So lets show what wastes we are talking about:
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| This is where London sends at least 50% of their DOMESTIC wastes |
Sun Earth Energy
Cholera & Typhoid Crisis
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- Written by Super User
- Category: General
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Feasibility Studies to determine the scope and extent of replacing existing sewage and water infrastructure in Harare, Zimbabwe, So as to allieviate the outbreaks of Cholera and Typhoid which occur too regularly.
Scoping Doc Harare Zimbabwe
Sun Earth Energy Ltd as preliminary project managers -
Public Health Based Initiative – Based on Waste Collection, Sewage Systems and indirectly Water Supply
Based on the principles stated in the IWA [International Water Association] Wastewater Report 2018
Re-engineering of Harare Sewage Works, Sewage delivery infrastructures and refuse collection, to mitigate against pollution of water wells and the re-emergence of Cholera and Typhoid[1].
Engineering Practicalities - Lecture
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- Written by Super User
- Category: General
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About the lecturer
Michael Kelly ended his academic career as the inaugural Prince Philip Professor of Technology at the University of Cambridge. His main research focus was in new semiconductor physics and technology for ultra-high-speed electronic devices and the manufacturability of semiconductor structures at the nanoscale. His interest in the topic of this lecture was roused during 2006–9 when he was a part-time Chief Scientific Adviser to the Department for Communities and Local Government. When the Climate Change Act 2008 was signed, he pointed out to Ministers that 45% of UK carbon dioxide emissions came from heating air and water in buildings, 27% from homes and 18% from all others. He persuaded Lord Drayson as Science Minister to undertake a pilot programme called ‘Retrofit for the Future’, in which over 100 social houses were retrofitted to reduce their emissions. More on that in the lecture.
Combined Heat, Power and Cooling
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- Written by Lindsey Zaranynika
- Category: General
- Hits: 179
Combined Heat and Power Systems
Using energy efficiently has become a goal across industries in the past decade. Rising energy prices, an increasingly competitive marketplace, and environmental regulation of harmful pollutant emissions have all incited commercial and industrial energy users to search out the most efficient and cleanest ways to use energy.
One innovation that is finding applications in commercial, industrial, and even residential settings is what is known as Combined Heat and Power (CHP) systems. Essentially, this type of system takes the waste heat from the burning of fossil fuels and applies it to power another process. For example, a basic CHP system might generate electricity through a large gas-fired turbine. The generation of this electricity would produce a great amount of waste heat. A CHP system might apply it to heating an industrial boiler instead of allowing this heat to escape. In this way, more of the energy contained in the natural gas is used than with a simple gas turbine. This increases energy efficiency, which implies that less energy is needed to begin with (costing the user less), and fewer emissions are generated because a smaller amount of natural gas is used. Typically, a CHP system produces a given amount of electricity and usable heat with 10 to 30 percent less fuel than would be needed if the two functions were separate. A typical electric generation facility may achieve up to 45 percent efficiency in the generation process, but with the addition of a waste heat recovery unit, can achieve energy efficiencies in excess of 80 percent.
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| Combining Heat and Power gives big efficiency improvements |
CHP systems can be implemented to produce as much as 300 megawatts (MW) of electricity, to as little as 20 kilowatts (kW) of electricity, depending on the electrical and usable heat needs of the facility. It is not uncommon for larger cogeneration units to be installed in a facility that has very high space and water heating requirements, but lower electricity requirements. Under this scenario, the excess electricity is easily sold to the local electric utility.
Energy from Wastes
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- Written by Roman Health
- Category: Energy
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In my last blog I called for more effort on energy from wastes. I showed some nice pictures of Anaerobic Digester Plant in the Czech Republic. Who listens? Not many, I was not bold enough in my delivery..
So lets show what wastes we are talking about:
London is a great example. It generated hundreds and thousands of tons per year of domestic waste plus a further 16 million tons of commercial wastes (including construction materials). No, that is a lot of stuff.
So lets show what wastes we are talking about:
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