1 / 5

Whitman-Hanson Regional High School Energy Efficient Systems: HVAC

Whitman-Hanson Regional High School Energy Efficient Systems: HVAC. All fans and pumps are VFD controlled with fully reactive controls Condensing gas-fired boilers Condensing DHW One for bathrooms One for kitchen Both located close to the loads to reduce piping and pumping energy

indiya
Download Presentation

Whitman-Hanson Regional High School Energy Efficient Systems: HVAC

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Whitman-Hanson Regional High School Energy Efficient Systems: HVAC • All fans and pumps are VFD controlled with fully reactive controls • Condensing gas-fired boilers • Condensing DHW • One for bathrooms • One for kitchen • Both located close to the loads to reduce piping and pumping energy • Building uses less gas than one of the districts existing 8 classroom schools!

  2. Hybrid Chiller Plant • Hybrid chilled water system 200 Ton Evaporative cooled chiller and 200 Ton Air cooled • Carrier Hap Bin analysis showed peak of 419 tons but load for school year is 206 tons • Variable Primary Pumping for CHW & HW circulation • Money saved from not needing additional pumps was allocated to convert from 2 pipe change over to a four pipe system

  3. Mechanical Specialties • Boiler Room moved to reduce piping estimated $212,000 savings • CO2 based DCV controls in all Large Spaces (Green) • Building ventilation is DCV based upon space occupancy (lighting occupancy sensors control VAV boxes setback) • Energy Recovery Unit for Auditorium as well as DCV

  4. Commissioning Design Team Goal: Integrate commissioning throughout the project to assure success in achieving project goals. • Traditional construction commissioning performed by the design engineer: All systems operational • The electric utility’s commissioning agent contract was extended to do functional testing after occupancy and within season for equipment. • Within the warrantee year, found issues with many parts of the mechanical systems • Associated suppliers/ vendors extended warrantee due to commissioning documentation • This was money well spent!

  5. Other unique features • Johnson Medysis Energy Management System (EMS) • School district allowed sole-source bid to allow connection their five other schools currently using the Medysis system • School district has a part time energy manager who assisted in testing and operation of systems • Students do much of the energy analysis • Earth Science students monitor CO2 levels and water collection • Physical science students monitor electric production • Math students graph the data collected from trend logs on EMS and electric production from PV for other students to analyze

More Related