Energy Monitoring Articles
-
Energy efficiency and a cold marriage
Normal.dotm 0 0 1 533 3043 Digital Reality Portland LLC 25 6 3737 12.0 0 false 18 pt 18 pt 0 0 false false false /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; ...
-
Soot level – a diesel engine lube oil condemning limit
While there is widespread disagreement on used-diesel oil condemning limits, it is well known that excessive soot in the lube oil causes abnormal valve and injection-train wear. It can also increase exhaust emissions and clog filters. Typically, the suggested limit for soot is in the neighborhood of 3% but can go much higher. With the new ASTM Method D7686, truck, bus, ship, locomotive, and ...
-
Learning curve proving steep for the Indian CSP industry
Phase 1 of the National Solar Mission aimed to provide India with a learning curve for its first steps into CSP, with recent developments suggesting that there are many lessons to take into the next phase. In a recent interview Tarun Kapoor, Joint Secretary at the Ministry of New and Renewable Energy (MNRE), attributed delays in CSP project development to problems in the supply of critical ...
-
New global assessment reveals nearly 1,200 proposed coal-fired power plants
Coal-fired power plants are a major source of greenhouse gas emissions—one that could be increasing significantly globally, according to new analysis from the World Resources Institute. Several months ago, WRI began compiling and analyzing information about proposed new coal-fired plants in order to assess potential future risks to the global climate. We released our findings today in the ...
-
The hydrolysis and biogas production of complex cellulosic substrates using three anaerobic biomass sources
In this study, the ability of various sludges to digest a diverse range of cellulose and cellulose-derived substrates was assessed at different temperatures to elucidate the factors affecting hydrolysis. For this purpose, the biogas production was monitored and the specific biogas activity (SBA) of the sludges was employed to compare the performance of three anaerobic sludges on the degradation ...
-
Worldwide energy savings, no magic required
Is all this effort to save energy worth it? Consider this. Had we neglected energy efficiency from 1980 to 2010, worldwide energy use would be 35 percent higher. What does this mean? Look at the amount of energy used in the world’s two largest economies – the United States and China. That’s about how much energy the world saved. This comes from World Energy Outlook 2012, ...
-
Benchmarking of low 'exergy' buildings
An optimisation of the exergy flows in buildings and the supply structures related to them, similar to other thermodynamic systems, can help in identifying the potential of increased efficiency in energy utilisation. The low exergy (LowEx) approach entails matching the quality levels of exergy supply and demand to streamline the utilisation of high–value energy resources. This approach is the key ...
-
Understanding and improving energy conversion systems with the aid of exergy–based methods
Exergy–based methods are powerful tools for developing, evaluating and improving an energy conversion system. Conventional exergy–based analyses have limitations, which are significantly reduced by the so–called advanced analyses. The latter evaluate: (a) the interactions among components of the overall system, and (b) the real potential for improving a system component. The main objective of ...
-
Exergetic and sustainability performance assessment of geothermal (ground source) ejector heat pumps
Although ejectors have been used in cooling/refrigeration and Heat Pumps (HP) applications for a long time, utilisation of Geothermal Ejector Heat Pump (GEHP) with Ground–Heat Exchanger (GHE) is a new idea, which has recently appeared in the literature. In this study, we model a GEHP system with a GHE in terms of exergetic aspects and apply our model to this system in the heating mode. The system ...
-
Performance analysis of an irreversible regenerative intercooled Brayton cycle
The influences of the number of heat transfer units distribution, cycle pressure ratio, specific heat ratio, etc. on the performance of an irreversible regenerative closed intercooled Brayton cycle are investigated in terms of thermal efficiency, thermodynamic efficiency, dimensionless power, entropy generation number and Ecological Coefficient Of Performance (ECOP). Different performance ...
-
A study on the thermodynamic analysis of a cascaded latent heat storage system over the single storage tank system for diesel engine waste heat recovery
This article presents the comparison of performance of a cascaded Latent Heat Storage (LHS) system over the Single Storage Tank (SST) system for heat recovery from a diesel engine. The energy and exergy saved and efficiencies during the charging process are evaluated and reported using actual system data. The discharge process is analysed with a case study and it is concluded that it is possible ...
