NDJ Sustainable
Engineering,  LLC

FAQs

We improve infrastructure sustainability in energy efficient buildings and transportation systems, and provide engineering consulting services.

Frequent Asked Questions

You could find answers for most of your concerned questions.

    When can we buy NDJ's BIPVT solar panels?
    Does NDJ's BIPVT system have any limitation about the application areas and climate conditions?
    What is the advantages of the NDJ's BIPVT panels compared with traditional solar panels?
    How does the OMITS app work?

    When can we buy NDJ's BIPVT solar panels?

  • We are conducting intensive research and development to validate the manufacturing and integration method. We expect our BIPVT solar products will hit the market in about two years.

  • Does NDJ's BIPVT system have any limitation about the application areas and climate conditions?

  • NDJ's BIPVT system was designed to be a versatile system with several design parameters, which can be tuned for different climate conditions and energy needs. Using the environmental chamber in the Carleton Laboratory, we can simulate different climate conditions and optimize the design of the BIPVT system for high performance. However, if the local electric system allows bringing solar energy to the smart grid, it may significantly save the cost of the BIPVT system in energy storage.

  • What is the advantages of the NDJ's BIPVT panels compared with traditional solar panels?

  • The advantages of our BIPVT panels are listed in the following table.
  • Feature Advantages Benefits
    Thin film silicon PV cells Lightweight, cost-effective, good workability & availability Reach acceptable electric efficiency 8-15% for a temperature range ~ 85C at a low cost.
    Water flow system Solar heat harvesting and temperature control Harvest 54% solar heat efficiency in summer time and keep PV <45C for better PV efficiency.
    Water flow control Using water flow to control roof temperature Defrost/deice roof surface for energy generation and reduce thermal strain for longevity.
    Functionally graded material layer Continuous variation from metal rich region to polymer materials for multi-functions Transfer heat into the water flow through metal rich region but block the heat flux by the thermal insulating polymer material for thermal comfort.
    Fiber reinforced lightweight concrete substrate Using foamed post-consumer plastics as aggregate for lightweight concrete with sisal fiber as reinforcement. The lightweight (specific gravity ~1) and good strength (compressive ~1ksi) enable us to fabricate large solar panel (2' by 8') for excellent workability at a very low cost (~0).
    Building integrated roof design Integration of structural sheathing and solar energy collector into one element Eliminate material redundancies for low cost, high performance, good workability, and easy maintenance.
    Modular design of the layered system Thermal, acoustic, and water insulation combined with energy harvesting Easy to recycle the useful components of the panel at the end of the lifetime or replace the damaged part during the service life.
    General design concept Adaptive to future PV technology and materials Different types of PV cells and materials can be integrated into the panel for life cycle benefits.

    How does the OMITS app work?

  • The OMITS app will be created for smart phones like iPhone and Android phones. The user, either driver or rider can run the OMITS app to communicate with other users to ask for riding or provide driving service.

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