Radiant Cooling

Using advance computing methodologies and energy simulations to design unique features in the HVAC system, dbHMS Consultants have enabled IRRAD to achieve 35 - 40% less operating cost

The Institute of Rural Research And Development (IRRAD) office building is a sustainable building designed to meet the extremes of the composite climate. Noida-based dbHMS, Green Building Consultants, that has a strong base in building engineering fundamentals, used advance computing methodologies and extensive energy simulations to design the building's HVAC system, India's first Radiant cooling project. A radiant cooling system refers to a temperature-controlled surface that cools indoor temperature by removing sensible heat and where more than half of heat transfer occurs through thermal radiation.

Radiant Cooling

After comparing various HVAC systems through simulation studies, an innovative Radiant Cooling was used as a primary cooling mode for the project. The unique features of the HVAC system have enabled this project to achieve 35 -.40% less operating cost. dbHMS used the following strategies for the designing and implementation:

Use of energy simulation in HVAC design
Extensive energy simulations were performed to select the appropriate cooling system and accurately size the HVAC system, and to accurately factor in occupancy, weather variations, diversity factors and then compare it with various other options. Energy simulations and HVAC design was done using advance computing methodologies.

Integration of Phase I & II
The HVAC design integrates previously completed Phase I with new design of Phase II. This allows an effective use of diversity in design and subsequent optimization of equipment sizing.

Project: IRRAD Office
Client: Sehgal Foundation
Size: 35,000 sqft
Scope: HVAC Design
HVAC Design: dbHMS, Noida
Status: Completed 2012
Green Rating: LEED Platinum

IRRAD Office

Radiant cooling
Major part of heat exchange from a human body happens through radiation. Hence, any cooling strategy which cools using radiation is the most efficient option for cooling the space. Radiant cooling has been used as a primarily cooling mode for the project.

Chilled water pipes inside slab
Flexible pipes are embedded in the slab which carries chilled water through the slab. All the cold is stored in the slab, which eventually exchanges the cold with the occupants.

Air supply at occupied zone
Air supply for the latent cooling is delivered at floor height. Supply of cool air at the lower level return air at higher level allows most efficient way of air circulation.

VAV boxes & VFD
The office has been divided into different thermal zones. Each zone has an individual VAV box, thereby allowing increasing or decreasing the air flow as per occupancy and load. VFD in the AHU reduces the fan speed accordingly, thus reducing the operational electricity consumption.

Night cooling
Use of radiant cooling inside slab allows chiller to operate at night and store all the cold inside the building structure. This reduces the chiller operation during day. As ambient temperatures are low at night time, higher efficiency is achieved at chiller energy consumption.

High efficiency chiller
High Efficiency Semi Hermetic Rotary Screw chiller is used for the project. The chiller has non CFC R-134 refrigerant which is environment-friendly. The high efficiency chiller helps in reducing operation cost for the project.

Investment & Payback
Though relatively higher priced, radiant cooling systems give value for money over the long-term by way of significant energy cost savings. The additional investment made on the IRAAD building to make it more energy efficient was around Rs.150/sqft in 2012 when the pipes were not available in India and had to be imported. But with pipes available in India now, the cost is set to reduce further. Payback is the time taken to recover the additional investment made in the building to make it more energy-efficient. For IRAAD, the payback was 1.5 years.

Advantages of Radiant Cooling
As we all know that heat transfer happens through Conduction, Convection and Radiation. Radiation contributes to more than 67% of heat transfer from a human body. Radiant Cooling or Heating is the most efficient way of heat exchange as it requires no medium. The same advantage is used in radiantly cooled buildings. Surface temperature of wall and roof is reduced. Human body then exchanges heat with that low temperature surface radiantly without requirement of circulating large amounts of air. This reduces energy consumption.

Radiant cooling offers advantages such as lower carbon emission, smaller chiller size, smaller AHU, smaller fans, chillers can run at night when their performance is higher, chilled water supply from chiller is typically at 15 deg C compared to 7 deg C for conventional HVAC, lower operating cost by 30-40%, and equal cooling in area with no hot spots.
Click Here
To Know More / Contact The Manufacturer
Please provide your details we will contact you as soon as possible
Please let us know your name.
Please let us know your Designation.
Invalid Input
Please let us know your email address.
Please let us know your City.
Please let us know your Contact Number.
Please brief your query.
Our other value-added services:

To receive updates through e-mail on Products, New Technologies & Equipment, please select the Product Category(s) you are interested in and click 'Submit'. This will help you save time plus you will get the best price quotations from many manufacturers, which you can then evaluate and negotiate.

