Calculating chiller and cooling tower refrigeration - in tons Cooling towers tons pairs the water-cooled chiller tons and the water-cooled condenser tons.  Chiller Refrigeration Tons The process of cooling is called refrigeration. Refrigeration or cooling capacity can be measured in tons. A water-chiller refrigeration ton is defined as: 1 Refrigeration Ton (RT) = 1 TONScond = 12000 Btu/h = 200 Btu/min = 3025.9 k Calories/h = 12661 kJ/h = 3.517 kW 1 kW = 0.2843 Refrigeration Ton (RT) A ton is the amount of heat removed by an air conditioning system that would melt 1 ton (2000 lbs.) of ice in 24 hours. The heat required to melt 1 lb of ice at 32 oF to water is 144 Btu. 1 Ton Refrigeration = (2000 lb) (144 Btu/lb) / (24 hr)     = 12000 Btu/hr Converting between Btu/h and Tons of Refrigeration Btu/h Refrigeration Ton 6000 1/2 12000 1 18000 1 1/2 24000 2 30000 2 1/2 36000 3 42000 3 1/2 48000 4 54000 4 1/2 60000 5 Cooling Tower Tons A cooling tower ton is defined as: 1 cooling tower ton = 1 TONSevap = 1 TONScond x 1.25 = 15000 Btu/h = 3782 k Calories/h = 15826 kJ/h The equivalent ton on the cooling tower side actually rejects about 15000 Btu/h due to the heat-equivalent of the energy needed to drive the chiller's compressor.

This equivalent ton is defined as the heat rejection in cooling 3 U.S. gallons/minute (1500 pound/hour) of water 10°F, which amounts to 15000 Btu/hour, or a chiller coefficient-of-performance (COP) of 4.0 - a COP equivalent to an energy efficiency ratio (EER) of 13.65. Heat Load and Water Flow A water systems heat load in Btu/h can be simplified to: h = cp ρ q dt     = (1 Btu/lbm oF) (8.33 lbm/US gal) q (60 min/h) dt     = 500 q dt         (1) where h = heat load (Btu/h) cp = specific heat, 1 (Btu/lbm oF) for water ρ = 8.33 (lbm/US gal) for water q = water volume flow rate (US gal/min) dt = temperature difference (oF) Example - Water Chiller Cooling Water flows with 1 gal/min and 10oF temperature difference. The ton of cooling load can be calculated as: Cooling load = 500 (1 US gal/min) (10 oF) / 12000     = ton Converting between heat and energy units Converting kW/tonn to COP or EER en: cooling load tonses: enfriamiento de toneladas de cargade: Kühllast Tonnen

Have you ever wondered why some power ratings are expressed in WATTS, some in AMPERES or AMPS, some in VOLTS, and some in KVA? This page will explain in simple terms the difference between the power ratings and describe when each should be used in your data center and network architecture planning. A KVA is simply 1,000 volt amps. A volt is electrical pressure. An amp is electrical current. A term called apparent power (the absolute value of complex power, S) is equal to the product of the volts and amps. On the other hand, a watt (W) is a measurement of real power. Real power is the amount of actual power that can be drawn from a circuit. When the voltage and current of a circuit coincide, the real power is equal to the apparent power. However, as waves of current and voltage coincide less, less real power is transferred, even though the circuit is still carrying current. Differences between real and apparent power, and thus watts and volt amps, arise because of inefficiencies in electrical transmission.

The resulting inefficiency of electrical transmission can be measured and expressed as a ratio called the power factor. The power factor is a ratio (a number from 0 to 1) of real power and apparent power. In the case of a 1.0 power factor, the real power equals the apparent power. In the case of a 0.5 power factor, real power is approximately half that of the apparent power. Deploying systems that have higher power factors result in less electrical loss and can help improve your Power Usage Effectiveness (PUE). how to clean air handling unitMost Universal Power Supply (UPS) units will list the average power factor and real-time load capacity of the UPS, in addition to the KVA.cost of 1 ton ac unit Example: You own a 500 KVA UPS unit (apparent power) with a 0.9 power factor.  ac window unit target

The resulting real power is 450 kilowatts. Some Useful Conversion Factors and Formulas Joule per second (J/s) British thermal unit per hour British thermal unit per second (BTU/s) British thermal unit per second In physics, power (symbol: P) is the rate at which work is performed. In the SI system of measurement, power is measured in watts (symbol: W). This can be modeled as an energy flow, equivalent to the rate of change of the energy in a system, or the time rate of doing work. Create Account or Login Use the SEARCH box to locate your part (no: dashes, commas, slashes, ect). You may search for your part by keyword or model number. If you are unable to locate a part or item, use our CHAT, or CONTACT form! YALEHOIST CATALOGS & MANUALS Army Type Hand Chain Hoist BEW Wire Rope Hoist CEW Wire Rope Hoist DEW Wire Rope Hoist EEW Wire Rope Hoist EW Electric Wire Rope Hoist FEW Wire Rope Hoist Global King 1-3 Ton

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