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South Tama High School sees $51,000 savings in heating costs

New Computer Controls Come Through Big

March 13, 2014
By Joyce Wiese - Chronicle Correspondent , Toledo Chronicle, Tama News-Herald

The South Tama School Board received a report from Rick Nickelson on the first year operation of the EPM CTC (Computerized Temperature Control) system at the South Tama High School. Nickelson says the total CTC System Savings through first year totaled $51,153. The report was received on March 3.

The utility savings projected when the computerized temperature control system was purchased was 20.85 percent and the actual savings is 22.68 percent.

Boiler Replacement

Article Photos

Next up is possible replacement of the high school boiler. A public hearing on plans and specifications, contact and costs is set for this Monday, March 17. The hearing will be in the Professional Learning Room at the South Tama Partnership Center, 215 West 9th St., Tama, at 5:30 p.m.

The first year reports are based on the building use patterns, percentage of heating and air conditioning loads compared to total building energy loads and current and prior building heating and air conditioning operation.

If the building or heating and air conditioning equipment has changed the base usage must be changed in the analysis to account for the building changes. If the building or the heating and air conditioning have not been changed, they are not considered in the analysis.

The savings calculations are also based on the heating and air conditioning load compared to the total building energy load and the difference in heating and cooling degree-days. The use of the building and type of heating and air conditioning determine the percentage of the total building energy load represented by the heating and air conditioning. Depending on the building, this percentage will usually be between 30 per cent and 70 per cent. Once the heating and air conditioning percentage load is determined, the weather degree-day corrections are applied against the heating and air conditioning load.

A degree day is the average daily temperature departure from 65 degrees. As the degree-days vary from day to day, month to month and year to year, the energy used for heating and cooling vary accordingly. However, only a percentage of the variation of the degree-days can be applied to the energy used by the heating and air conditioning. This is dependent upon the building's insulation, type of heating and air conditioning equipment and fresh air used.

These calculations are applied to the energy used as shown on each year's utility bill. To determine the energy cost savings the current cost is applied against the energy units saved to obtain the energy dollars saved. If the energy cost from the prior year to the savings year were used the saving obtained could be skewed.

The internal rate of return uses 15 year computerized temperature control life and 3 percent annual increasing costs. The job included the one-time replacement of all the equipment actuators. The second and subsequent years will only include the difference in annual maintenance cost of the newer actuators.

The job was done in compliance with the federal prevailing wage adding money, allowing the district to receive matching funds for the installation. Adjustments for heating and air conditioning equipment repaired with the installation of the CTC system. No allowance was made for increased energy usage for replacing bad actuators.

The EPM has been manufacturing the computerized temperature control systems for over thirty-five years in Fulton, Missouri.

If the building or heating and air conditioning equipment has changed the base usage must be changed in the analysis to account for the building changes. If the building or the heating and air conditioning have not been changed, they are not considered in the analysis.

The savings calculations are also based on the heating and air conditioning load compared to the total building energy load and the difference in heating and cooling degree-days. The use of the building and type of heating and air conditioning determine the percentage of the total building energy load represented by the heating and air conditioning. Depending on the building, this percentage will usually be between 30 per cent and 70 per cent. Once the heating and air conditioning percentage load is determined, the weather degree-day corrections are applied against the heating and air conditioning load.

A degree day is the average daily temperature departure from 65 degrees. As the degree-days vary from day to day, month to month and year to year, the energy used for heating and cooling vary accordingly. However, only a percentage of the variation of the degree-days can be applied to the energy used by the heating and air conditioning. This is dependent upon the building's insulation, type of heating and air conditioning equipment and fresh air used.

These calculations are applied to the energy used as shown on each year's utility bill. To determine the energy cost savings the current cost is applied against the energy units saved to obtain the energy dollars saved. If the energy cost from the prior year to the savings year were used the saving obtained could be skewed.

The internal rate of return uses 15 year computerized temperature control life and 3 percent annual increasing costs. The job included the one-time replacement of all the equipment actuators. The second and subsequent years will only include the difference in annual maintenance cost of the newer actuators.

The job was done in compliance with the federal prevailing wage adding money, allowing the district to receive matching funds for the installation. Adjustments for heating and air conditioning equipment repaired with the installation of the CTC system. No allowance was made for increased energy usage for replacing bad actuators.

The EPM has been manufacturing the computerized temperature control systems for over thirty-five years in Fulton, Missouri.

 
 

 

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