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bsolute Humidity Enthalpy Relative Humidity Air Density Vapor Pressure Outlet Absolute Humidity Enthalpy Relative Humidity Air Density Vapor Pressure 0.5 kW load Inlet Absolute Humidity Enthalpy Relative Humidity Air Density Vapor Pressure Outlet Absolute Humidity Enthalpy Relative Humidity Air Density Vapor Pressure 1 kW load

bsolute Humidity Enthalpy Relative Humidity Air Density Vapor Pressure Outlet Absolute Humidity Enthalpy Relative Humidity Air Density Vapor Pressure 0.5 kW load Inlet Absolute Humidity Enthalpy Relative Humidity Air Density Vapor Pressure Outlet Absolute Humidity Enthalpy Relative Humidity Air Density Vapor Pressure 1 kW load

Refrigeration and Air Conditioning Technology (MindTap Course List)
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter46: Room Air Conditioners
Section: Chapter Questions
Problem 15RQ
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No load 

Inlet

Absolute Humidity

Enthalpy

Relative Humidity

Air Density

Vapor Pressure
         

Outlet 

Absolute Humidity

Enthalpy

Relative Humidity

Air Density

Vapor Pressure
         

0.5 kW load

Inlet

Absolute Humidity

Enthalpy

Relative Humidity

Air Density

Vapor Pressure
         

Outlet 

Absolute Humidity

Enthalpy

Relative Humidity

Air Density

Vapor Pressure
         

1 kW load

Inlet

Absolute Humidity

Enthalpy

Relative Humidity

Air Density

Vapor Pressure
         

Outlet 

Absolute Humidity

Enthalpy

Relative Humidity

Air Density

Vapor Pressure
         

In regards to a cooling tower practical, I was wondering would someone be able to help me fill out this table using the psychometric chart since I am not exactly sure if I am doing it correctly so it would be please help and also provide a rough idea on how to determine the following parameters for each load case (maybe just the first case of no load so I get a rough idea)

  • Relative humidity of inlet air and outlet air
  • Humidity ratio of inlet and outlet air
  • Enthalpy of inlet and outlet air 
  • Specific volume of inlet and outlet air 

 

Here is additional information if required

Experiment: A cooling tower uses forced air and column packing to cool downward-flowing water. Inlet water temperature and water flow rate are varied to investigate effects on outlet water temperature, outlet air temperature, and outlet air humidity. The system is first observed operating with ambient room temperature water. A heat load is then applied to the water tank, and the system response is observed. This is to simulate a power plant starting up and placing a cooling load on the cooling water supply. The aim is to compare the system response with and without the load. (Data collected from the lab is shown below)

Altitude = around 578 m if needed

Initial room tem = 22 degrees if needed

Parameter Inlet air dry bulb temperature Inlet air wet bulb temperature Outlet air dry bulb temperature Outlet air wet bulb temperature Inlet water temperature Outlet water temperature Air pressure Water flow rate Analysis 1 Air inlet Relative humidity Humidity ratio Specific enthalpy Specific volume Air outlet Relative humidity Humidity ratio Specific enthalpy Specific volume Symbol T₁ T₂ T3 T4 T5 T6 Pa mw 935 Wi hi Vi Φο Wo ho Vo Dimension °C °℃ °C °C °C °C mmH₂O g/s % kg/kg(d.a) kJ/kg m³/kg % kg/kg(d.a) kJ/kg m³/kg No Load 25.2 17.3 19.7 17.7 18.3 18 14.3 48.1 0.5 kW load 1 kW load 26.2 24.7 19.2 18.1 26 22.8 24.3 21.1 29.8 24.7 25.2 21.4 14.1 14.4 46.6 47.7
Transcribed Image Text:Parameter Inlet air dry bulb temperature Inlet air wet bulb temperature Outlet air dry bulb temperature Outlet air wet bulb temperature Inlet water temperature Outlet water temperature Air pressure Water flow rate Analysis 1 Air inlet Relative humidity Humidity ratio Specific enthalpy Specific volume Air outlet Relative humidity Humidity ratio Specific enthalpy Specific volume Symbol T₁ T₂ T3 T4 T5 T6 Pa mw 935 Wi hi Vi Φο Wo ho Vo Dimension °C °℃ °C °C °C °C mmH₂O g/s % kg/kg(d.a) kJ/kg m³/kg % kg/kg(d.a) kJ/kg m³/kg No Load 25.2 17.3 19.7 17.7 18.3 18 14.3 48.1 0.5 kW load 1 kW load 26.2 24.7 19.2 18.1 26 22.8 24.3 21.1 29.8 24.7 25.2 21.4 14.1 14.4 46.6 47.7
The make-up water mass flow rate is shown in the following table: Inlet Outlet Inlet Outlet Inlet Outlet Tower 1 Tower 2 Absolute Humidity Absolute Humidity Absolute Humidity Absolute Humidity Absolute Humidity Absolute Humidity No heat 3x10-4 kg/s 3.78x10-4 kg/s Enthalpy Enthalpy Enthalpy Enthalpy Enthalpy Enthalpy No load Relative Humidity 0.5 kW 3.2x10-4 kg/s Relative Humidity 0.5 kW load Relative Humidity Relative Humidity 1 kW load Relative Humidity Relative Humidity 1 kW 3.69x10-4 kg/s Air Density Air Density Air Density Air Density Air Density Air Density Vapor Pressure Vapor Pressure Vapor Pressure Vapor Pressure Vapor Pressure Vapor Pressure
Transcribed Image Text:The make-up water mass flow rate is shown in the following table: Inlet Outlet Inlet Outlet Inlet Outlet Tower 1 Tower 2 Absolute Humidity Absolute Humidity Absolute Humidity Absolute Humidity Absolute Humidity Absolute Humidity No heat 3x10-4 kg/s 3.78x10-4 kg/s Enthalpy Enthalpy Enthalpy Enthalpy Enthalpy Enthalpy No load Relative Humidity 0.5 kW 3.2x10-4 kg/s Relative Humidity 0.5 kW load Relative Humidity Relative Humidity 1 kW load Relative Humidity Relative Humidity 1 kW 3.69x10-4 kg/s Air Density Air Density Air Density Air Density Air Density Air Density Vapor Pressure Vapor Pressure Vapor Pressure Vapor Pressure Vapor Pressure Vapor Pressure
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