Ottv united nations framework convention on climate change. Ottv overall thermal transfer value is a key parameter for evaluating energy efficiency of building envelops in the present building code of sri lanka. What is the abbreviation for overall thermal transfer value. This paper attempts to formulate overall thermal transfer value ottv coefficients for composite, hotdry and warmhumid climates, the three main tropical climates in india. A survey has been conducted to investigate the ottv and the energy consumption of room air conditioners of the residential buildings in malaysia. Jul 01, 20 read evaluation of overall thermal transfer value ottv for commercial buildings constructed with green roof, applied energy on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Code of practice for overall thermal transfer value in. The effectiveness of the parametric design sudare blind as. The aim is to reduce overall thermal transfer value ottv of the facade. The ottv aims at achieving the design of building envelope to reduce heat gain through the building envelope and hence reduce the cooling load of the airconditioning system. In the past decade, there is increasing application of green roof into commercial buildings for enhanced building insulation, leading to reduction in heat gain through the roof area. Content of volume 06, issue 2 20 study on indonesian overall thermal transfer value ottv standard iman paryudi, stefan fenz, a min tjoa 4954 doi. The betterinsulated a structure is, the lower the uvalue will be.
Concept of overall thermal transfer value ottv in design of. In the building regulations, a design criterion for building envelope, known as the overall thermal transfer value ottv, has been adopted. Definisi dan teori ottv pada bangunan gedung ottv atau harga overall thermal transfer value suatu permukaan bangunan adalah suatu metode perhitungan yang dilakukan untuk menentukan secara teoritis besarnya beban panas yang akan masuk melalui. The aim of this paper is to interrogate the principle of heat gain by the overall thermal transfer value. Study of the effect of temperature differences on the overall. The methodology for developing ottv standards is explained and the ottv standards in some. Simulasi thermal stress pada tube superheater package boiler. Controlling building energy use by overall thermal. The ottv standard applied only to airconditioned nonresidential buildings. Overall thermal transfer values for building envelopes in hong kong. In tropical countries, the most effective passive design strategy method is the use of shading devices. It is a widely adopted measure in many countries for enhancing energyefficient building design. Overall thermal transfer value ottv has been adopted.
High performance facade and overall thermal transfer value. Since the current ottv calculation method including the ottv equations and coefficients was originally developed for buildings with. Thermal transmittance, also known as uvalue, is the rate of transfer of heat through a structure which can be a single material or a composite, divided by the difference in temperature across that structure. In 2008, the singapores building and construction authority bca shifted to envelope thermal transfer value ettv value of. Overall thermal transfer value ottv regulation, developed in a performancebased approach, is used to govern the design of a building envelope with an aim to reduce the electricity demand of airconditioning system and thus the emission of greenhouse gas. The ottv requirement, which applies only to airconditioned buildings, is aimed at achieving the design of adequately insulated building envelope so as to cut down external heat gain and hence reduce the cooling load of the airconditioning system. Looking for online definition of ottv or what ottv stands for. An opaque wall, heat transfer, heritage hospital facade, energy. It also acts as an index for comparing the thermal performance of buildings. Four existing airconditioned office buildings two midrise and two highrise were modeled as case studies using equest v. Comment on the overall thermal transfer value ottv for. In 2008, the singapores building and construction authority bca shifted to envelope thermal transfer value ettv value of 50 wattm2, while sni 0363892011 continues to use.
Overall thermal transfer value of residential buildings in. Overall heat transfer coefficients are dependant on many parameters such as the nature of the fluid, fluid velocities, type of heat exchanger, temperatures and fouling. Predetermined overall thermal transfer value coefficients. This paper inquires into whether overall thermal transfer value ottv is an appropriate building envelope energy performance index for use in regulatory control. Evaluation of energy and atmosphere section for thailand. Temporary shelter simulation towards effectiveness value. Selubung bangunan yang dimaksudkan adalah elemen bangunan yang menyelubungi bangunan gedung, yaitu dinding luar dan. Jul 15, 2019 the overall thermal transfer value ottv for all models on four design days is also shown in table 6. Heat transfers of building envelope are composed of two major components such as overall thermal transfer value. Chow division of building science and technology, college of science and engineering, city university of hong kong, tat chee avenue, hong kong. Oct 21, 2011 the output will be presented in charts and can be read easily. The indonesian national standard sni 0363892000 adapted the 1983 singapores handbook on energy conservation and limited the overall thermal transfer value ottv of the building envelope to 45 wattm2.
