EnergY EfficienCY Measure ECO EMS N. 0.02 MOTOR purchase POLICY |
| ENERGY SAVING AREA:
COMPONENT CATEGORY:
Efficiency Improvement
ACTION TYPE(S): Replace / Install |
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| TECHNICAL DESCRIPTION | COST INFORMATION | EVALUTATION & DECISIONAL PROCEDURES | COMMERCIAL INFORMATION |
TECHNICAL DESCRIPTION
DESCRIPTION of the Measure (Suggested Action): Electricity costs of an electric motor over its working life can be 100 times the initial purchase price, so selecting motors with higher efficiency can rapidly repay the cost of specifying a higher efficiency motor. Currently a premium up to 20% may be charged for a HE motor. However, this premium is becoming lower and lower as the HE motors become more commonly used.
Replacing a standard motor with a High Eff one is essentially o lost-opportunity resource. All too often, optimisation of motor system is neglected because of inadequate time or expertise. Optimising a motor system or simply decide to buy a HE motor requires knowledge of electrical and mechanical engineering, computer techniques and practical experience with the particular systems and processes affected. Therefore, it is necessary to set up precise and detailed guidelines for the purchase policy ion order to ensure that the motor system is always optimised. Periodical review of such guidelines must be carried out to ensure that the criteria chosen continue to be valid throughout the time.
TYPICAL APPLICATIONS: All companies involved in operating or manufacturing industrial or commercial equipment which uses electric motors, e.g. air conditioning equipment, drive systems, etc.
CAUTIONS SUMMARY and CONSIDERATIONS: The implementation of a purchase policy must involve not only the factory or department manager, but also the Operation and Maintenance responsible persons and to inform all the staff concerned with motors.
PROBLEMS due to LACK of THIS ECO (Background): Maintenance staff, without any engineering analysis, usually takes the replace/rewind decision. Often the same brand and model is chosen for replacement. Each time a motor fails and the decision is to replace the motor instead of replacing it with a High Efficiency Motor and wrong decision is taken, an improvement opportunity and lack of profitability is lost.
SIDE BENEFITS: Proper replacement planning and policy allow a more careful investment plane.
DISADVANTAGES: Some time and effort required to set up policy/system
IMPLEMENTATION COST: Some small costs are needed in setting up the purchase policy, which will be repaid in short period of time
COST EFFECTIVENESS: Payback on effective policy is in the order of 1,0 - 1,5 years.
O & M REQUIREMENTS AND RELATED COST VARIATION: No cost variation on O&M
REMARKS on COST FACTORS. Small costs are needed to adopt HEM's to replace standard motors - foot print of motor, etc
DECISIONAL & EVALUATION PROCEDURE
iMPLEMENTATION STRATEGY: Policy can be adopted at any time. Decisions made about size threshold of motor to be replaced by High Efficiency Motors should be made and incorporated into policy.
IMPLIED ECOS: ECO-EEM 01 Replace existing motors with High Efficiency ones and ECO EEM04 Motor repair policy
GENERAL COMMENTS and RECOMMENDATIONS: Where motors widely used in industrial plant, motor purchase policy is a good thing to implement.
BASELINE TECHNOLOGY to be upgraded: No purchase/replacement policy
AUDIT & IMPLEMENTATION DECISION PROCEDURE: The decision to implement an energy efficiency policy should be based on the size of a careful estimate of the cost-effective savings obtainable from the implementation of such a policy in the company. First of all, the assessment should be made by checking, how and how frequent replacements of old motors occur. Secondly, what is the common practice when a motor fails and what is the importance and costs associated to production downtimes. The purchase policy should also determine on the basis of the estimated motor lifetime, motor size and operating hours, repair and replacement HEM costs, the threshold under which the motor stock is replaced and above which motors are rewinded.
ENERGY SAVING POTENTIAL: High standard of purchase provides 0.5 - 1% savings
ENERGY SAVING EVALUATION PROCEDURE: The energy saving can be estimated by summing up the energy savings obtainable from the replacement the most important motors working more than 1000 hours/year with HE ones.
EX-POST ACCEPTANCE & PERFORMANCE COMPLIANCE CHECK PROCEDURE: The ex-post evaluation can be made by measuring the energy consumed (power x operating hours) and comparing with the adjusted baseline. Adjustments needs to be made to take into account variations in operating hours and in installed power occurred for production changes.
USER INFORMATION and COMMERCIAL ISSUES
PURCASE AND O&M PROBLEMS: The nearest dealers of HEM must be searched for.
ECO ENVIRONMENTAL IMPACT & CONSTRAINTS: The implications of scrapping motors rather than repair can be justified as a result of the CO2 savings from more efficient units
USER'S/ CLIENT's ACCEPTANCE: Simple - Policy not likely to cause major concern
EASE OF USE: No problems at all
PRACTICAL IMPLEMENTATION PROBLEMS: Change in Operating & Maintenance practices may need to be adopted and source of purchase may need to be changed.
OTHER NON-TECHNICAL BARRIERS: Larger companies are keener to implement a purchase policy. A barrier can be the common rule to replace small motors and rewind large motors. A policy could redefine the threshold between small and large motors. Another barrier can be due to the invisibility or low importance given to energy expenditures. In this case the company management and the operating staff have lack of incentives to implement any kind of energy saving on motor systems.
COMMERCIAL INFO. ON MANUFACTURERS: Companies with HE motors on sale needs to be actively sought and motor performance compared. Use EURODEEM database for this.
REFERENCES, LITERATURE & LINKS: