The mechanical system is based on roof mounted water source heat pump units with 100% outdoor air economizers. The heat absorbed / rejected at the units would be circulated with a 2 pipe condenser water loop with a plate and frame heat exchanger interface with the building’s hydronic hot water system. Compressors will be mounted in the units on the roof to isolate any mechanical noise from being transferred into the space. Individual zone control is accomplished by sizing the water source heat pump units to the served zone requirements and using roof mounted airside equipment to avoid noise in the space, to avoid taking up valuable floor space, and to reduce the possibility of vandalism in a school environment. Air distribution systems are sized in accordance with LEED “right sizing” techniques utilizing optimized energy performance, based on Trane Trace 700 computer modeling per ASHRAE 90-2004 envelope compliance and ventilation rates per ASHRAE 62-2004.
Heating for the water source heat pump is accomplished by adding heat to the condenser water loop serving the water source heat pumps from the central boiler plant. In the case of water source heat pumps, it would be possible to use geothermal as a heat source, if the site has geothermal available. The current design uses solar hot water panels to harvest solar energy to heat the buildings. Hot water solar panels output water temperatures that are ideal to heat the condenser water loop which is usually asked to perform around 70-80°F. Not only is this an environmentally friendly approach; the payback would be in the 3-5 year time frame. This heating system is supplemented with high efficiency condensing style boilers with redundant variable speed building distribution pumps.
Controls and Energy Strategies that work.
Three merging trends began to make designing with legacy control stragegies impossible: 1) the trend toward more factory mounted controls and less field installed components; which has led to finger pointing between vendors and control installation companies, as to what is provided and by whom? 2) the incorporation of more smart devices and communication protocols (see url) and 3) the desire to use more sophisticated control strategies that incorporate “smart” energy savings such as automated demand response and LEED building control strategies and features. Technical Designs set out to find a better method to manage this problem for our Clients. The result was the ability to write the building control software, test this software off line, hand this software off to the installing contractor and manage the commissioning process over the web from anywhere in the world. Using VMware and web tools, the engineers at Technical Designs that conceived how the building was to perform, now verify this in real time. Just as designing in 3D does not allow you to “fake” it, no longer will the engineer be allow to throw a few half baked ideas at the control contractor expecting everything to magically work.×
Integrated Project Delivery
Technical Designs became interested early on in the use of Integrated Project Delivery (IPD) . IPD is simply the use of web based tools that support consultants with specific expertise to collaborate on a single design model that exists in the cloud where team members have direct access in real time. This process could be applied to any type of project: from designing a circuit board to movie production. Technical Designs focused on what knowledge we bring to the process and developed the tools and skills necessary to support the building design process within the construction industry.×
Technical Designs are engineers... focused on what knowledge we bring to the process and developed the tools and skills necessary to support the building design process within the construction industry.×
Technical Designs are designers... focused on what knowledge we bring to the process and developed the tools and skills necessary to support the building design process within the construction industry.×
Building and Asset Management
Technical Designs makes it work... focused on what knowledge we bring to the process and developed the tools and skills necessary to support the building design process within the construction industry.×