This is my third creation written in my private time. Ottv stands for overall thermal transfer value new construction energy efficiency. The overall thermal transfer value ottv standard has been implemented in hong kong for more than two years. The ottv equation was formulated by modelling a generic commercial building and using results from doe2 computer simulations as a database of heat gains. Feb 01, 2014 read calculation of overall thermal transfer value ottv for commercial buildings constructed with naturally ventilated double skin facade in subtropical hong kong, energy and buildings on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
The heat transfer coefficient is the reciprocal of thermal insulance. However, there are several approaches to determining the ottv that produce quite different results. Overall thermal transfer value ottv is one aspect of energy conservation. The ottvshould not exceed 50 w m2 concept of ottv ms1525. The concept of overall thermaltransfer value ottv is proposed to be used as a guideline for designing the building envelopes. The ottv should not exceed 50 w m2 concept of ottv ms1525. The government has issued ministerial regulations on building design, andbuilding envelope by selecting a method to reduce the overall thermal transfer value ottv as an important strategy 2. As a measure of building envelope performance, overall thermal transfer value ottv has been regulated in many countries and regions in the world, while little research is done to evaluate its cityscale effect with energy consumption. Yik and wan 2005 stated that the ottv is an appropriate building envelope energy performance index for use in regulatory control. It is the right time to reexamine it and to find out ways to improve its control. Pdf calculation and application of ottv overall thermal. Calculation of overall thermal transfer value ottv for. Ottv overall thermal transfer value in technology, it etc.
In this research, the prescriptive requirements mentioned in the building code for the. Overall thermal transfer value ottv is meant to measure the envelope thermal performance of air conditioning buildings that is followed an energy efficiency standard. Temporary shelter simulation towards effectiveness value of. The overall thermal transfer values ottvs of building envelopes in hong kong have been considered. Two values of ottv, one for summer and the other for winter, have been. As a measure of building envelope performance, overall thermal transfer value ottv has been regulated in many countries and regions in the world, while little research is done to evaluate its. Code of practice for overall thermal transfer value in buildings 1995 author. Ottv is a measure of heat gain into the building through the building envelope. In this paper, we develop an econometric energy epidemiology model to evaluate the impact of ottv legislations on electricity. Evaluation of overall thermal transfer value ottv for. Analysis of building envelops to optimize energy efficiency.
The output will be presented in charts and can be read easily. The doe2 program, developed at the us department of energy, has been used as the energy behaviour simulation tool. Ottv overall thermal transfer value ottv ian weekes. Ottv overall thermal transfer value in technology, it.
Parametric studies on a centrally airconditioned building were performed. Evaluation of overall thermal transfer value ottv for commercial. Calculation and application of ottv overall thermal transfer value and u value science teaching kit for senior secondary curriculum energy and use of energy organizer sponsor research team. Study on indonesian overall thermal transfer value ottv.
This study presents the overall thermal transfer value ottv and the energy consumption of room air conditioners of the residential buildings in malaysia. Download as ppt, pdf, txt or read online from scribd. This is used for building materials r value and for clothing insulation. Overall thermal transfer value how is overall thermal. Calculation and application of ottv overall thermal transfer value and u value science teaching kit for senior secondary curriculum student notes energy and. Evaluation of overall thermal transfer value ottv for commercial buildings constructed with green roof a. Ottv abbreviation stands for overall thermal transfer value. Concept of overall thermal transfer value ottv in design. The epi only shows the energy use index of that building, but it lacks the ability to define which factors in the building are leading to higher energy consumption.
