Meaning of Delta 50 (75/65/20)
Delta 50° (75/65/20) - with Delta T of 50°C, means 75°C inlet water temperature, 65°C outlet water temperature and 20°C of room temperature. The average water temperature in this example is 70°C (i.e. 75° plus 65°, divided by 2). If we then take the 20°C room temperature we are left with a temperature differential of 50°C or Δt 50°.
Method -
Add the flow water temperature and the return temperature together
Divide the answer by 2
Subtract the room temperature from the answer this gives you the Delta T temperature
Select the closest Delta T valve from the table and multiply the corresponding factor by the output provided for the particular radiator to obtain the output for your calculated Delta T valve.
If we then take into account the reduced inlet temperature eg you will be getting a heat source pump.
If we replace this with inlet water at 4
5°C inlet water temperature, 35°C outlet water temperature and 20°C of room temperature. The average water temperature in this example is 40°C (i.e. 45° plus 35°, divided by 2). If we then take the 20°C room temperature we are left with a temperature differential of 20°C or Δt 20°.
The conversion rate from T50 to T20 is 0.3039.
Eg a radiator 1800 x 500 has 795 Watts at Delta T50 x 0.3039 is 241 Watts (this is the T20 figure).
Meaning of Delta 50 (75/65/20)
Meaning of Delta 50 (75/65/20)
Delta 50° (75/65/20) - with Delta T of 50°C, means 75°C inlet water temperature, 65°C outlet water temperature and 20°C of room temperature. The average water temperature in this example is 70°C (i.e. 75° plus 65°, divided by 2). If we then take the 20°C room temperature we are left with a temperature differential of 50°C or Δt 50°.
Method -
Add the flow water temperature and the return temperature together
Divide the answer by 2
Subtract the room temperature from the answer this gives you the Delta T temperature
Select the closest Delta T valve from the table and multiply the corresponding factor by the output provided for the particular radiator to obtain the output for your calculated Delta T valve.