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Yahoo , Facebook , Facebook , Twitter , Twitter , Google+ , Google+ , Myspace , Myspace , Linkedin , Linkedin , Odnoklassniki , Odnoklassniki , Vkontakte , Vkontakte , Google , Google , Yahoo , Yahoo , Rambler , Rambler , Yandex , Yandex , Gmail , Gmail , Yahoo! Designers Manufacturers , ??????? ????????? - ?????????? ???????????? , Gorgian Wikipedia - Free Encyclopedia , ????????? ?????? ????????? , Cambridje Dictionary Online , ????????? ???????? ????????? ?????? ????????? , Oxford Advenced Learner's Online Dictionar? , ??????????? ?????? - moazrovne,net, ??? I remember when all the fuss about green energy started the wind generators were an obvious solution. During the compression cycle, the refrigerant passes through four major components within the chiller: the evaporator, the compressor, the condenser, and a flow-metering device such as an expansion valve. Mechanical compression chillers are classified by compressor type: reciprocating, rotary screw, centrifugal and frictionless centrifugal.
Reciprocating: Similar to a car engine with multiple pistons, a crankshaft is turned by an electric motor, the pistons compress the gas, heating it in the process. Rotary Screw: The screw or helical compressor has two mating helically grooved rotors in a stationary housing. Centrifugal: The centrifugal compressor operates much like a centrifugal water pump, with an impeller compressing the refrigerant. Frictionless Centrifugal: This highly energy-efficient design employs magnetic bearing technology.
Absorption chillers use a heat source such as natural gas or district steam to create a refrigeration cycle that does not use mechanical compression. Chillers produce chilled water in the evaporator where cold refrigerant flows over the evaporator tube bundle. The chilled water passes through coils in the air-handler to remove heat from the air used to condition spaces throughout the building.
Vaporized refrigerant leaves the evaporator and travels to the compressor where it is mechanically compressed, and changed into a high-pressure, high-temperature vapor. Inside the condenser, hot refrigerant flows around the tubes containing the condenser-loop water. The EPA has enacted regulations regarding the use and handling of refrigerants to comply with the Clean Air Act of 1990. Operate multiple chillers for peak efficiency: Plants with two or more chillers can save energy by matching the building loads to the most efficient combination of one or more chillers. Raise chilled-water temperature: An increase in the temperature of the chilled water supplied to the building's air handlers will improve its efficiency.
Reduce condenser water temperature: Reducing the temperature of the water returning from the cooling tower to the chiller condenser by 2-3°F will reduce chiller energy use 2-3%. Purge air from refrigerant: Air trapped in the refrigerant loop increases pressure at the compressor discharge.
Optimize free cooling: If your system has a chiller bypass and heat exchanger, known as a water-side economizer, it should be used to serve process loads during the winter season. Verify Performance of hot-gas bypass and unloader: These are most commonly found on reciprocating compressors to control capacity. Maintain refrigerant level: To maintain a chiller's efficiency, check the refrigerant sight-glass and the superheat and subcooling temperature readings, and compare them to the manufacturer's requirements. Compared to a major chiller failure, a sound preventive and predictive maintenance program is a minor cost. To effective maintain chillers, you must 1) bring the chiller to peak efficiency, and 2) maintain that peak efficiency. Checking water treatment: Checking the water treatment of the condenser-water open loop weekly will reduce the frequency of condenser tube cleaning and the possibility of a tube failure.
Checking the water treatment of the chilled-water closed loop monthly will reduce the frequency of evaporator tube cleaning and the possibility of a tube failure. Inspecting and cleaning tubes: The tubes in the evaporator and condenser bundles should be inspected once a year, typically when the chiller is taken offline for winterizing.
Indicated when pressure drop across the barrel (tube bundle) exceeds manufacturer's recommendations, but at least annually. Singer Taylor Swift seen stepping out from her apartment wearing a mini skirt and no bra in New York City, New York on August 8, 2016. Unlike all other engines manufactured primarily for lawn and garden applications, Generac OHVI engines are made specifically for generators.

