EER is defined as the net cooling capacity (in Btuh) divided by the total electrical power input (in watts), as shown in EQ – 1. Both tons are actually defined in the same way. BTU/hr. Metric units: The water flow rate of chilled water into the evaporator is 0.0995m3/s, the inlet temperature is 12*c and the outlet temperature is 6*c. 6.28 Cooling Load Calculation Procedure 64 6.29 Cooling Load Peak Time Estimate 66 PART 7. According to the standard calculation, it takes 288,000 Btu to melt a ton of ice in 24 hours, or 12,000 Btu per hour. AC Unit Size Calculator accurately estimates the size of the central air conditioner unit you should install in your house. Convert tons to BTUs per hour by multiplying it by 12,000. The first day the HVAC System is turned on? We’ll first look at how to calculate in metric units and then imperial. of the HVAC system – First piece of information needed – 12,000 Btu/h = 1 Ton Cooling • Can be. The metric calculation would be: 2,500kW / 460kW = 5.4 so the COP is 5.4. Substituting, h = 500 X 40 gpm X 24 deg-F = 480,000 Btu/hr. The unit's value is approximately 11,958 Btu/h (~3.504 kW/h) , redefined to be exactly: =X CFM X ∆T.24 X.075 X 60 X CFM X ∆T = 1.08 X CFM X ∆T Equipment” enter the total kW for cooling from the Equipment Costs Page as the kW for the Server/Computer Equipment, and set the load time for 75% and the runtime at 100%. Flow : 100LPM = 6000 LPH Outlet Temp from Chiller: 9O Centigrade Inlet Temp to chiller: 30O Centigrade Total Kcal = Flow x specific heat x Weight x diff in temp, = 6000 1 1 21 ÷ 12,000 Oversize the chiller by 20% Ideal Size in Tons = Tons x 1.2 12,000 = 19.992 Tons, Oversize the chiller = 19.992 x 1.2 = 23.9904. The system is pre-set to a 72-degree indoor temperature and a 95 If we convert the cooling capacity to watts (1 ton = 12000 BTU = 3517 watts) and then divide it by the power consumed to achieve this we get the EER, the higher the better (this shouldn’t ever be below 2.3 and should be around 3.5 for a 5-star rating). Here, you will find our HVAC formulas. and cooling loads of the house. On smaller screens such as phones you must download the PDF to view the formulas. size. What Is the Load? zËl}2Ïlr ›Em›úë…ø0æòç÷?œ^ßO¿lúTñLgExÿçÑ[Bɝ„ùà€fL5Ò"W¢Øld”˜‡«Vïâi#¦þd¬ñ+³ãþÎÉäт'.™-ˆlГI+ ãŒD²+ûÓQÕýlYí´B_Å!¡ò—{ ^»ŸžŠWq•S9Y. Air Conditioning - Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort; Related Documents . This HVAC calculator is the closest estimate to the actual Manual J calculation done by HVAC pros. An easy-to-use HVAC tool for calculating necessary thermal output capacity (in BTUs) This tool is based on the square foot method, with computations added for the most important values included, such as insulation, windows, and other contributing factors. Our free, easy-to-use HVAC load calculator will help you determine the necessary thermal output capacity (in BTUs) of any residential building. Jump to Page . X CFM X ∆ H = 0.75 x 60 x CFM x ∆ H = 4.5 x CFM x ∆ H RELATIVE HUMIDITY= __Moisture present___ Moisture air can hold SPECIFIC HUMIDITY = grains of … EER is calculated at a single very specific operating point and is typically only applied for commercial equipment > 6 nominal tons. Cooling capacity of a chiller, what we need to know. Calculate the chiller capacity in tons of refrigeration. The day the building load calculation was begun? On larger screens you can either scroll down to view each individually or download the PDF. Use this calculator to estimate the cooling needs of a typical room or house, such as finding out the power of a window air conditioner needed for an apartment room or the central air conditioner for an entire house. This means that for every 1kW of electricity you put into the machine, you will produce 5.4kW of cooling. 2. The heat load estimate is based on your climate region, total square footage, number of rooms or zones you want, ceiling height, insulation type, number of windows and doors. BTU Calculator AC BTU Calculator. Solution ID: case4397 Last 07/12/2006 Modified: Question or Calculate chiller capacity (tons) for process cooling load Problem: Question or How do I calculate chiller capacity for a process cooling load? Take for example a chiller which is producing 2,500kW of cooling or 8,533,364BTU/h in metric units. The formula for total heat removed in a chiller installation is h = 500 X q X dt where h = total heat removed in Btu/hr, q is the chilled water flow rate in gpm, and dt is the chilled water's total temperature differential. OPTION 2: Enter tonnage of the unit into the program. Cooling may be required for facility heating, ventilation, and air conditioning (HVAC) systems or for process cooling loads (e.g., data centers, manufacturing process cooling). ÷ 12,000 Oversize the chiller by 20% Ideal Size in Tons = Tons … The British ton is the long ton, which is 2240 pounds, and the U.S. ton is the short ton which is 2000 pounds. – Specific Heat X Specific Density X 60 min./hr. 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 … Right-sizing the HVAC system begins with an accurate understanding of the heating and cooling loads on a space; however, a full HVAC design involves more than just the load estimate calculation—the load calculation is the first step of the iterative HVAC design procedure. AC calculator uses your house size (square feet), climate zone, efficiency and equipment type (standard central air vs central heat pump) to show you exactly what size central air unit you need. This HVAC Load Calculator quickly estimates the size of your heating and cooling system in BTU's. You are on page 1 of 59. 1 degree) SENSIBLE HEAT FORMULA (Furnaces): BTU/hr. 1 ton is equal to 20 hundredweight. 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