kilohana elementary: PV/AC project
- Overheating classrooms upwards of 90 degrees
- Outdated electrical infrastructure. Portable air conditioners provided would blow out the electrical.
- Uncomfortable classroom environments due to heat as well as accumulated noise from fans
- 8 x LEZETi Solar PV A/C's
- 24 x PV panels installed (6.24kW DC)
- Outdoor units mounted directly to the classroom exterior walls
- No major electrical upgrades required
ABOUT THE PROJECT: Thanks to a 6th grader’s presidential campaign promise to cool her school, 33 LEZETi solar hybrid air-conditioning units were generously donated to cool down several hot classrooms (up to 90 degrees) across two elementary campuses on Molokai. In-line with Governor Ige's statewide cooling initiative, this project cooled down 18 classrooms without requiring any major electrical upgrades to the outdated electrical infrastructure.
Kilohana Elementary received 8 solar A/C units installed in 4 different classrooms. Two units were installed per classroom. Outdoor units were mounted up near the eves. The buildings were mainly hollow block construction and were a determining factor in where and how the outdoor units were installed.
With the partnership of private industry and the support of the Hawaii State Department of Education (HIDOE), Kilohana Elementary School created better learning environments for their students with minimal impact to the grid. A win-win situation with summer just around the corner, the sun that formerly overheated the classrooms will now be powering its cooling system and with DC driven compressors, these units deliver ultra-quiet cooling to the classrooms. Projects such as these are only one example of the many cooling strategies the HIDOE is engaging in towards the public school heat abatement program.
On April 8th, Kaunakakai Elementary held a "Flip the Switch" Celebration event to celebrate the brand new solar hybrid air conditioners installed. Kilohana Elementary also joined in the celebration. View the news story videos that captured the ceremony and story at KHON and Maui Now News.
Some of the capstone accomplishments from this project include:
- Raising awareness about uncomfortable classroom temperatures
- Public/Private partnerships that benefited statewide classroom cooling initiatives
- Addressing concerns for long-term sustainable utility costs for the HIDOE
- Enhancing the classroom environment with a quiet and cool solution
This LEZETi solar hybrid A/C was a perfect fit for this project as the standard hours of school between 6am-4pm are also the prime sun hours for the system to draw on FREE sunlight to power the cooling of the classroom. With an average of 15-25 students per classroom, and aging electrical infrastructure, the need for a highly energy efficient A/C with silent operation and minimal grid consumption was key in helping to maintain a comfortable learning environment as well as sustainable long-term operating costs for the HIDOE.
Download: Kilohana Elementary PV/AC Case Study