Hospital Case Study – Energy Savings

OVERVIEW:

 

A large hospital in Buffalo, NY, saved $946,141.00 in energy by implementing an aggressive coil cleaning program in their HVAC systems and upgrading the filtration using high technology filters from Clark Air Systems, Inc.

 

Budgeted* annual electricity cost:$2,252,500
Actual annual electricity cost:$1,650,947  
Electrical energy savings:$601,553 
Savings are attributed to slower variable HVAC fan motors due to lower pressure drop on coil surfaces and filters.

Budgeted* annual gas & oil cost:$1,057,800
Actual annual gas & oil cost:$600,647
Gas & Oil energy savings:$457,153
Savings are attributed to lower boiler/chiller loading due to better heat transfer efficiency on clean coil surfaces.
Budgeted* annual electricity cost:

Actual annual electricity cost:

Electrical energy savings:

$2,252,500

$1,650,947

$601,553 

Savings are attributed to slower variable HVAC fan motors due to lower pressure drop on coil surfaces and filters.

Budgeted* annual gas & oil cost:

Actual annual gas & oil cost:

Gas & Oil energy savings:

$1,057,800

$600,647

$457,153

Savings are attributed to lower boiler/chiller loading due to better heat transfer efficiency on clean coil surfaces.

* Budgeted numbers were based on previous years’ actual usage.


Background:

  • Three-year evaluation of filter products concluded with the selection of high technology filtration from Clark Air Systems, Inc.
    • The keys to the selection of Clark Air Systems over the previous commodity filters:
    • The energy performance of the filters – by operating at a much lower pressure drop, significant electrical energy savings can be realized.
    • Longevity and life-cycle cost of the filters – high dirt capacity, microbial resistance, durability, and lower pressure drop allow the hospital to prolong the operational life of the installed filters.
    • Non-shedding, non-fiberglass final filtration, elimination of cardboard in all prefiltration.
    • Service, professionalism and expertise of the Clark Air Systems representative.
  • As the filter upgrade was implemented, a complete unit-by-unit cleaning was conducted on all HVAC internal surfaces including a thorough cleaning of all heat transfer surfaces.
  • Energy expenditures are taken directly from the Plant Operations Spectrum spreadsheets.

HVAC renovation with UV light system and Flex Seal coating

Location: Major Medical Center -Upstate NY

Units: Two circa 1970 HVAC systems

Clark Air Systems was asked to strip the old moldy, broken insulation, which had fallen into disrepair over forty years of service; install new insulation; physically clean the coils, and apply an ultraviolet coil sanitizer.

UV system: all lamp ballasts are outside the airstream tucked away in a NEMA 4 ballast box for easy service and safety.