HVAC (heating, ventilation, and air-conditioning) systems vary depending on the complexity of room units size from single rooms to large systems, central control, which serves several areas of a building. In large, modern office buildings with heat gains from lights, people and equipment, interior spaces often require constant cooling. Rooms within the building itself (rooms with exterior walls, ceilings or roofs), it may be necessary to heat and / or cooled the weather conditions change hourly or daily outside. In buildings over one story in height, perimeter zones in the lower levels tend to be the penetration of air infiltration without so much control. (more…)
In today's times staying in a budget is very important. So doing maintenance to certain things yourself can be a good way to st ...
Power generation and distribution networks are built with spare capacity to meet peak periods of energy consumption is usually ...
If a space is occupied on a predictable schedule, you can use either timeclocks or setback thermostats to turn the conditioning ...
Exposure to air pollutants and air pollution problem are very high in indoor environments in developing countries. Smith has es ...
Don't sweat it out when you don't have to. Got your A/C running and still feel warm? Here are some tips that will help keep you ...
Different lasers use different materials as the active medium. The medium can be either solid, liquid, or gas, and there are advantages for each in the amount of energy that can be stored, ease of handling and storage, secondary safety hazards, cooling properties, and physical characteristics of the laser output. (more…)
There are literally thousands of uses for lasers. One of the largest applications is telecommunications—sending a signal throug ...
The word “laser” is an acronym for “light amplification by the stimulated emission of radiation.” Lasers of all kinds consist o ...
The first known laser was made by Theodore Maiman at Hughes Research Laboratories in Malibu, California, in 1960, but the seeds ...
Several molecular systems have been constructed that mimic various aspects of photosynthesis. Two of these utilize molecular system ...
It is known that laser printers print faster, but swallow a large amount of energy, even if the printer is in the energy saving ...
There are numerous possible applications for hybrid power systems. The most common examples are (1) remote AC network, (2) distributed generation applications in a conventional utility network, and (3) isolated or special purpose electrical loads.
The classic example of the hybrid energy systems is the remote, diesel-powered AC network. The basic goal is to decrease the amount of fuel consumed by diesel generators and to decrease the number of hours that they operate. The first addition to ‘‘hybridize’’ the system is to add another type of generator, normally using a renewable source. (more…)
The term hybrid energy system refers to those applications in which multiple energy unit conversion devices are used together t ...
The characteristics and components of a hybrid system depend greatly on the application. The most important consideration is wh ...
Renewable energy generators are devices that convert energy from its original form in the renewable energy source into electric ...
The primary electric drivetrain components for fuel cell vehicles are the same as those for any electric vehicle: traction motors, ...
The term cryogenics derives from the Greek kryos, for icy cold. The upper limit that characterizes the cryogenic region of the temperature scale is subjective. If the delimitation criterion takes into consideration practical reasons, then this upper limit can be established at a higher than usually declared value (120 K) in order to include natural gas fuel liquefaction. The cryogenics region of the temperature scale 0–120 K can be divided into sub regions according to the criteria of the cryogenic method and refrigerant (known as crycoolers) as follows: (more…)
The idea of using an absorption fluid as a refrigerant carrier derived from the drawback of VCR (vapor–compression refrigeration) s ...
Micro technology can be employed to produce miniaturized refrigeration and cryocooling systems. Although process intensificat ...
The issues of hydrogen storage run through the hydrogen production, hydrogen transport, supply and demand for end use of hydrog ...
n fabricating microscale energy systems, a number of operating conditions must first be taken into account. Foremost are the op ...
Many small-scale energy systems require effective miniaturized pumps and expanders. These devices are responsible for conveying ...
The idea of using an absorption fluid as a refrigerant carrier derived from the drawback of VCR (vapor–compression refrigeration) systems that the gas compression requires a high work input. A pump that requires practically no work to increase the pressure in the refrigeration system replaces the complicated and work-consuming compressor. There are two major advantages of absorption refrigeration systems (ARSs) compared with VCRs (vapor–compression refrigeration): No CFCs or HCFCs are used as refrigerants, and they use heat from different sources, such as combustion, industrial processes, waste heat (an economical solution for recovery), or solar heat. (more…)
Heat-actuated heat pumps are cooling systems requiring no electricity for operation. Rather, a heat source is used, avoiding the ne ...
The term cryogenics derives from the Greek kryos, for icy cold. The upper limit that characterizes the cryogenic region of the temp ...
Separation is a unit operation used in absorption heat pumps and chemical processing applications such as solvent extraction and pr ...
Active solar hot water systems water are usable with air, liquid, vapor or liquid collector fluid or gas to liquid process. Hot ...
Micro technology can be employed to produce miniaturized refrigeration and cryocooling systems. Although process intensificat ...
