POOL PROJECT SPOTLIGHT
Project Name: Wheaton College Haas Athletic eCenter
Location: Norton, MA
Installed by: RES Solar
In August 2017, Wheaton College’s Haas Athletic Center leveraged an $89,600 dollar rebate from the Massachusetts Clean Energy Center’s Commercial-Scale Solar Hot Water Program to install solar hot water collector. The system uses a 1,248 square foot array of SunEarth Flat Plate Collectors, installed by Renewable Energy Systems, to heat the athletic center’s indoor Olympic sized pool and locker room with showers and restrooms that is used by the athletes. The system is expected to save the school $30,000 while reducing carbon and saving up to 3,912 therms per year. Finally, the system’s design allows either the pool or the hot water supply to be heated to different temperatures depending on weather conditions, which will greatly increase energy efficiency.
Energy Metering Results
Four Months of Therm production on the system are as follows:
Drainback with 360 gallons of DHW storage. Pool is 75' x 40', heated to 82-85 degrees
Two Onicon Revenue Grade meters are used for btu production numbers. One on the DHW side and one on the pool. This data is then sent to the Thermal Grid web based platform via the Resol DL2 datalogger
Location: Wheaton College - Haas Athletic Center - 26 E Main St, Norton, MA 02766
Application: CombiSystem - Direct Hot Water and Pool
Rated Power Output: 39 x 32.8 ft^2= 1279.2 /10.76 *0.7= 83.2 kw
Yearly Energy Output (kWh) = 118.8847583643*3.81*.44*365= 72,744 kwh
Solar Collectors: 39 SunEarth Thermoray (TRB-32) Flat Plate Collectors
System Format: Closed Loop Drainback
Storage Capacity: The DHW solar storage is 360 gallons. Olympic sized Swimming Pool is 75'x40' holding 258,750 gallons.
Metering: Two Onicon Revenue Grade meters are used for btu production numbers. One on the DHW side and one on the pool. This data is then sent to the Thermal Grid web based platform via the Resol DL2 datalogger.
LAS LOMAS HIGH SCHOOL
Project Name: Las Lomas High School Solar Project
Location: Walnut Creek, CA
Project Developer: Maktinta Energy
CSI Thermal Rebate: $133,000
Las Lomas High School is a public high school in Walnut Creek, California, United States. It was founded in 1951 by the Acalanes Union High School District, and opened its doors in the fall of 1952 to its first graduating class. Las Lomas was the second of five schools built within the Acalanes Union High School District.
Reducing Carbon Emissions and Accelerating STEM Concepts
The solar array of 188 collectors provide heat to the school's pool year round. The system deploys a Solar Brain controller operating the solar pump via a variable frequency drive to adjust the flow through the solar array to maximize heat production. System is self-monitoring pushing notification to the installer and the maintenance team when it detects any divination from normal operating range.
Having solar at school sites creates additional opportunities to focus on green education, environmental responsibility and clean energy, exposing the students to even more STEM-related curriculum and concepts. The system provides 24,000 Therms/Yr with total savings estimated at $36,000 annually eliminating 4,800 metric tons of carbon emissions
Location: 1460 S Main St, Walnut Creek, CA 94596
Solar Collectors: 188 SunEarth Oasis PP 48 Collectors
System Format: Solar pre-heated water for pool & Locker Room's
Pool Size: 310,000 gallons
Controller: Maktinta Solar Brain
Metering Equipment: Maktinta solar Brain
Pump: 10 HP
Variable Frequency Drive (VFD): Pentair
Annual energy Savings: 19,027 Therms
CSI Rebate: $133,000
Rated Power Output: 47.25ft2*160 =7,560ft2/10.76 * 0.7 = 491.82kwh