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Topic: Coefficient of performance

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	Heat Pump
		Heat Pumps are usually characterized by a coefficient of performance which is the number of units of energy delivered to the hot reservoir per unit work input.
		The coefficient of performance (CP) for a heat pump is the ratio of the energy transferred for heating to the input electric energy used in the process.
		Therefore, the coefficient of performance of a refrigerator is expressed as
	hyperphysics.phy-astr.gsu.edu /hbase/thermo/heatpump.html (530 words)

	Increase SQL Server's Performance with Speed Coefficient 2.2
		This scan analysis performs a deep examination of all table scans, clustered index scans, and index scan operations and displays the summary results by table.
		Coefficient has the ability to monitor the performance of a remote database server.
		Coefficient 2.2.0 can be divided into main three categories with respect to its functionalities, which include Trace, Analysis, and Templates.
	www.sql-server-performance.com /software/review/speed_coefficient_p1.aspx (773 words)

	Coefficient of Performance (COP)
		The coefficient of performance as a refrigerator is defined as:
		The COP depends primarily on the temperatures of the evaporator and the condenser, the closer the two temperatures are, the higher the COP.
		COP also depends on the refrigerant gas and the model of compressor used.
	www.aie.org.au /melb/material/resource/cop.htm (0 words)

	Heat Engines
		COP as the ratio of the amount of heat removed at the lower temperature to the work put into the system (i.e.
		, and the coefficient of performance is smaller.
		Note: The coefficient of performance for a refrigerator/air conditioner and the coefficient of performance of a heat pump are defined differently.
	electron9.phys.utk.edu /phys136d/modules/m3/heatpump.htm (1589 words)

	tScholars.com \| Coefficient of performance (Site not responding. Last check: )
		The coefficient of performance, or COP (sometimes CP), of a heat pump is the ratio of the output heat to the supplied work or
		A geothermal heat pump operating at COP 3.5 is able to move 3.5 kwh (11,946 BTUh) of heat for every 1 kwh it consumes.
		(The COP of an air source heat pump may be 2.0 (200% efficiency) at low outdoor air temperatures before its backup electric resistance heating coils are turned on.) {{{author}}}, {{{title}}}, [[{{{publisher}}}]], [[{{{date}}}]].
	www.tscholars.com /encyclopedia/Coefficient_of_performance (258 words)

	Coefficient Of Performance (Site not responding. Last check: )
		The drag coefficient is a number that aerodynamicists use to model all of the complex dependencies of...
		The drag coefficient (C d or C x) is a number that describes a characteristic amount of aerodynamic drag...
		Coefficient of performance (COP) In the refrigerator or heat pump, a refrigerant, typically ammonia or freon, is pumped around a loop.
	airconditioningtheory.quartconditioning.com /coefficientofperformance (703 words)

	Research Institute for Vacuumenergy - Free Energy (Site not responding. Last check: )
		It is the general opinion, that it is not possible to realize an electromagnetic system, which has a coefficient of performance of more than 100%.
		We have included the additional aspect of efficiency besides the coefficient of performance to make more clear the role of voltage, current and the energy from the vacuum in an EM system.
		The coefficient of performance, as we interpret it, explains the difference of the input energy induced by the operator and of the total energy obtained (output).
	www.vakuumenergie.de /cop.html (2351 words)

	Frequently Asked Questions (FAQs) KeyWords:(Thermoelectric Cooler TEC Peltier)
		The coefficient of performance (COP) is defined as the amount of heat pumping one gets for each unit of electrical power supplied.
		The coefficient of performance (COP) is the amount of heat pumping divided by the amount of supplied electrical power.
		Typically, the coefficient of performance, heat pumped then divided by input power, is between 0.4 and 0.7 for single stage applications.
	www.marlow.com /TechnicalInfo/frequently_asked_questions_faqs.htm (1446 words)

	US West Energy Solutions Blog: Heat Pumps and Coefficient of Performance (COP)
		This efficiency is rated as the COP or the coefficient of performance.
		The COP of heat pumps seems to compare very favorably with high-efficiency gas-burning furnaces (90-99% efficient), and electric heating (100%), but the full costs of the energy consumed must be considered, and energy from gas has traditionally been much less expensive than that from electricity.
		Performance for the Hallowell ACHP03641 is 36,000 Btu / hr delivered heating capacity with a 2.4 HCOP when the outdoor temperature drops to -10ºf.
	blog.uswesco.com /2007/03/heat-pumps-and-coefficient-of.html (635 words)

