http://www.theiet.org/forums/forum/index.cfm?forumid=1 FuseTalk Standard Edition http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=52531 2013-05-18T06:44:04 00 onapthanh 1 Energy includes two types: Renewable energy and non-renewable energy. At present, our country as well as many other countries are exploiting 4 commercial energy is traditional hydropower, coal, oil - and gas atoms. In addition to hydropower as renewable energy, the remaining 3 types of non-renewable forms of energy, that is exploited to a certain level will end.
Use energy needs associated with environmental sustainability, restrictions affecting climate change. And the new trend of using energy resources avail endless, environmentally friendly and renewable energies such as solar, wind, tidal, wave, hydro, nature waste, ... At present, most people are aware of solar energy is very large, easily obtained, and is well suited to the climate in Vietnam. Vietnam is a country with an average of 1 day sun is high, about 5 hours of sunshine / day. This is a very favorable conditions for efficient use of this energy source [on ap standa \ on ap standa toton ap standa]
A public lighting system needs to meet the conditions for stability, reliability, safety and urban landscape while saving electricity is a requirement of urban areas and cities. To accomplish this goal need to adopt measures illumination-application of new technologies for energy saving street lighting and traffic in Vietnam today.
2. System Requirements
A block diagram for a lighting columns as follows:
The system will consist of building components:
- Solar 12V DC power supply [on ap rsc \ onaprsc totonaprsc]
- Power adapter (charger, DC / DC, Inverter DC / AC, battery)
- Power supply (12V power supply for LED lights).
- LED lighting.
- LED controller.
- Lampposts.
The principle of the system:
- The lampposts activities independently. Each light pole will be attached a system of LED lights, one controller.
- Control the light by the potentiometer controls for the lighting circuit. For example, when it starts up, the lights began to dim, when it gets dark, the light stays permanently at full capacity ..
- Programming schedule for lighting by time of day, by day of week, holidays, timetables for outdoor lighting, ensure adequate lighting for security requirements and safety . We use these buttons to control the lighting system. For example, the default button when the light sensor detects the light does not light, turn off the light sensor detects light ...
- Solar cells to provide power to the system circuits, sensors .. battery to recharge for the night will be used to provide the LED system.
3. Theoretical Foundations
3.1. DC / AC
Purpose:
- Use solar power
- Power Supply AC 220V - 50Hz stable
Ingredients:
- Solar Cells
- The Battery
- Battery Chargers
- The converter Converter DC / DC
- The inverter DC / AC (12VDC/220VAC)
Activity:
- Solar DC power supply, the charger will be passed on Battery charger. The inverter takes the DC power input and the output is 220V 50Hz AC power.
During normal operation, the input DC voltage is supplied by solar panels. When the battery is charging systems, high voltage stage to accept the battery down and charge the battery voltage level. When the battery is fully charged, the battery charger switch to stand-by mode.
In the case of input power failure occurs, the system will take a way from the battery source. When this adapter DC / DC mode work boots. The purpose of the converter DC / DC to DC power is increased and the removal of the unwanted components in order to provide stable DC power for the inverter. The converter DC / DC will generate output voltages 440V between the poles, 220V-220V at the anode and the cathode.
Inverter DC / AC converter using a DC voltage of the output pulse voltage is approximately sinusoidal shape. The purpose of the adapter is to provide a voltage output frequency is determined by the reference signal. A sinusoidal reference signal is compared with 1 strip of symmetrical triangular wave signal resulting pulse width modulated.
Pulse input range is 1 LC filter, creating a sinusoidal voltage supply to the load. When 12V DC input is provided by solar cells due to any other reason that, the system still provides 220V AC power load stability.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=52479 2013-05-14T15:38:49 00 CelticHeathen 2
I am doing a Project as part of my MEng on the effects of SCC and Cyclical Fatigue on structural failure (specifically bridge failure) and wondered if anyone can recommend any good sources on either (or both) subject?

Thanks in advance for any input offered.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=52405 2013-05-09T02:30:05 00 annasalizzato 1 UK wind turbines and solar panels in Cornwall.
Image Credit: Shutterstock
The survey, DECC Public Attitudes Tracker, was run from early 2012 through to last March. There were four surveys - one longer survey and three shorter ones - concluded with a face-to-face in-home interview with a representative sample of 2,051 households.


