How do you calculate chilled water consumption?

Chilled Water Systems

1. Total Heat Removed. The total heat removed by an air condition chilled-water system can be calculated. h = 500 q dt (1) where.
2. Evaporator Flow Rate. The evaporator water flow rate can be calculated. qe = htons 24 / dt (2) where.
3. Condenser Flow Rate. The condenser water flow rate: qc = htons 30 / dt (3)

How do you calculate water consumption?

Deducting the current meter reading from the previous reading will tell you how many units of water you have used since your last meter reading. To determine your dollar amount of water consumption, multiply the units used by your current water rate.

How do you calculate gpm on a chiller?

The GPM formula is GPM = Air side Btu ÷ (measured water Δt x 500).

How do you calculate chilled water volume?

Similarly, for chilled/hot water systems that are cooled/heated by a heat exchanger, the estimated total system volume is determined by multiplying the circulating pump capacity by 3. For example, for a circulating pump capacity of 150 USG/min, the estimated total system volume would be 150 X 3 = 450 USG.

How is chiller capacity calculated?

Divide Q (BTUs per hour) by 12,000 (the number of BTUs in one ton of cooling capacity). This yields the chiller capacity required to handle the process heat load in tons per hour: Example: 240,000/12,000= 20 tons/hr.

What is water consumption per capita?

141 litres per person per day
On a personal level Singapore’s per capita household water consumption was reduced from 165 litres per person per day in 2000 to 141 litres per person per day in 2018. The target is to lower it to 130 litres by 2030.

What is the GPM formula?

The formula to find GPM is 60 divided by the seconds it takes to fill a one gallon container (60 / seconds = GPM). Example: The one gallon container fills in 5 seconds. 60 / 5 = 12 GPM. (60 divided by 5 equals 12 gallons per minute.)

Why is 2.4 gpm a ton?

RE: Chilled Water GPM per Ton The 2.4gpm evaporator flowrate and the 3gpm condenser flowrate per ton thumbrules come about due to the increase in heat energy sent to the condenser. The condenser must reject heat from two sources.

How is chiller efficiency calculated?

Calculate the system efficiency by the air conditioning efficiency formula EER = Btu/hr cooling/watts consumed. Substituting actual values, 480,000 Btu/hr/24.8 kW/hr = 480,000 Btu/hr/24,800 watts/hr = 19.35.

What is the formula for calculating BTU?

For example, a 300 square foot room typically requires 7,000 BTUs to maintain a comfortable temperature, while a 1,000 square foot room requires 18,000 BTUs. A simple formula to determine your heating needs is: (desired temperature change) x (cubic feet of space) x . 133 = BTUs needed per hour.

How to calculate chiller capacity?

General sizing formula: Calculate Temperature Differential (ΔT°F) ΔT°F = Incoming Water Temperature (°F) – Required Chill Water Temperature Calculate BTU/hr. BTU/hr. = Gallons per hr x 8.33 x ΔT°F Calculate tons of cooling capacity Tons = BTU/hr. ÷ 12,000 Oversize the chiller by 20\% Ideal Size in Tons = Tons x 1.2 You have the ideal size for your needs

How to calculate ton capacity of chillers?

Calculate Temperature Differential (ΔT°F) ΔT°F = Incoming Water Temperature (°F) – Required Chill Water Temperature

What is a water chiller?

Water chiller. In air conditioning, chilled water is often used to cool a building’s air and equipment, especially in situations where many individual rooms must be controlled separately, such as a hotel. A chiller lowers water temperature to between 40° and 45°F before the water is pumped to the location to be cooled.

What is a chiller system?

When a chiller is producing chilled water, the heat that is removed from the chilled water must be rejected somewhere – usually outside of the building. The chiller system is the facilitator of heat transfer between the inside of a building and outside of a building.