I bought this one in August 2009 to replace my Generac 5500XL that had problems getting my well pump running. Either of these generators will easily power a typical home during a prolonged power outage. Basic engine repairs, maintenance, tune-ups, and oil and filter changes are also available.
I may be interested in purchasing broken and unwanted generators or other equipment for parts or repair. You may not cover your entire power demand with a few panels, but this is actually the most common solution for green energy at home.
A preventive and predictive maintenance program is the best protection for this valuable asset. The evaporator is the low-temperature (cooling) side of the system and the condenser is the high-temperature (heat-rejection) side of the system. As the helical rotors rotate, the gas is compressed by direct volume reduction between the two rotors. The compressor requires no lubricant and has a variable-speed DC motor with direct-drive for the centrifugal compressor.
The refrigerant evaporates (changes into vapor) as the heat is transferred from the water to the refrigerant.
The warm water (warmed by the heat transferred from the building ventilation air) returns to the evaporator and the cycle starts over. Each type of refrigerant used in a chiller compressor has specific safety requirements for leak detection and emergency ventilation. All personnel working with refrigerants covered by this act must be appropriately licensed. The temperature setpoint for the water leaving the cooling tower should be as low as the chiller manufacturer will allow for water entering the condenser. Taken together, these readings serve as a valuable baseline reference for operating the system and troubleshooting problems. Implementing a best-practice maintenance plan will save money over the life of the chiller and ensure longer chiller life.
There are some basic steps that facilities professionals can take to make sure their chillers are being maintained properly. The evaporator and condenser tube bundles collect mineral and sludge deposits from the water.
Alternately, for systems that operate all year to meet process loads, tube scaling and fouling can be monitored by logging pressure drop across the condenser and evaporator bundles.
They are engineered to run for the long periods of time required during a severe power outage or on a job site, utilizing the same type of pressurized oil lubrication used to give automobile engines long and trouble-free lives.
They also provide cooling for process loads such as file-server rooms and large medical imaging equipment. The pistons have intake and exhaust valves that can be opened on demand to allow the piston to idle, which reduces the chiller capacity as the demand for chilled water is reduced. Capacity is controlled by a sliding inlet valve or variable-speed drive (VSD) on the motor.
They can be equipped with both inlet vanes and variable-speed drives to regulate control chilled water capacity control. The chilled water is then pumped, via the chilled-water distribution system to the building's air-handling units. The condenser water is pumped from the condenser bundle to the cooling tower where heat is transferred from the water to the atmosphere.
Once through the valve, the refrigerant expands to a lower pressure and a much lower temperature.
If the equipment malfunctions, the safety control shuts the chiller down to prevent serious damage to the machine.
A reset schedule can typically adjust the chilled-water temperature as the outside-air temperature changes. Condenser water circulates through the cooling tower to reject heat, and then goes to a heat exchanger (bypassing the chiller) where the water is cooled sufficiently to meet the cooling loads.

Many newer chillers automatically save logs of these measurements in their on-board control system, which may be able to communicate directly with the DDC. Many chiller manufacturers offer training for building operating engineers in operating and maintaining their chillers.
An increase in pressure from the inlet to the outlet of 3-4 PSI indicates a probable increase in scale or fouling requiring tube cleaning. If an air-purge device is not installed, bubbles in the refrigerant sight-glass may also indicate refrigerant leak.
Generac OHVI engines have a significantly longer life than competitive engines – an unprecedented three to four times longer – making them the best investment on the market. Back in the day people used to actually sell energy from the solar panels and used as much as they could.
As with other types of air conditioning systems, most chillers extract heat from water by mechanically compressing a refrigerant. This unloading allows a single compressor to provide a range of capacities to better match the system load. It flows around the evaporator tubes, absorbing the heat of the chilled water that's been returned from the air handlers, completing the refrigeration cycle. On a centrifugal chiller, increasing the temperature of chilled water supply by 2-3°F will reduce chiller energy use 3-5%. Daily or weekly tracking of run time will show if a leak has developed that permits air to enter the system. Scale buildup also insulates the tubes in the heat exchanger reducing the efficiency of the chiller. Today we are going to talk about what are our options so far for a new way of power supply and how to maintain them. However to unlock to power of a wind turbine you need to be located somewhere without no obstacles around you.
This is more efficient than using a hot-gas bypass to provide the same capacity variation with all pistons working. To better monitor chiller performance, the chiller control system should communicate with the facility's direct digital control (DDC). So the best way for you to maximize the benefits of your solar panel system now is to carefully calculate your daily demand of energy. Some units use both methods, unloading pistons to a minimum number, then using hot-gas bypass to further reduce capacity stably. After that you can make your plans on how many panels you need, so you could produce as close as possible to what you need.
You have your solar energy, you have your wind energy and you can find wind and sunlight everywhere, but running FREE water…I doubt it. You can add batteries to your system and store energy produced through the day for the evening hours, but those batteries are expensive and you always have to keep a look out for them.
On top of that you have to keep your solar panels clean, so you could obtain the full potential of your panels. Birds are no longer welcome around your house, if they were, ever… And now you have to climb on your roof at least twice per month to check for some cracks or other damage. In Australia this is the main green energy supply, but I think that solar power is more comfortable for use at home.
To minimize your initial dive with money, check for some combo deals and know that solar panels are rated in three tiers. And if you live in an apartment building… well good luck installing a wind turbine near by. You can turn it into a part of your decoration, a waterfall with a water wheel that is making your pump and garden light run… Sounds too good to be true, but actually it is not impossible. And you are looking for a Tier 1 panel : Bosch, Suntech, Trina, Schott, Canadian Solar, Sunpower, Renesola, JA Solar, Panasonic, REC and more.

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