Radiant Cooling System

Radiant Cooling System
Radiant Cooling System

Heat Transfer Mechanism

Combination Of Radiation And Convection

Heat Transfer Medium

Sensible Heat Is Removed By Water & Treated & Cooled Fresh Air Removes Latent Heat.

Equipment Size

As It Removes Sensible Heat Only, And Latent Heat Is Removed By(D.O.A.S) Ventilation Equipment Size Is Reduced, As Cooling Effect Is Radiated Through Floor, Vertical Panels.

Duct Work

Reduced Duct Work By 50-55%.

Maintenance

Lower Maintenance As Less Moving Components.

Operating Cost

Comparatively Lower As Can Work Of Higher Water Temp Of 15 To 18ºc.

Initial Installation Cost

Comparatively Lower.

Concerns

The Limited Experience With Radiant Cooling Creates Concerns About The Quality & Availability Of Professionals For Maintenance & Repair Of The System. Major Facility Mgmt. Teams Do Not Know Much About The Controls And Working Of Its Equipment.

Leakage

Condensation Caused By Humidity & Condensate Leakage Is A Problem, And May Disrupt The WorkFlow. Time Required To Clear The Leakage Is More.  Proper Controls Required To Maintain These Major Players Have Specific Software There Are Chances Of Pipes Being Punctured During The Execution.

Zone Control

Zone Control Is Possible, But Slow Response.

Air Drafts

Improves Thermal Comfort Because Heating And Cooling Are Provided Directly & More Evenly To The Occupants without Causing Drafts.

Applications

Suitable Only For Comfort Cooling.

Comfort Control

Best Control As Both Radiant & Air Temp Is Controllers.

Time Lag

There Will Be Around 30 Min Time Lag For Achieving Desired Comfort Levels. Hence The System May Be Required To Be Started Earlier As Compared To Conventional systems.

De-Humidification

Requires Special De-Humidifying Equipment, May Need Separate Chiller, For Low Temp & High Temp Water

False Flooring

This System Cannot Work In Case Of False Flooring. It Requires a Conductive Surface.

Openings In Floor Slab

Minimum Floor Cutouts Required For This System From Plant In Basement.

CFM Required

Very Less CFM Required As The Cooling Is Through Floor. Due To This Smaller Size, Ahus Required In Basement.

Internal Space Required

As The Office Is Cooled Through Floor, Only Displacement Diffusers Are Required Above Floor.

Conventional Air Conditioning Systems

Heat Transfer Mechanism

Convection

Heat Transfer Medium

Conditioned Air Removes Sensible As Well As Latent Heat.

Equipment Size

AHU Size Is More. More Air Needs To Be Circulates.

Duct Work

Cooled Air Is Distributed Through Ducts, Hence Ducting Is More

Maintenance

Higher Maintenance As More Moving Components

Operating Cost

Higher As Chilled Water Required At 7ºc

Initial Installation Cost

Comparatively Higher.

Concerns

Ample Expertise Available As Conventional System, Comfort Temp Include Radiant Portion. Which Are Not Addressed.

Leakage

Leakage Even If Occurred Will Be Mostly In-Service Areas, Time Required To Repair These Leakages Is Less; If accessible.

Zone Control

Simple And Effective Zone Control Can Be Provided.

Air Drafts

Drafts Through Air Distribution System Exist But Can Be Minimized With Good Design.

Applications

Can Be Used In Wide Spread Climatic Conditions.

Comfort Control

Air Flow Is From Top Hence Radiant Loads Are Not Directly Addressed.

Time Lag

There Will Be Around 15 Min Time Lag For Achieving Desired Comfort Levels.

De-Humidification

It Is Achieved At Cooling Coils Itself. At Most Of The Times.

False Flooring

False Flooring Can Be Planned.

Openings In Floor Slab

More Number Of Cutouts Required For This System.

CFM Required

High Cfm Requirement. Bigger Size And More Nos. Of Ahu Required In Basement

Internal Space Required

As The Cooling Has To Be Done Through Ducts And Nozzles, There Will Be Ducts Required To Be Cladded On Almost Alternate Columns.

For More Post Related to HVAC

  1. Chiller Energy Conservation Guidelines
  2. Chiller Energy Performance Parameters
  3. HVAC INTERVIEW QUESTIONS FOR PIPING & FITTINGS
  4. HVAC INTERVIEW QUESTIONS FOR AHU
  5. HVAC INTERVIEW QUESTIONS FOR DUCTING

One thought on “Radiant Cooling System Vs Conventional Air Conditioning System”
  1. Its good as your other content : D, thankyou for putting up. “The present is the necessary product of all the past, the necessary cause of all the future.” by Robert Green Ingersoll.

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