Table of Contents
What is a water side economizer?
WaterFurnace waterside economizer option allows the use of a building’s interior loop water to provide “free” cooling. It works by passing air through a coil cooled by loop water rather than through a coil cooled by mechanical refrigeration.
How does a economizer chiller work?
For data centers with water- or air-cooled chilled water plants, a water-side economizer uses the evaporative cooling capacity of a cooling tower to produce chilled water and can be used instead of the chiller during the winter months.
What is PDX unit?
PDX direct expansion cooling unit is equipped with the most advanced industry. technology, guaranteeing precise cooling of data centers and server rooms. It comes filled with R410A refrigerant which allows the unit to reach significant levels of efficiency.
How do economizers work?
Economizers reduce air conditioning costs by using outside air (OSA) for free cooling causing the compressor to run less. OSA dampers switch over to minimum OSA when free cooling is not available. Economizer dampers switch to minimum ventilation position when OSA conditions are not favorable for cooling.
How does an air side economizer work?
Air-side economizers use an outdoor-air damper and a return-air damper to meet the building cooling load when outdoor conditions are favorable. As Figure 1 shows, the return-air damper controls how much air is returned from the conditioned building spaces and cycled again through the building.
What is Liebert PDX?
The Liebert PDX offers unique, floor-level air discharge that reduces the mixing of hot and cold air to improve efficiency. Downflow models provide front, left side and right side discharge and upflow models provide front and rear return options.
What is economizer cycle?
An economizer is a part of a building’s cooling system that uses cool outdoor air to cool the building instead of operating the air conditioning compressor. An economizer is an add-on feature to an HVAC air handler that draws in outdoor air and mixes it with return air from indoors.
What is direct air-side economizer?
An air-side economizer (see Figure 1 below) brings cool air from outdoors into a building and distributes it to the servers. Instead of being re-circulated and cooled, the exhaust air from the servers is simply directed outside.
What is the main purpose of an economizer?
Economizers (US and Oxford spelling), or economisers (UK), are mechanical devices intended to reduce energy consumption, or to perform useful function such as preheating a fluid.
How does an economizer system work?
An economizer is a part of the outdoor system, most often mounted on the roof, of an HVAC system for commercial buildings. The economizer evaluates outside air temperature and even humidity levels. When the exterior air levels are appropriate, it uses the outside air to cool your building.
How does an economizer work on a boiler?
Economizers capture heat from the exhaust flue and return it to the boiler by heating the incoming feedwater. By heating the feedwater, the boiler does not have to expend as much fuel to turn the water into steam. Over the long term, fuel costs are the top expense involved in running a boiler.
How does a feed water economizer work?
A feedwater economizer reduces steam boiler fuel requirements by transferring heat from the flue gas to incoming feedwater. Boiler flue gases are often rejected to the stack at temperatures more than 100°F to 150°F higher than the temperature of the generated steam.
Which one of the following is the correct sequence of accessories in a boiler plant?
Explanation: The correct answer is mud hole (or sight hole). Feed pump, steam trap, steam separator are all boiler accessories whereas a mud hole is a boiler mounting. Boiler mounting increases the efficiency of the boiler. 3.
Which of the following is the correct sequence for heat transfer to water in a generator?
Economizer: Economizer heat feed water before it enters steam drum and evaporator. Evaporator: Convert water into saturated steam, then forwarded to superheater.
What is the Liebert econophase pumped refrigerant economizer?
The Liebert Econophase pumped refrigerant economizer works with the Liebert DSE cooling unit and Liebert MC Outdoor Condenser to significantly improve data center efficiency – without bringing in outside air and without using water.
What is a water-side economizer?
Figure 1: Diagram of typical waterside economizer. Water-side economizers offer cooling redundancy because they can provide chilled water in the event that a mechanical chiller goes offline. This can reduce the risk of data center down time.
What are the components of Liebert DSE?
The Liebert DSE direct expansion cooling system comprises four primary components: the Liebert DSE indoor computer room air conditioning (CRAC) unit, the Liebert MC micro-channel outdoor condenser, the Liebert EconoPhase pumped refrigerant economizer and Liebert iCOM control with thermal system manager.
What is the Liebert DSE direct expansion cooling system?
The Liebert DSE direct expansion cooling system comprises four primary components: the Liebert DSE indoor computer room air conditioning (CRAC) unit, the Liebert MC™ micro-channel outdoor condenser, the Liebert EconoPhase pumped refrigerant economizer, and Liebert iCOM™ thermal system controls.