Equipment & Machinery
Invalid Input
Building Products
Invalid Input

SE Controls: Building on 40 Years of Expertise in Smoke Ventilation & Control

SE Controls is a leading global specialist in manufacture, design, and delivery of intelligent smoke and environmental ventilation systems, and smoke control, using façade automation as an integral part of the building envelope. SE Controls began operations in India Read More ...

A Natural Biophilic Element

greenscreen®’s newest product design for 2022 is the award-winning gsTree which creates shade, provides privacy, and adds the natural biophilic element to any project. The freestanding gsTree rises up from the ground to wrap a supporting column, directing plant Read More ...

How technology is enabling a faster return to offices

The modern office has for long been unimaginable without all things tech. Now, technology is also governing how our new offices take shape - from the four blank walls to a living, thriving workspace complete with focus and wellness areas, and collaboration zones Read More ...

On-The-Go Cloud-Based Fenestration ERP Software

EvA has come up with a new cloud solution – the EvA CLOUD - which can be accessed through the user’s mobile, tablet, and laptop, anytime and from anywhere. The new, easy to use application can also be used by dealers and sales executives for generating quotations on site Read More ...

Lutron Wall Controls for Luxury Homes

Ripu Daman Sharma, Sr. Country Manager - India Subcontinent, Lutron Electronics, elaborates on the trends and technology in home automation, and the products offered by the company. One of the mega trends is the Internet of things (IoT). When it comes to home Read More ...

How Technology Changed Civil Engineering For The Better

The rapid pace of technological advancement is changing every single aspect of our lives — and all of the industries and sectors in which we work. Consequently, civil engineering is not an exception here. For instance, there are plenty of ways in which technology Read More ...

Best smart security cameras to safeguard your home

When picking a CCTV camera for our homes, it is very important that we check all the specifications in detail. Owing to the developments over the year that went by, there has been a spurt in the smart device segment and the security and surveillance segment is one where there's hardly any buyer for devices that are non-smart Read More ...

Air to Water Generation is a Reality

Air-to-Water Generation (AWG) technology is real; in fact, we have devoted our lives and work - separating moisture and drinking water from air – and are set to enter Indian markets – both consumer and institutional – in partnership with a Kolkata-based business house, say Partha Chakraborty & Art Neumann, Founders of Infinite Water, Inc. (IW), an Air to Water Generation technology company based in the USA, as they share their journey in the making of AWG technology. Read More ...

Designing ‘Ready-to-Approve’ Building Plans Online

As the government is aggressively pushing Smart Governance and Digital India, most of the urban local bodies (ULBs) have adopted the online building plan approval system, says Vijay Gupta, Chairman & CEO SoftTech Engineers Limited Read More ...

Offsite Construction

From quality assurance to faster completion, Offsite Construction Technology can be a gamechanger in the post-Covid world, avers Nejeeb Khan, Country Head, Katerra, India. India has set an ambitious target of providing housing facilities to all by 2022 Read More ...

Architecture in the Age of Augmented Reality

How Virtual Reality (AR) and Augmented Reality (AR) will shape the future of built environments. To those outside of the industry, the idea of taking a virtual tour of a new building before it’s even been constructed, every detail brought to life by wearing VR goggles Read More ...

Prioritising Sustainability & Digital Transformation

It is important to start now and design buildings that are equipped with safe, smart and sustainable building technologies for the future, says Raj Manek, Executive Director & Board Member, Messe Frankfurt Asia Holdings Read More ...

Inter-tech: Making India Safe

Earthing is a science and needs to be designed for a location, depending on the soil resistivity value of the location; it is advised to design the Earthing solutions at the very beginning of the project by placing the earth electrodes in the basement, says Charanjeet Singh Read More ...

Smart Poles Bring Smart Solutions

iRAM Technologies’ Smart Pole is a specially designed high strength pole of 9-25 meters height with a camouflage cage to conceal the telecom, IT and IoT components, and an underground chamber for various control devices, gateways, UPS, etc. The camouflage cage or nacelle Read More ...

K- Lite’s Intelligent Poles

The concept of smart cities came into being as a consequential development to internet of things (IoT), digital connectivity, global warming, and the compelling necessities for energy saving. More than 50% of the world’s population lives in cities. A city environment Read More ...

Prefabricated Modular Construction: A rising trend

Prefabricated and modular construction is the production of components in factories that are then transported to the final location and assembled onsite. It is also instrumental in reducing electricity consumption in the factory in Read More ...