Some chilled water loop arrangements are very complex while others are simple. Chiller capacity (tons) = gpm (chilled water) x ∆t (water)/24 For Air: 1 lb/h = 4.5 Q 1 ton = Q∆h/2670 cfm x static pressure (in. 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 of 4.0 - a COP equivalent to an energy efficiency ratio of 13.65. However, since 60°F water is too cool for a hot water heating system and too warm for a chilled water system, to calculate the correct flow rate, the formula should be based upon more appropriate water temperatures for each type of system, such as the specific heat of the water or the density changes that occur with changing water temperature. That said, we put together the following tables to serve as general guides for estimating a pipe's water flow capacity through a pipe or roof drain. Heating Hot Water - Load, Flow & Temperature Difference Wizard ... & Temperature Difference Online Calculator: Primary-Secondary - Flow & Temperature Online Calculator 1.1 UNITS There are two calculators, (1) one that focuses on United States Customary System Units (USCS) and another on (2) International System of Units (SI). Online calculator to quickly determine Pipe Sizing by Velocity for Water. It is designed for use in hot water, chilled water and cooling/heating applications. If you have questions, please call our Drain Wizard at 800-635-0384. By knowing the density of water, one can determine the mass flow rate based on the volumetric flow … Heat Load and Water Flow. The calculator has a modular construction which means that it can be fitted with optional output modules when it is ordered. Example Calculation of Water Flow Rates for Pipe Sizes and Lengths. The formulas on this page allow one to calculate the temperature rise for a given water cooling application where the power dissipation and flow rate are known. Density of air 6356 x Efficiency Density of standard air Small fans 0.40 – 0.50 efficiency Large fan It then returns to the chiller where the chiller removes the heat from the water using the refrigeration process. However, this guide focuses Includes 53 different calculations. For All Cases, The Surrounding Temperature Can Be Assumed At 30oC. w.g.) Question: For One Chosen Case Of Chilled Water Inlet Temperature From Q4, Determine The Mass Flow Rate (in Kg/s) Of The Refrigerant And Calculate The Coefficient Of Performance For The Chiller System. 4) Correct chiller tonnage for leaving water temp (LWT), if LWT is other than 50°F: Calculations for chiller tonnage in the plastics industry are based on a coolant temperature of 50°F (LWT), with sufficient capacity to handle a 10°F-temperature rise in coolant from the process load. Control of the chilled water from pressure to velocity, to volume, is up to the control system controlling the pumps and valve actuators in the system. The battery powered SITRANS FUE950 is a universal custody transfer approved energy calculator. Equations displayed for easy reference. The table below was prepared using the equation: Q = 0.442 C D2.63 (ΔP/L)0.54, with units as given above, to calculate the water flow rates for PVC pipe with diameters from 1/2 inch to 6 inches and length from 5 ft to 100 ft, all for a pressure difference of 20 psi across the particular length of pipe. Water Flow (GPM/GPH) based on Pipe Size and Inside/Outside Diameters Figure 1: The three systems available in this calculator are the (1) split system, packaged A/C, (2) air cooled chilled water and (3) water cooled chilled water. A water systems heat load in Btu/h can be simplified to: Also Assume The Refrigerant Exits The Condenser As Saturated Liquid.