Overall thermal transfer value ottv regulation, developed in a performancebased approach, is used to govern the design of a building envelope with an aim to reduce the electricity demand of air. Overall thermal transfer values for building envelopes in. An evaluation of the appropriateness of using overall. The study of using the opaque wall material to manage overall. Calculate the overall thermal transfer value ottv of a wall that is 10,000 ft in total area which includes 3000 ft2 of glass area. Controlling building energy use by overall thermal transfer. High performance facade and overall thermal transfer value ottv. This research aimed to examine the effective value of ottv energy overall thermal transfer value, differences in room temperature, and thermal comfort in existing temporary shelters. The year 1980 is taken as the reference weather year for hong kong. Report overall thermal transfer value shakti sustainable. Overall thermal transfer value ottv regulation provides a simple and easy approach for governing the design of a building envelope with an aim to reduce the energy consumption of a building.
Ottv is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms the free dictionary. It is verified that this criterion is known as overall thermal transfer value ottv. Despite all these determining parameters, typical overall heat transfer coefficients are available for common applications and fluids. Parameterization study of the overall thermaltransfer value equation. Energy efficiency towards building envelope an analysis. Code of practice for overall thermal transfer value in buildings 1995. Study of the effect of temperature differences on the. Overall thermal transfer value ottv is used as a control parameter for building energy use in the hong kong special administrative region hksar. Influence of inclined wall selfshading strategy on office. Teori ottv sni 036389 2000 overall thermal transfer value adalah angka yang ditetapkan sebagai kriteria perancangan untuk selubung bangunan yang dikondisikan. This has to meet the minimum overall thermal transfer value ottv of 35 wattm 2. A simplified overall thermal transfer value equation for building.
Overall thermal transfer value ottv is a measure of average heat gain into a building through the building envelope. Overall equipment effectiveness pada mesin discmill di pt tom cococha indonesia. Acronym abbreviationslang ottv means overall thermal transfer value. Analisis oee overall equipment effectiveness pada mesin discmill di pt tom cococha indonesia. Pdf concept of overall thermal transfer value ottv in. This study attempts to use overall thermal transfer value ottv as a performance criteria other than the energy performance index epi. The suitable level of ottv and the methodology of ottv calculations are specified in the code of practice for overall thermal transfer value in buildings 1995 the ottv code published by the buildings department bd. Overall thermal transfer value ottv is taken as a parameter for controlling the building energy use in many places such as the hong kong special administrative region. Pdf overall thermal transfer value control of building. Proceedings of the oneday symposium on building, energy and enviornment, shangrila hotel, kowloon, hong kong, october 16, 1997, p. Perhitungan overall thermal transfer value ottv pada studi. It is a performancebased building energy code and is widely adopted as part of the requirements in building energy standards in many countries and cities. The overall thermal transfer values ottvs of building envelopes in hong kong. Concept of overall thermal transfer value ottv in design of building envelope to achieve energy efficiency.
Ottv is defined as overall thermal transfer value new construction energy efficiency frequently. Science teaching kit for senior secondary curriculum. Ottv overall thermal transfer value new construction. This extension helps you calculate the overall thermal transfer value ottv of buildings in hong kong from a simple sketchup model.
Ottv values and thermal comfort are adapted to indonesias humid tropical climate, which has a temperature ranging 2430c and air humidity of 75%. Recently, jakarta has implemented a new standard for new building construction to reduce the energy consumption of office buildings. Menghitung ottv overall thermal transfer value download 5 halaman gratis. Ottv sni 0363892011 and ettv bca 2008 calculation for. This paper discusses the significance of the overall thermal transfer value ottv controls as a means of enhancing energy efficiency of buildings. The impact of minimum ottv legislation on building energy. Overall thermal transfer value ottv is taken as a parameter for controlling the building energy use in many places such as the hong kong special administrative region hksar, formerly hong kong. In the past decade, there is increasing application of green roof into commercial buildings for enhanced building insulation, leading to reduction. Menghitung ottv overall thermal transfer value download 5 halaman.
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