Hospital Case Study - Energy savings

Energy savings resulting from cleaned coils and filtration upgrade.

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

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

Actual annual electricity cost: $ 1,650,947

Electrical energy savings: $ 601,553        ←

 

 

 

 

 

Budgeted* annual gas & oil cost: $ 1,057,800

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

Actual annual gas & oil cost: $ 600,647

Gas & Oil energy savings: $ 457,153         ←

 

* 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.