# Presentation: 162582

## Foothill College &Space Science Center

**Bill Kelly**
**Viron Energy Services**
**(510) 538-4416 ext 13, bkelly@viron.com**

## Foothill College & Space Science Center

**Foothill Campus:  **
**484,000 square feet **
**Space Science Center **
**Built in 1965**
**Circular brick building**
**12,600 square feet on 2 floors**
**Community college classes & astronomical observatory**
**6 day a week operation, including night classes and evening observations**

- Space Science Center/
- Foothill Observatory

## Foothill College & Space Science Center Project Scenario

**The original buildings were designed for heating and ventilation only**
**When cooling was added, a separate systems for cooling in each building was installed**
**DX coils cut into H&V fan coil units with remote air cooled condensers **
**1.1 to 1.3 kW/ton**
**Space Science Center included heating only**
**No roof insulation**
**Older  lighting system**
**Constant air volume, no energy management system**
**Uncomfortable building **

## Foothill College & Space Science Center Baseline Electrical Energy Use

**Entire campus energy use**
**7 million kWh **
**14.5 kWh per square foot per year**
**$515,000 per year**
**average of $0.073 per kWh**
**High energy use and cost**
**For a campus where the majority of rooms are not air conditioned**

## Foothill College & Space Science Center Project Challenges

**Balancing energy cost savings with needed campus improvements (i.e. adding air conditioning)**
**Coordinating central plant and chilled water loop design with campus long term Master Plan **
**Keeping classrooms operational**
**Staging extensive construction on a busy campus**

## Foothill College & Space Science Center  System Solutions

**Two phase project**
**New chilled water loop to serve the entire campus**
**Upgrade HVAC & lighting systems in each building**

## Foothill College & Space Science Center New Chilled Water Loop 

**Central Plant is designed to serve 484,000 square feet & 57 buildings**
**The Central Plant will include:**
**R-22 rotary screw chiller, 0.65 kW/ton, 170 tons**
**R-123 variable speed centrifugal chiller, 0.55kW/ton, 350 tons**
**Variable speed secondary chilled water pumping**
**Chilled water loop piping**
**PVC, Direct Buried and in Tunnels  **

## Foothill College & Space Science Center HVAC System Improvements

**Space Science Center**
**Variable air volume system, including new built-up air handling system and air distribution system**
**Energy management system tie-ed into new campus-wide Novar system**
**Operates based on temperature settings, outdoor temperature, operating schedule  **
**Other HVAC improvements****	**
**100% outside air economizer system**
**New Boiler and hot water pump**

## Foothill College & Space Science Center Cooling Load Reductions

**Replaced existing lighting **
**New indirect T-8 fluorescent fixtures,  electronic ballasts**
**New LED exit signs**
**Occupancy sensors for classrooms**
**Added roof insulation**
**R-19 added to roof**

## Foothill College & Space Science Center Integrated Economics

**Long payback periods since most of the campus was not air conditioned and all improvements including major capital improvements.**

## Foothill College & Space Science Center Financing Structure

**Three primary funding sources**
**Municipal operating lease - 26%**
**Deferred maintenance bonds - 54%**
**Local bond - 20%**
**Utility rebates**
**$16,000 from 1998 PG&E Retrofit Express**
**$150,000 from 1998 PG&E Standard Performance Contract**

## Foothill College & Space Science Center Project Timeline

**Oct 97**

**Apr 98**

**Oct 98**

**Apr 99**

**Oct 99**

## Foothill College & Space Science CenterProject Results

**Reduced energy use by $0.27 per square foot**
**Maintenance costs down $4,500 per year (mainly for lighting)**
**New air conditioning, controls & lighting make building more comfortable and attractive**
**Maintained original campus architecture while adding air conditioning**