Read More
http://cleantechnica.com/2013/...gy-continues-to-grow/

Related Source
http://crowncapitalecomanagements.newsvine.com/
http://www.sba.gov/community/d...-options-crown-capital]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=52378 2013-05-07T15:08:36 00 drbrucmeister 1
More: The Technology Strategy Board (TSB) and The Defence Science and Technology Laboratory (Dstl) are to invest up to £3m in the development of innovative sensing for asset protection. This competition will be funded through the Small Business Research Initiative (SBRI). Under SBRI, developments are 100% funded and focus on specific identified needs, increasing the chance of exploitation. Suppliers for each project will be selected by an open competition.

More Information

A Competition Briefing will be held on the 14th of May 2013, Ambassadors Bloomsbury, 12 Upper Woburn Place, London, WC1H 0HX]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=52360 2013-05-06T04:35:02 00 annasalizzato 1 Growing shortages of key inorganic elements, such as rare earth elements for all our electronic gadgets and renewable energy systems, platinum and other related metals, and even helium for medical equipment (yes, and balloons!), suggest that we may need more non-renwable resources than Earth can provide (He shortage; REE shortage).

Visit http://chirpstory.com/li/47332]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=52240 2013-04-26T08:07:58 00 sodahassan30 1
Just under 20 percent of Indonesians live on less than US$2 per day. Despite this, the UK decision concluded a decade-long decline in UK aid spending in Indonesia in areas such as health and humanitarian assistance. At the same time, it mirrors a lamentable trend among Western donors to reduce spending on programs that promote economic growth.

By this action, the UK effectively denounced a formal commitment made in 2009, along with other donors, to align aid programs with Indonesian development goals. This was called "The Jakarta Commitment". Fourteen donors pledged to support leading Indonesian priorities such as governance, education, health and the reduction of poverty.

But even by 2009, UK bilateral aid spending in Indonesia (around £10 million a year) had come to be dominated by two policy areas: illegal logging and low carbon development - particularly relating to deforestation.

A key British strategy was to take the lead in promoting an EU program in Indonesia on illegal logging. The program encouraged and pressured - under threat of restricting trade - Indonesian authorities to comply with EU demands on timber exports under a bilateral agreement, and cease any further clearance of natural forest.

This was part of a larger EU campaign on global timber regulation across a number of countries for which the UK has been lead advocate.

But this relatively small UK bilateral program in Indonesia was set to deliver a much bigger result than most. The problem is that the impact is negative.

Economic modeling commissioned by the European Commission estimates that the Department of International Development (DFID) policy approach to illegal logging would have a detrimental impact on Indonesia's forest sector. It indicated the economy could lose around $2.1 billion and around 450,000 jobs.

And in the case of the global campaign on illegal logging, not a single agreement is currently operational in the ten years since the EU committed to it.

That is not the end of it.

More than half of UK bilateral aid spending is being used to promote environmental strategies to make Indonesia a low carbon economy - particularly in relation to deforestation.

Development agencies and forest experts now generally recognize that that the leading driver of deforestation and forest degradation is not timber production - it is food production. Some estimates put agriculture's share at close to 75 percent. It is also recognized that the majority of this is from clearing of forest land by subsistence and small-scale farmers.

The UK's DFID's own policy states that the UK must demonstrate that the "low carbon economy" model is viable. It has not done so.

Unsurprisingly, not a single investor has been found for a £10 million project designed to attract low-carbon investments in Indonesia.

Why would an agency that is supposed to reduce poverty spend money that damages economies?

The key motivation for DFID appears to be to advance the UK's foreign policy goals rather than support development outcomes for Indonesia.

When UK Prime Minister David Cameron and Nick Clegg announced the reorientation of DFID spending in 2011, they declared that support for halting deforestation and tackling climate change would continue.

The UK has undertaken a concerted effort to make forest policy a key international issue since 1998. Former UK prime minister Tony Blair put in on the G8 agenda. DFID has made this a leading priority ever since, despite FAO statistics showing a steady decline in the rate of global deforestation.

DFID's international efforts to promote action on greenhouse gas emissions focused on generating support for action by developing countries in the lead up to the 2007 Climate Change conference in Bali.

