Method and system for evaluating the efficiency of an air conditioning apparatus
First Claim
1. One or more non-transitory computer-readable media containing instructions that when executed by a computer evaluate the performance of an air conditioning chiller having a compressor and a plurality of components including a condenser and an evaporator by performing steps comprising of:
- A. receiving performance data for the compressor and each of the plurality of components;
B. for each of the plurality of components, calculating a component loss value using at least one of a plurality of relationships correlating performance data with an efficiency loss;
C. calculating a chiller loss value based upon a plurality of the component loss values.
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Accused Products
Abstract
The applicant describes a system and methods of calculating the overall operating efficiency of an air conditioning chiller that evaluates efficiency of the component parts of the chiller and generates an overall efficiency based on these component efficiency values. If the overall chiller efficiency is less than the maximum attainable chiller efficiency, the cost of the inefficiency is calculated and presented to the user. Recommendations for corrective action to restore maximum chiller efficiency are identified and presented to the user. The system also adjusts the efficiency calculations as appropriate to account for actual compressor current load conditions.
61 Citations
19 Claims
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1. One or more non-transitory computer-readable media containing instructions that when executed by a computer evaluate the performance of an air conditioning chiller having a compressor and a plurality of components including a condenser and an evaporator by performing steps comprising of:
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A. receiving performance data for the compressor and each of the plurality of components; B. for each of the plurality of components, calculating a component loss value using at least one of a plurality of relationships correlating performance data with an efficiency loss; C. calculating a chiller loss value based upon a plurality of the component loss values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A computerized method for evaluating the performance of an air conditioning chiller having a compressor and a plurality of components including a condenser and an evaporator, comprising the steps of:
- reading instruments measuring condenser parameters; and
A. receiving performance data for the compressor and each of the plurality of components, including receiving by a portable handheld device the performance data for the condenser based upon the condenser parameters; B. for each of the plurality of components, calculating a component loss value using at least one of a plurality of relationships correlating performance data with an efficiency loss; C. calculating a chiller loss value based upon a plurality of the component loss values; and D. sending the performance data for the condenser to a computing device that performs steps B and C.
- reading instruments measuring condenser parameters; and
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15. A computerized method for evaluating the performance of an air conditioning chiller having a compressor and a plurality of components including a condenser and an evaporator, comprising the steps of:
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A. receiving performance data for the compressor and each of the plurality of components; B. for each of the plurality of components, calculating a component loss value using at least one of a plurality of relationships correlating performance data with an efficiency loss; C. calculating a chiller loss value based upon a plurality of the component loss; D. reading with a portable handheld device the performance data for the condenser from a plurality of sensors that measure at least one condenser parameter, and E. sending the performance data for the condenser to a computing device; and in which steps B and C are performed by the computing device.
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16. One or more non-transitory computer-readable media containing instructions that when executed by a computer perform the steps comprising:
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A. receiving chiller data, comprising; i. an expected evaporator approach, ii. a compressor running current, iii. a full load compressor current, iv. an evaporator refrigerant temperature, and v. an evaporator outlet temperature; B. determining an evaporator loss value by calculating; i. a fractional current by dividing the compressor running current by the full load compressor current, ii. a full load evaporator approach by subtracting the evaporator refrigerant temperature from the evaporator outlet temperature and dividing the result by the fractional current, iii. an evaporator approach difference if the full load evaporator approach is greater than the expected evaporator approach by subtracting the expected evaporator approach from the full load evaporator approach, and iv. multiplying the evaporator approach difference by an evaporator approach loss factor to result in the evaporator loss value. - View Dependent Claims (17, 18, 19)
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Specification