Search results
Results From The WOW.Com Content Network
The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. [1] [2] Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs. The COP is used in thermodynamics.
Typical EER for residential central cooling units = 0.875 × SEER. SEER is a higher value than EER for the same equipment. [1] A more detailed method for converting SEER to EER uses this formula: EER = −0.02 × SEER² + 1.12 × SEER [2] Note that this method is used for benchmark modeling only and is not appropriate for all climate conditions ...
The formula for ESEER can then be presented as follows: ESEER = (EER@100% load × 0.03) + (EER@75% load × 0.33) + (EER@50% load × 0.41) + (EER@25% load × 0.23) [ 1 ] Eurovent publishes EER and ESEER values in its Directory of Certified Products together with cooling capacity and power input for standard conditions at full load for a wide ...
The HSPF is related to the non-dimensional Coefficient of Performance (COP) for a heat pump, which measures the ratio of heat delivered to work done by the compressor. The HSPF can be converted to a seasonally-averaged COP assuming a lossless compressor and no heat loss by multiplying by the heat/energy equivalence factor .29307111 W·h per BTU.
The reason the second-law efficiency is needed is because the first-law efficiencies fail to take into account an idealized version of the system for comparison. Using first-law efficiencies alone, can lead one to believe a system is more efficient than it is in reality.
GAO—Government Accountability Office (General Accounting Office) (US) (government) GATT—General Agreement on Tariffs and Trade (government) GDP—gross domestic product (economics) GEF—Global Environmental Facility (environment) Genco—Any company doing electricity generation (US) (electricity) GFN—Global Footprint Network
Cost of goods sold (COGS) (also cost of products sold (COPS), or cost of sales [1]) is the carrying value of goods sold during a particular period. Costs are associated with particular goods using one of the several formulas, including specific identification, first-in first-out (FIFO), or average cost.
The accounting equation plays a significant role as the foundation of the double-entry bookkeeping system. The primary aim of the double-entry system is to keep track of debits and credits and ensure that the sum of these always matches up to the company assets, a calculation carried out by the accounting equation.