In 2006, a report by UK Treasury official, Lord Stern, argued developing countries would be worse off if they did not act quickly to substantially greenhouse gas emissions.

The report did not alter the thinking of major developing economies. Development economists considered the report flawed, overstating the benefits and understating the costs of dramatic action to reduce emissions.

The UK appeared to focus on Indonesian policies in the same period. DFID spent almost £450,000 in the lead up to the 2007 UN climate conference. One report it supported claimed Indonesia was the third-highest emitter of greenhouse gases. The Indonesian government reported numbers to the UN showed clearly it was not, but the canard remains part of climate change lore.

DFID also supported building capacity for foreign campaign groups and NGOs to lobby it for policy action on climate change and forest protection. And in Indonesia, with other foreign donors, supported projects to demonstrate how Indonesia could replace productive industries that promote growth and create jobs with substitute low carbon emission activities, like tourism.

Its current projects in Papua appear to promote locally-based activism in the name of climate change against government resource development plans. In 2011, DFID Indonesia officials stated that they have "never treated development and environmental protection as being automatically in tension". It's time they did.

DFID itself has acknowledged that climate change and deforestation are not priority areas for Indonesian society at large.

The question to DFID is whose interests its aid is serving?

The UK has used aid for years to advance its own national interests. One long-standing goal was to reduce Britain's trade deficit. DFID was originally established to remove aid policy from the dictates of other UK departments of state. It seems those who set aid policy have fallen back to their old ways.

DFID should suspend all environmental and climate change related aid programs to Indonesia and commission an independent internal inquiry into the underlying costs and impact of such programs.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=52025 2013-04-14T09:26:39 00 benmc 2 If anyone could help out that would be great,
I'm currently doing my BEng in E and E and for my final year project I am retro fitting VFD and PLC control to a long travel system on a crane(currently uses rotor resistance)

For calculating the correct size DBR one of the values I need is KgM^2 (inertia) I've looked over the old manuals for the crane but can only find KgM for each gearbox (4, 1 each corner) how would I go about calculating the inertia for the crane ?

Sorry if seems a bit vague and thanks in advance]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=52016 2013-04-12T16:52:37 00 AdrianRatter 4
Does anyone have a details of or a reference to information about
the time to charge a modern storage heater brick pack to the
thermostat set point.

I was also interested in comparisons between individual stand alone
heaters and centralised ducted air units.

Many Thanks
Adrian]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=51856 2013-04-03T11:35:57 00 JordanM 2
Once I'm in, I'll be replacing it with a catergory D cover but, on moving day, I'm thinking of placing protection over it (something like 6mm checker plate) to ensure that we don't break the lid, and end up stranded!

My query is that I can't seem to find a reliable source of information on maximum loadings for something like checker plate, and wondered if anyone here was in possession of such.

Kind regards,
Mark]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=51753 2013-03-27T17:25:01 00 snobinskaria 1
My background is Building Services in Dubai and opt can only distance learning only.

Please suggest if any other options

Thanks]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=51732 2013-03-26T18:12:45 00 metsystem 1
I'm looking for some guidance on the do's and dont's of contactors and where they can be placed in motor circuits, and hope someone may be able to help.

I have a situation where I need to put remote reversing of a pump via a dialup RTU. Its been fine with Star Delta anfd DOL, as well as with some VSDs as there is sometimes a parameter option to enable reverse control.

However, I have a softstart that I want to reverse. I was going to put the reversing contactor on the line side but believe some units will detect phase rotation errors, therefore want to put the reversing contactor on the load side. The main question I have is; will a standard power contactor be suitable for the high frequency thyristor switching that a softstart delivers??

Any thoughts would be greatly appreciated?

Regards

Alex Gray IEng MIET]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=51170 2013-03-01T10:55:56 00 sohaibqamer 2
I'm working on a project which involves designing a private mobile radio (PMR) for a stadium and i'm struggling to find the attenuation for regular building materials at 450 MHz to do the modelling.

Any help or advise would be appreciated in this regard.

The building materials i'm working on are concrete, blockwork with concrete in-fill, drywall, external and internal glass, wood and metal.

