Parkway School District: South High School

Solutions

Replacing fluorescent lights with more energy efficient LED lighting and occupancy sensors was a relatively simple way to decrease the school's energy use. Building envelope improvements included upgrading the insulation and installing new roofing. Geothermal energy is renewable and does not produce greenhouse gasses, so installing a new geothermal plant for the school lessened its environmental impact and helped to decrease overall energy use and expense.

Savings Measure	Cost	Savings Achieved	Notes
Geothermal/Chiller Plant Upgrades	$2,713,279	1,372,935 kWh	New heater-chiller plant to replace aging chillers and eliminate existing heating boilers. Borefield with 120 vertical wells 500 ft deep.
Building Envelope Upgrades	$70,585	160,466 kWh
LED lighting retrofits and controls	$191,136	420,177 kWh
75 kW solar PV array	$149,975	99,167 kWh	In addition to previously installed 25 kW array bringing total onsite capacity to 100 kW of rooftop solar PV.

Retro-commissioning work helped to identify where improvements and changes needed to be made to help the school's HVAC system conserve energy. Some of the changes involved making sure that equipment was running only when needed, and that sensors were properly calibrated.

Savings Measure	Cost	Savings Achieved	Notes
RCx - DAT/DSP Reset	$4,365	101,000 kWh	Create reset schedules for various AHUs, based upon Terminal Unit demand.
RCx – CO2 Control & TAB	$157,325	469,000 kWh	Utilize Existing CO2 Sensors to reduce minimum airflow requirements in spaces when unoccupied. Calibrate airflow sensors supplying excessive. Allow cooling minimum airflow setpoint to fall to 0 during unoccupied times.
RCx – RTE-014 On/Off	$2,800	171,000 kWh	Two units were running constantly due to existing setpoints –ON/OFF settings altered to ensure the units turn off during unoccupied.
RCx – Unoccupancy Setpoints and Temp Range Modifications	$5,265	16,400 kWh	Update setpoint that calls for the units to start during unoccupied times. Adjust the user controls of common spaces locking out adjustment controls to BAS only. Correct simultaneous heating and cooling in one of the air handlers.

ANNUAL ENERGY USE

(Source EUI)

ANNUAL ENERGY COST

ANNUAL WATER USE

ANNUAL WATER COST

ANNUAL PLANT ELECTRICITY USE

ANNUAL PLANT ELECTRICITY COST

IN BUILDING ENERGY USE

IN BUILDING ENERGY COST

ACROSS NETWORK USE

ACROSS NETWORK COST

ANNUAL EMISSIONS

USE

COST

100 kW of rooftop solar arrays provide clean energy to the building and help to reduce energy bills.

120 vertical wells are drilled 500 ft deep into a field adjacent to the building.

Students from Parkway South High School learn about geothermal energy at the test well built near the school in 2018.

Parkway School District: South High School

Related Content

100 kW of rooftop solar arrays provide clean energy to the building and help to reduce energy bills.

120 vertical wells are drilled 500 ft deep into a field adjacent to the building.

Students from Parkway South High School learn about geothermal energy at the test well built near the school in 2018.