-
Debunking efficiency misconceptions
Your clients may hold some common misconceptions about how to begin conserving energy in their homes. In this article, I hope to debunk a few of those misconceptions. An audit from a company like EnergyLink is a good place to begin; it shows homeowners where to concentrate. A report called Driving Demand for Home Energy Improvements looked at successful and unsuccessful energy efficient ...
-
Strict Security Requirements and an Extensive Headquarters Location Lead Allstate to Select eSight
Bringing in over $32 billion in revenue in 2011, Allstate is the nation's largest publicly held personal lines insurer and one of the country's leading insurers in urban areas. Allstate encompases more than 70,000 professionals made up of employees, agency owners, and staff. Allstate helps nearly 16 million households insure what they have today and prepare for tomorrow. The Requirement In ...
-
Case study: Roager Bioenergi
Substrate: Energy crops, animal manure, other organic material Biogas flow: 1.200 Nm3/h H2S inlet: 2.000 ppm H2S H2S outlet: 50 ppm H2S Year of Installation: 2011 Roager/Lundsby Bioenergi is located in the southern part of Denmark. It is a unique biogas plant as the input is a mixture of animal waste, energy crops and other kinds of biomass. In order to achieve the desired biogas production the ...
-
Survey: What will it take to make buildings more energy efficient?
Companies are unaware of the actual costs of their energy use. Less than a third have commissioned energy audits for their buildings. Further, two thirds of those surveyed overestimate the cost of energy efficient construction. A surprising 75 percent saw benefit in energy regulation and described lack of enforcement as a problem. The solution Not too much carrot and not too much stick, ...
-
Thermal behaviour study of senakin coal and Refuse Derived Fuel (RDF) blends during pyrolysis using thermogravimetric analysis
Preliminary Thermogravimetric (TG) studies of pyrolysed Refuse Derived Fuel (RDF)–coal blends (20 to 80%) at various heating rates, 20, 40, 60 °C•min–1 have been performed to develop an efficient locally sourced renewable solid fuel. The characteristics of the coal/RDF blends followed those of the parent fuels in additive manner. Among the tested blends, 50:50 blends showed the optimum blend ...
-
Correlation model of hourly diffuse solar radiation based on ASHRAE model: a study case in India
Measurements of diffuse and global solar radiation carried out from January 2001 to December 2005 at Ahmedabad, Mumbai, Calcutta, Chennai and Pune cities of India, representing varying weather conditions of the entire country, have been used to develop the correlation model for the estimating hourly values of diffuse solar radiation on horizontal surface. The comparisons of the present estimated ...
-
Emissions and performance from a biomass boiler for different solid biomass fuels
During biomass combustion, a number of physical and chemical processes occur in time and space during the combustion. The processes include: drying and preheating of the fuel, pyrolytic release of volatile matter, glowing combustion char, etc. In general the combustion of biomass produces, next to energy, ash, carbon dioxide and monoxide, unburnt hydrocarbons, oxides of nitrogen, particulate ...
-
Comparative assessment of injection, combustion, performance and emission characteristics of a diesel engine for biodiesel–diesel blends
The effects of different percentage of biodiesel diesel blends on injection, combustion, performance and emission characteristics of a constant speed diesel engine are analysed. The dynamic injection timing advanced with all blends. The in–line pressure and in–cylinder injection duration increased for the biodiesel blends in order to maintain same power output. The premixed combustion and total ...
-
Potential use of carbon dioxide by microalgae in Malaysia
CO2 emission, which is feared to bring more harm than benefit to the environment, can be prevented and reduced through the cultivation of microalgae. Microalga is the fastest growing organism (estimated 40 times faster than terrestrial grass) and requires a high CO2 concentration to reproduce. Thus, this work evaluates the potential of microalgae to utilise CO2. The tolerable concentration of CO2 ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you