Thank you.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=50578 2013-01-29T19:39:04 00 SKElectrical 2 Can they be used as the sole source for a large open plan office?
Is there not a risk of high heels getting snagged?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=50208 2013-01-10T09:57:41 00 JakeRoll 9 Even in building construction, what are the things to do to avoid dangers?

Is there any programs that can equip employees to be on guard and be safety anytime and anywhere?

Thank you all.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=49180 2012-11-12T15:07:16 00 prbens 2
NPL want to hear what measurement challenges are out there currently and what are likely to exist in the future.

What issues are there around the calculations/ models used?
What information can/ can't we derive from the data we have, what else can we do with it?
Do we have enough empirical data?



NPL are currently running an event to get community insights - if interested please register to come along. If not, you thoughts are welcome here. The event details are here: http://www.npl.co.uk/events/5-...ilding-performance-gap]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=49027 2012-11-01T20:49:04 00 MHIJAZI84 3

I am looking for help with setting up a lightning protection for a house 200 meter squared area. I would like to know what are the requirement for such a system to be set up and the standards if possible. any technical data will be appreciated.

Thanks for your help and time.

Respectfully Yours

Mohamad Hijazi]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=48750 2012-10-12T11:02:07 00 ESOMER 6 http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=47902 2012-08-08T15:15:43 00 danjtaylor 2
Many Thanks]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=46936 2012-06-08T15:42:01 00 IanDowney 1 IAP Deadline Extended for Call for User Ideas on Critical Infrastructure
The call now closes on June 30th

The Integrated Applications Promotion (IAP) programme of the European Space Agency (ESA) is inviting public and commercial end-user organisations to propose ideas and suggestions for new services in Critical Infrastructure as defined below. The aim is to generate ideas leading to services that will improve business performance and operations, help enforce new regulatory standards, or enable improved resilience.
The ideas will be used to help define and consolidate requirements for user-driven services supported through the IAP programme.

How to Participate?
Full details of the Call and on how to submit your ideas online can be found at: http://iap.esa.int

You can also download a MS-Word version of the User Response application form template to work offline and email it to: iap@esa.int with the words "Critical Infrastructure" in the subject line.
Your ideas and suggestions should reach us by 30th June 2012.


Critical Infrastructures

Critical Infrastructures can be defined as those handling essential goods (e.g. water, energy, food, confidential information) and/or services (e.g. health, financial transactions or resilience services). Infrastructures are critical when they represent key enablers in a large variety of economic sectors. Loss or damage of critical infrastructure would have a severe and widespread impact, e.g. disruption of supplies or services, injury or loss of human lives, risks to or destruction of the environment, breach of national security or economic interests.

Criticality is also determined by the level of endangerment the infrastructure is subject to, and by its vulnerability to such hazards. Infrastructures are particularly exposed to hazards when physically spread out, e.g. linear infrastructures such as pipelines. Hazards can be diffuse (e.g. low intensity hazards affecting infrastructure over a long period of time) or acute (e.g. sudden attacks, accidents, natural hazards). They can also be predictable (e.g. corrosion) or unpredictable (e.g. tsunami or terrorist attack).

Hazards to critical infrastructure need not only be physical. For instance, cyber attacks may damage internet-linked control systems that are related to critical infrastructures such as the electrical grid, water treatment facilities, refineries, pipelines and dams.

Critical infrastructures are most often man-made, such as power plants or airports. Yet they can also be natural. For example, wetlands are a natural infrastructure that store water and thereby mitigate floods.

Critical infrastructures typically enable the production, processing, transportation, storage or protection of essential goods, as well as the provision of basic services such as:

Water (e.g. water pipes, treatment plants, water towers, dykes, dams, canals).
Food (e.g. roads, warehouses, ports).
Energy (e.g. pipelines, refineries, energy grids, power plants).
Confidential or critically sensitive information (e.g. telecommunication infrastructure).
Health and well-being (e.g. hospitals, waste treatment plants).
Environmental protection (e.g. pollution prevention, CO2 storage).

