";s:4:"text";s:4720:"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. This means the average temperature is 9*c so we lookup the water properties at this temperature to find the density of 999.78kg/m3 and a specific heat capacity of 4.19kJ/kg/K. Divide the heat pump's output, in British Thermal Units (BTUs), by 2,930. c = q NRE (5) where . 1 Refrigeration Ton (RT) = 1 TONScond = 12000 Btu /h = 200 Btu /min = 3025.9 k Calories /h = 12661 kJ/h = 3.517 kW. Total calculated refrigeration load (sum of Items 1 to 7) = 23411 kcal/h Total refrigeration requirement with allowances 23411 × 24 ÷ 18 = 31215 kcal/h. Size: Room Ceiling Height: Number of People Inside Regularly: Type: Insulation Condition: Sun Exposure: Climate: General Purpose AC or Heating BTU Calculator. Cooling capacity needed.- Get the cooling capacity needed value by setting a security margin and an operation time per day values. 1 ton of refrigeration is equivalent to 211 kJ/min or 200 Btu/min. Estimated Cooling Capacity needed = C1 + C2 (BTU/hr) Air Conditioning Calculations - Other Factors. The higher its capacity, the more heat it transfers when it moves at a set rate. The capacity of the compressor is very important parameter, since the capacity of whole refrigeration or the air conditioning plant depends on it. A ton is the amount of heat removed by an air conditioning system that would melt 1 ton (2000 lbs.) c = capacity (Btu/min) q = refrigerant circulated (lb/min) NRE = Net Refrigeration Effect (Btu/lb) Compressor Displacement. The heat required to melt 1 lb of ice at 32 oF to water is 144 Btu. Refrigerant weight to volume ratio changes based on temperature, ... recovery tank has a water capacity of 26.2 lbs. of ice in 24 hours. The capacity of the reciprocating compressor depends on the diameter of the cylinder bore, the length of the piston stroke inside the cylinder, number of cylinders in the compressor and the speed of rotation of the crankshaft. Add C1 and C2 together and you will get a very simplified cooling capacity needed for the room. 1 ton refrigeration = 12,000 Btu/h = 200 Btu/min 1 watt = 3.412 Btu/h 1 horsepower = 2545 Btu/h 1 lb = 7000 grains 1 ft (head) = 0.433 psi 1 square foot EDR (equivalent direct radiation) = 240 Btu 1 boiler horsepower = 33,479 Btu/h No. Other factors that your contractor will consider to determine the sizing of the cooling capacity include the direction of your room. 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. The basic SI units equation for deriving cooling capacity is of the form: ˙ = ˙ Where ˙ is the cooling capacity [kW] ˙ is the mass rate [kg/s] d = c v / NRE (6) where . It is defined as the rate of heat transfer that results in the freezing (*or melting) of 1 short ton (2,000 lb; 907 kg) of pure ice at 0 °C (32 °F) in 24 hours. Capacity. Divide this weight by the number of cycles the system will go through during the time period.