Study on Discomfort Degree Hours of Building Treated with Different Thermal Insulating Materials by Computer Software

B. M. Suman, Principal Technical Officer, CSIR-Central Building Research Institute, Roorkee.

Introduction

The most common application of degree day is the analysis of energy consumption in existing buildings. Since energy demand for space conditioning (heating or cooling) has a linear relationship with temperature difference, which follows that there should be a linear relationship between energy consumed and discomfort degree hours in a year. By using this theoretical1 approach, monthly or annually energy estimate can be calculated for heating and cooling. Degree day provides a simple estimation of annual load of a building for a location based on tabulated discomfort degree hour value. This method2 may be used with accuracy where a building use, HVAC equipment efficiency, indoor temperature and internal gains are relatively constant. The energy analysis method3 is called a bin method and is often used where equipments have efficiency as a function of outdoor air temperature. Amongst two main uses of discomfort degree hours in building, one is to estimate energy consumption4 due to space conditioning for new building and major refurbishment for ongoing energy monitoring and analysis of existing buildings. Degree days are essentially the summation of temperature difference over time and hence they capture both extremity and duration of indoor temperatures. The temperature differences are between a reference temperature or threshold temperature and the indoor air temperature. Cooling or heating discomfort degree hours are calculated from temperatures below or above the threshold winter or threshold summer temperatures respectively. The heating or cooling energy (KWh) demand is equal to the product of overall heat loss or gain coefficient and respective degree hours.

Thermal insulation materials have properties to resist heat flow. Amongst various thermal insulation materials used in buildings, some of them are Expanded Polystyrene (EPS), Neopor, Peripor, Styropor, Elastospray, Elastopor etc. These materials are easier to install as these are lightweight and are available in desired size and thickness. The insulating properties (K, R and U-values) of a thermal insulation material depend upon thickness, density and the constituent materials. The new construction practice requires more cautiousness in design for providing acceptable indoor environment quality otherwise building will not function well under extreme climate conditions and over heating or cooling problem may result. Performance of different insulating materials in buildings are needed to be evaluated quantitatively for their thermal behaviors as if they are applied to actual building for a whole year covering most of the weather condition that the building may face. In this study, a computer simulation method5 has been used to determine building discomfort degree hours. The computer software used for energy simulation in building is described here.

NBMCW July 2014

Simulating oversize and heavy vehicle manoeuvres using AutoTURN® from Transoft Solutions

Narrow mountain roads, steep hills and challenging ‘S’ curves are just part of the landscape in the ‘toe’ of Southern Italy, where wind farms are becoming a common part of the countryside. With green technology like wind Read More ...

Atlas Copco XA316 and XAT266 portable air compressors for Mumbai underground metro line

Atlas Copco portable air compressors have been deployed for the first underground metro line in Mumbai, and they are not just under the supervision of Mumbai Metro Rail Corporation Limited (MMRCL) but also under Read More ...

Indira Paryavaran Bhawan - First On-site Zero Net Energy Building of India

A zero-energy or a net zero building is a building with zero net energy consumption from outside source, which means that the total amount of energy used by the building on an annual basis is almost equal to Read More ...

Making of a Green Data Centre

Data centres make up 3% of global energy consumption. The main reason behind data centres being major energy guzzlers is the IT processing power, which has increased substantially to meet the growing Read More ...

Apollo ValueTec Plant Gives Competitive Edge to Rana Builders

Dhaka-based Rana Builders (Pvt.) Ltd. specialises in construction of roads, bridges and buildings. When purchasing a new asphalt-mixing plant, it wanted a product that would help meet its objective of on-time delivery Read More ...

BHAI concrete batch mix plant working at Asia’s largest waste-water treatment plant

Delhi Jal Board is setting up a 318 MLD (70 MGD) wastewater treatment plant at GT Karnal Road on the outskirts of Delhi. The ₹414.78 crore project, said to be the largest in Asia, is being constructed by EPC contractor-Larsen & Toubro Read More ...

The Fast Lane to Growth

When the National Highways Authority of India (NHAI) last widened the Vijayawada-Chilakaluripet Highway in the early 2000s, the country was at the beginning of its exponential economic growth. Since then, the nation’s GDP Read More ...

Insitu Investigation of Cinder Mound For Building Construction - A Case Study

Cinder is a waste generated as coal residues from the blast furnace of thermal power plant. It was accumulated over a long periods near railway station, Jamshedpur, Jharkhand, India. This dumping Read More ...

SoilTech Mk. III - 3rd Generation nano-polymer stabilization

Golfshire is a super-premium residential project in Bangalore, comprising luxury villas, a 18-hole PGA standard golf course, a large convention centre with seating capacity of 5000, and a 5-star hotel. The project is Read More ...

Especially Designed Rope Suspended Platform for Dam & Silo Projects

New Age Construction Equipment Engineering Company is one of the leading manufacturers of construction equipment like Rope Suspended Working Platforms (Gondolas/ Cradles), Bar Bending Machines Read More ...

New Age Offers Customized Solutions with Higher Productivity & Safety

As a leading manufacturer of construction equipment, we believe in superior performance, higher productivity & safety, faster execution and timely completion of projects,” says Mr. Jayesh Vadukiya Read More ...

Rehabilitation of National Highway at Tripura-Assam

The National Highway NH-44 is a major road artery for the North-East. The stretch of this highway leading to the border of Assam and Tripura (two states in the north-east of India), is the only land-link between Read More ...

Wirtgen Milling & Recycling Machines give Excellent result at NH-2

Wirtgen most compact and versatile machines W2000 and WR240 have been used for milling and cold in situ recycling works by contractor Soma during the road rehabiliation of Varansi-Aurangabad section Read More ...

KYB-Conmat's Advanced Mechanization Parallel Lower Ganga Canal Lining Project

Tougher norms for quality & safety in the industry have pushed contractors & developers towards advanced mechanization for their projects to deliver quality results in set timelines. It has also Read More ...

3D Design Software Helps Engineers Prove Their Clients’ New “Home” is Ready for Work

Transoft VLMK
Whether it’s moving across town or across the country, there are always boxes to pack and trucks to fill. But what if the core of your business IS trucks and you didn’t have a choice about moving? That’s exactly Read More ...

Comparative Study of Basalt And Carbon FRP Bonded Steel Beams and its Finite Element Modelling

Finite Element Modelling
The use of Fibre Reinforced Polymer (FRP) sheets to strengthen the steel structures has become an attractive option which may ensure confident retrofitting of existing steel structures. Conventional strengthening Read More ...
NBM&CW

New Building Material & Construction World

New Building Material & Construction World
MGS Architecture

Modern Green Structures & Architecture

Modern Green Structures & Architecture
L&ST

Lifting & Specialized Transport

Lifting & Specialized Transport
II&TW

Indian Infrastructure & Tenders Week

Indian Infrastructure & Tenders Week