Call for User Ideas

Themes that it is intended to cover in this Call for User Ideas include (but are not restricted to):

Mitigation: Deployment of protective systems to prevent damage or disruption by resilience to hazards. For mitigation of cyber attacks this should include encryption techniques and other methods.
Preparedness: Monitoring conditions and taking preventive actions, e.g. identification, monitoring & quantification of hazards, vulnerability and risks; infrastructure health monitoring; preventive maintenance.
Response: Activation of emergency spare capacity to satisfy peak demand, or to back-up failed infrastructure, e.g. space telecommunications as a back-up communications infrastructure.
Recovery: Supporting strategies minimising the propagation of negative effects caused after disruption such as evacuation of people and emergency repairs, and help in the assessment of damage caused to or by disrupted infrastructure.

The Call for User Ideas on Critical Infrastructure is driven purely by the users' perspective and their needs. The ideas submitted will be used to help define and consolidate themes and priorities of future IAP projects. This may include both Feasibility Studies (through Open Competitions or Direct Negotiation), or directly through Demonstration Projects.



Your ideas and suggestions should reach us by 30th June 2012.

Please be assured that all inputs will be treated confidentially.

Your ideas are highly valued, and will help shape the IAP programme of ESA in order to meet your needs.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=46673 2012-05-21T11:05:16 00 leroyluar 2
Not certain if this forum is the correct one to be asking for opinions on this so do advice on correct thread if this isn't it.

This follows inquiries on a tower crane crash in Malaysia in October last year and we were wondering if anyone here could provide some insight on whether the crane was compliant (based on news photos released)?

Original article (it's in Chinese, do forgive us): http://chinese.cari.com.my/news/news.php?id=135220

Isolated photograph of rogue crane:
http://www.kwongwah.com.my/news/2011/10/04/110_1.jpg

Do respond here or send response directly to me at leroy_luar@hotmail.com. Thanks much for your help ]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=46196 2012-04-17T17:04:20 00 haguetim 17
Is it standard UK short sightedness perhaps?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=46185 2012-04-17T10:09:47 00 jcm256 6
Taken from a leading newspaper today:

The situation can be summed up simply as 'never in the history of public subsidy has so much been given to so few for so little public benefit'," the group concluded.

http://www.telegraph.co.uk/new...-short-of-bribery.html]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=46156 2012-04-14T14:49:32 00 XY606 5 I am new here and glad to find this sector of building environment.
Recently I am doing some research about daylight system.
Just a quick question, is there any way to find an accurate weather data file of Nottingham, which can be used on computer software?
It is very unfortunate both Energyplus and Ecotect library don't have this file.

Many thanks in advance.
XY]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=45542 2012-03-05T15:54:50 00 roger303 15 Been writing about the Urban Heat Island effect due to the vast amounts of landscape overtaken with tac mac especially in the UK, from my understanding (which is minimal on this subject at the moment) we could reduce the Urban Heat Island effect by colouring tarmac producing a lighter colour. Also Green roofs could help but how do structures react to having green roofs ( i know that roofs are designed to carry vast snow loads which may never occur in the buildings life) but can green roofs be added to existing structures? or is it just viable to be incorperated into new builds? If anyone has a knowledge of environmental engineering or a structural engineering knowledge, I would be greatful any input or suggestions
Thanks
Tony
http://www.stilwell-ltd.co.uk/]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=45228 2012-02-15T13:40:17 00 stevefleming 5 http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=43478 2011-10-25T10:44:46 00 anthonybates1980 3
I am trying to find some guidance regarding the minimum height of LEV stacks above the highest point of a building. I seem to remember three meters above the Apex for a LEV discharge but any confirmation of this or further advice would be appreciated.

Thanks in advance

Tony]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=42034 2011-07-17T23:09:12 00 MickeyB 5
I'm looking into creating a website that will act as a database of design and construction information relating to the buildings sector, similar to Wikipedia but for construction and design professionals to refer to. Schools, hotels, commercial office, casino's etc..

The information would not be 'text book' information, but taken from real 'projects' with real input from the engineers, consultants and contractors that created it.

I appreciate that there may be issues related to 'licensing' or 'copyright' of the information... this is something that I am looking into to avoid any contractual issues.

Would a website such as this be of use?
Any comments/ items that a website such as this should contain?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=202&threadid=40658 2011-04-06T13:32:03 00 Antonyw 9 Where would people/members find this branch of engineering under, I can't see one specific in the present headings.
Perhaps the IET could add Built Environment which would probably cover it.]]>