And how can processes and tools support this?

Amstein + Walthert and Vela Solaris are taking the next step. In a joint project, supported by EnergieSchweiz, the planning process was expanded in the area of model-based performance optimization and the Polysun simulation tool for process support was optimized.

Model-based performance optimization (MPO): BIM and simulation cleverly linked

The use case “Model-based Performance Optimization – MPO” from Amstein + Walthert combines the specialist areas of building simulation, energy system simulation and building services engineering planning. The main focus here is on enabling planning adjustments at any time and in frequent iterations – consistently across all specialist areas.

The MPO skilfully combines planning with simulation, taking advantage of the benefits of the BIM methodology: planners, simulation and BIM experts and project managers at Amstein + Walthert as well as experts for energy system simulation from Vela Solaris have contributed their knowledge to the MPO. The most efficient workflows and corresponding interfaces between different departments were jointly defined. This was done with the aim of enabling the seamless exchange of simulation results and thus increasing planning reliability. As a result, the MPO automatically links the required information and simulation results, documents changes and makes planning work in the BIM project more transparent. Frequent iterations of the planning and simulation results are now even easier to perform and facilitate efficient work for all project participants. 

The MPO has been successfully tested on projects currently in planning. The project team is convinced of the gained process efficiency and quality.

The Open-BIM-based use case will be published on Digital Switzerland and buildingSMART Switzerland. The MPO method is thus available to all interested parties, can be continuously improved and is easy to use.

Smart processes need smart tools

The simulation software Polysun from Vela Solaris has been successfully used by Amstein + Walthert for years for the simulation of energy systems for buildings and districts. In the joint project described here, Polysun was made BIM-capable and thus ideally supports the MPO process.

Open-BIM interfaces enable a largely automated data exchange. Simulation results are thus available to the project team at the desired location at any time and are transferred to the BIM model of the building services engineering. As a result, only time for planning has to be spent if deviations from the target values occur – the planning time is significantly reduced. Polysun also provides digital support for the evaluation of the achievement of building services engineering targets.

All simulation results remain transparently documented with Polysun BIM and provide added value right through to the operating phase – for simple quality assurance.

Energy system simulation is easy to use

With the new MPO and Polysun BIM from Vela Solaris, it will be much easier for simulation experts and planners to accurately design systems for today’s buildings. Relevant information is exchanged digitally. Tedious data quality checks are no longer necessary.

System support makes deviations from targets immediately transparent and the expertise can be directed to the essential points – for a high level of planning reliability that is convincing. This makes the use of simulation in planning a pleasure!

We would like to thank Amstein + Walthert for the great cooperation and EnergieSchweiz for the project support!

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