Formaldehyde is an essential chemical substance made use of widely by manufacturers’ of building and construction materials and household/residence products. It’s also a by-product of coal combustion as well as specific other organic and natural processes. Formaldehyde is available in substantially large levels of concentrations either inside or outside. Formaldehyde vapors tend to be odorless unless of course in higher concentrations. (more…)
Using blankets the width of your wall studs, insert the blanket between the studs and staple to the studs. (The job is easier i ...
It is easier and less costly to fit insulation in a new home than to retrofit. However, many existing houses have little or no insu ...
You know where to insulate, but there’s still one more thing you need to know about—vapor barriers. Well-insulated attics, craw ...
You must perform some sort of tour and visit of your home and property to find out exactly where it may need in applying insulation ...
Many home owners want to use brick veneer exterior walls for their houses. The brick is usually the automatic choice for outd ...
You must perform some sort of tour and visit of your home and property to find out exactly where it may need in applying insulation. A good rule of thumb is that most heated area or perhaps cooled places needs to be split up from unconditioned places using insulation materials. Regardless of your properties design, you can use this rule to ascertain exactly where insulation installation should be set up. Every location will have its consideration in terms of insulation simplicity and cost-effectiveness and may be examined on the basis of both. (more…)
If your house has no attic (most flat-roof houses don’t), chances are there’s a cockloft, a space between roof and ceiling, at ...
Imprinted on every batt or blanket of insulation or on every bag of loose insulation is its R-Value. The higher Insulation R-Value, ...
You know where to insulate, but there’s still one more thing you need to know about—vapor barriers. Well-insulated attics, craw ...
Using blankets the width of your wall studs, insert the blanket between the studs and staple to the studs. (The job is easier i ...
It is easier and less costly to fit insulation in a new home than to retrofit. However, many existing houses have little or no insu ...
There are many efforts to make building more comfortable and to reduce the carbon dioxide emissions from buildings. For many years we tried to increase wall thickness of the wall insulation and roof insulation and adding the bottom insulation.
This seems logical, but I recently attended a seminar in where a speaker tried to make a comparison of as opposed to two major areas of new construction. These building were build year apart and built insulation levels in the store later far exceeded the first branch. Although the shops were of similar size, has a similar level of glass and skylights, the shop recently built, although it improved R-values (please refer to insulation R-Value chart), 43% costs warmer than the last. (more…)
It is easier and less costly to fit insulation in a new home than to retrofit. However, many existing houses have little or no insu ...
Imprinted on every batt or blanket of insulation or on every bag of loose insulation is its R-Value. The higher Insulation R-Value, ...
You must perform some sort of tour and visit of your home and property to find out exactly where it may need in applying insulation ...
If your house has no attic (most flat-roof houses don’t), chances are there’s a cockloft, a space between roof and ceiling, at ...
You know where to insulate, but there’s still one more thing you need to know about—vapor barriers. Well-insulated attics, craw ...
It is easier and less costly to fit insulation in a new home than to retrofit. However, many existing houses have little or no insulation, and they will benefit from any improvements that can be made to the levels of insulation. In most houses, insulation can be reasonably easily added to roof spaces and under timber framed floors. It is more difficult to retrofit insulation to walls. It is advisable to add insulation during any renovation, and it can also be cost effective – especially in colder parts of the country – to remove internal linings in order to add wall insulation. (more…)
You must perform some sort of tour and visit of your home and property to find out exactly where it may need in applying insulation ...
Imprinted on every batt or blanket of insulation or on every bag of loose insulation is its R-Value. The higher Insulation R-Value, ...
If your house has no attic (most flat-roof houses don’t), chances are there’s a cockloft, a space between roof and ceiling, at ...
You know where to insulate, but there’s still one more thing you need to know about—vapor barriers. Well-insulated attics, craw ...
There are many efforts to make building more comfortable and to reduce the carbon dioxide emissions from buildings. For many years ...
If your house has no attic (most flat-roof houses don’t), chances are there’s a cockloft, a space between roof and ceiling, at the top floor level. Cocklofts can—and should—be insulated. How do you know if your cockloft has enough insulation? Inspect it. Some cocklofts have hatches that are easily removed. If yours doesn’t, remove a ceiling light fixture and check around the edges for insulation. Or, in a closet, poke a hole in the ceiling material and check. (Cocklofts are difficult to insulate. A skilled and reputable professional should do that. (more…)
Using blankets the width of your wall studs, insert the blanket between the studs and staple to the studs. (The job is easier i ...
Many home owners want to use brick veneer exterior walls for their houses. The brick is usually the automatic choice for outd ...
You may have unfinished masonry walls in your basement. To insulate them, you’ve first got to create wall studs to hold the ins ...
Imprinted on every batt or blanket of insulation or on every bag of loose insulation is its R-Value. The higher Insulation R-Value, ...
You know where to insulate, but there’s still one more thing you need to know about—vapor barriers. Well-insulated attics, craw ...