	AquaCal: Heat Pump Performance Defined (COP) (Site not responding. Last check: )
		The heat emitted by a heat pump is notionally the sum of the heat extracted from the heat source (air, water, solar, ground) and the energy needed to drive the phase.
		The performance of an electric compression heat pump at a set temperature condition is referred to as the coefficient of performance (COP).
		The COP of an ideal heat pump is determined solely by the condensation temperature and the temperature lift (condensation - evaporation temperature).
	www.aquacal.com /heat-pump-information/performance/cop.html (207 words)

	Innovation: Dam Stability - Assessing the Performance of a GPS Monitoring System - GPS World
		The linear coefficient for LREF-ML35 and the plumb-line data is 0.87.
		The linear coefficient for RREF-ML35 and the plumb-line data is 0.91.
		The higher linear coefficient of 0.95 between the two GPS solutions suggests that the two systems are measuring slightly different signals.
	www.gpsworld.com /gpsworld/article/articleDetail.jsp?id=374824&sk=&date=&pageID=4 (574 words)

	coefficient of performance (COP)
		COP is used as a measure of the steady state performance or energy efficiency of heating, cooling, and refrigeration appliances.
		It is equal to the energy efficiency ratio (EER) divided by 3.412.
		The higher the COP, the more efficient the device.
	www.daviddarling.info /encyclopedia/C/AE_coefficient_of_performance.html (137 words)

	1998 Building Publications - Potential Coefficient of Performance Improvements Due to Glide Matching With R-470C.
		Potential improvements of the Coefficient of Performance (COP) were investigated for R-407C at cooling and heating conditions of a residential heat pump.
		The COP benefit of using counter-flow heat exchangers in a low-life air-conditioning application was found to be 7.1% when compared to a system with a cross-flow evaporator and condenser.
		The COP penalty caused by glide mismatch (parallel flow) is approximately twice as severe as the benefit that can be realized from glide matching.
	www.fire.nist.gov /bfrlpubs/build98/art064.html (0 words)

	ch.5 definitions
		coefficient of performance of a heat pump - Coefficient of performance of a heat pump is the measure of performance of a heat pump and is defined as the fraction of the desired output over the required input of the heat pump.
		coefficient of performance of a refrigerator - Coefficient of performance of a refrigerator is the efficiency of a refrigerator and is defined as the fraction of the desired output over the required input of the refrigerator.
		Energy Efficiency Rating - Energy efficiency rating is the performance of refrigerators and air conditioners in the U.S., denoted by EER, which is the ampunt of heat removed from the cooled space in Btu's for 1 Wh (watt-hour) of electricity consumed.
	www.ocf.berkeley.edu /~ssoong/me105/definitions/me105_5.html (985 words)

	Forum Question: How many watts to cool my equipment?
		In air conditioning systems, we talk about coefficient of performance instead of efficiency, because and air conditioner can remove more heat than the electrical power consumption.
		Coefficient of performance depends on the inside and outside temperature and the design of the equipment.
		For a small domestic unit, the coefficient of performance is about 2 - so an air conditioner will use 500W of electricity to remove 1000W of heat.
	www.efunda.com /forum/show_message.cfm?start=1&thread=15400&id=15403 (96 words)

	Title 24 Energy Consulting
		The coefficient of performance for cooling is the ratio of the rate of net heat removal to the rate of total energy input, calculated under designated operating conditions and expressed in consistent units.
		The coefficient of performance for heating is the ratio of the rate of net heat output to the rate of total energy input, calculated under designated operating conditions and expressed in consistent units.
		Solar heat gain coefficient (SHGC) is the “ratio of the solar heat gain entering the space through the fenestration area to the incident solar radiation.
	www.title24express.com /glossary.htm (3675 words)

	High performance materials - Performance Plastics, Ltd.
		This is a summary of the properties of the most popular high performance plastics.
		These materials perform well at much higher temperatures than most, are stronger, have important characteristics such as chemical resistance, and some are fire retardant.
		It has excellent thermal stability, offers outstanding mechanical performance at high temperatures and is resistant to a wide range of chemicals and superheated water.
	www.performanceplastics.com /highperformance/highperformance.shtml (336 words)

	Hawk Performance: HPS - High Performance Street Brake Pads
		Increasing the performance of your vehicles braking system is easy when you choose Hawk Performance’s HPS braking compound.
		All Hawk Performance High Performance Street brake pads provide a limited lifetime warranty, ensuring products to be free of defects from manufacturer’s workmanship and materials.
		Hawk Performance burnishes its High Performance Street brake pads as a final step in the factory, but all brake pads have to be bedded-in with the rotors (new or used) that they will be used against.
	www.hawkperformance.com /performance/hps.php (207 words)

	Title 24 :: Title 24 Consultants :: NRG Compliance,Inc :: Energy Compliance Services
		The coefficient of performance for cooling is "...the ratio of the rate of net heat removal to the rate of total energy input, calculated under designated operating conditions and expressed in consistent units, as determined using the applicable test method in the Appliance Efficiency Regulations or § 112."
		The Heating Seasonal Performance Factor (HSPF) is "the total heating output of a heat pump (in British thermal units) during its normal usage period for heating divided by the total electrical energy input (in watt-hours) during the same period, as determined using the applicable test method in the Appliance Efficiency Regulations."
		A dwelling unit that is separated only by a property line and double wall construction (with a space between the walls) from another dwelling unit and that shares no common floor/ceiling is also treated as single family.
	www.nrgcompliance.com /title-24-glossary.htm (0 words)

	Method for determining optimal coefficient of performance in a transcritical vapor compression system patent invention
		The coefficient performance equals the total useful heat transferred by the vapor compression system 20 divided by the work put into the vapor compression system 20 by system components, such as fans.
		The high side pressure influences the coefficient of performance, and it is therefore important to regulate the high side pressure to optimize the coefficient of performance of the vapor compression system 20.
		In the illustrated example, the coefficient of performance varies between approximately 2.7 and 3.1 and reaches a maximum of approximately 3.1 at a high side pressure of approximately 1,350 psia.
	www.freshpatents.com /Method-for-determining-optimal-coefficient-of-performance-in-a-transcritical-vapor-compression-system-dt20061019ptan20060230773.php (1744 words)

	Adsorption Air-Conditioning for Containerships and Vehicles
		The system coefficient of performance for both mechanical and adsorption type compressor operations were 1.99 and 0.68 respectively.
		Based on these measurements, the cycle coefficient of performance was determined.
		The cycle coefficient of performance was determined and compared to conventional systems.
	www.metrans.org /research/final/99-19_Final.htm (3495 words)

	Drag Coefficient
		The greater the wasted motion, the greater the average hand force that is necessary to swim at the same velocity, and the less effective the technique.
		It was hypothesized that faster swimmers would have a lower drag coefficient than slower swimmers and that older swimmers would have a lower drag coefficient than younger swimmers.
		The coefficient of active drag was found to be a valid measure for the effectiveness of swimming technique.
	swimmingtechnology.com /IOC2003.htm (417 words)

	Hawk Performance Brake Pads
		Hawk Performance is also the Original Equipment recommended performance brake pad upgrade for General Motors Corvettes and is an accessory performance brake pad supplier for Mazda, Nissan and Hyundai.
		Hawk Performance's revolutionary friction materials can operate from temperatures of -30° Fahrenheit below zero to 1400° Fahrenheit above zero and offer a coefficient of friction ranging from 0.20µ to 0.68µ depending on the material selected and the application it is required to work in.
		Hawk Performance's recognition as an ISO 9001 manufacturer is proof that that they are committed to developing the safest, most durable brake products available.
	www.import-racer.com /hawk (476 words)

	The page cannot be found (Site not responding. Last check: )
		HTTP Error 404 - File or directory not found.
		Go to Microsoft Product Support Services and perform a title search for the words HTTP and 404.
		Open IIS Help, which is accessible in IIS Manager (inetmgr), and search for topics titled Web Site Setup, Common Administrative Tasks, and About Custom Error Messages.
	www.heatpumps.co.uk /gloss.htm (0 words)

	Amazon.com: "Context Coefficient": Key Phrase page (Site not responding. Last check: )
		See all pages with references to "Context Coefficient".
		Coefficient [Impact] Context Coefficient model [Impact] Attitude Coefficient model [Impact] Performance...
		The Institutional Context of Population Change: Patterns of Fertility and Mortality across High-Income Nations (Population and Development Series) by Fred C. Pampel
	www.amazon.com /phrase/Context-Coefficient (272 words)

	2000 Building Publications - Impact of Elevated Ambient Temperatures on Capacity and Energy Input to a Vapor ... (Site not responding. Last check: )
		For refrigerants operating in the vapor compression cycle, the COP degradation is greater than that for the Carnot cycle and varies among fluids.
		The two most influential fundamental thermodynamic properties affecting refrigerant performance in the vapor compression cycle are refrigerant's critical temperature and molar heat capacity.
		The difference between COPs is related to different levels of irreversibility because of the superheated vapor horn and the throttling process.
	fire.nist.gov /bfrlpubs/build00/art051.html (347 words)

	EERE Consumer's Guide: Absorption Heat Pumps (Site not responding. Last check: )
		The efficiency of air-source absorption coolers and heat pumps is indicated by their coefficient of performance (COP).
		COP is the ratio of either heat removed (for cooling) or heat provided (for heating) in Btu per Btu of energy input.
		Look for a heating efficiency of 1.2 COP or greater and a cooling efficiency of 0.7 COP or greater.
	www.eere.energy.gov /consumer/your_home/space_heating_cooling/index.cfm/mytopic=12680 (448 words)

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