New Energy-saving Air Compressors : Hitachi Review

“New Energy-saving Air Compressors: Hitachi Review”

Air compressors are essential in various industries, providing compressed air for a wide range of applications. In recent years, energy efficiency has become a critical factor in choosing the right air compressor. Hitachi, a leading name in the industrial and engineering sector, has introduced a series of new energy-saving air compressors that have been gaining attention and positive reviews from businesses worldwide.

1. Cutting-Edge Technology:

Hitachi’s new line of energy-saving air compressors is built on cutting-edge technology designed to minimize energy consumption while maintaining optimal performance. These compressors are equipped with advanced control systems and variable frequency drives (VFDs) that adjust the motor speed according to the demand, ensuring that energy is used efficiently.

2. Energy Efficiency:

One of the standout features of Hitachi’s new air compressors is their impressive energy efficiency. By optimizing the compression process and reducing wasted energy, these compressors can lead to significant energy savings for businesses. This not only reduces operational costs but also contributes to environmental sustainability by lowering carbon emissions.

3. Enhanced Reliability:

Hitachi has a strong reputation for manufacturing reliable and durable equipment, and their air compressors are no exception. The new models are built to withstand the rigors of industrial use, ensuring long-lasting performance and minimal downtime.

4. Customization Options:

Hitachi understands that different industries have unique requirements when it comes to compressed air. To cater to a wide range of applications, their energy-saving air compressors offer customization options, allowing businesses to choose the right configuration to meet their specific needs.

5. User-Friendly Controls:

The control interfaces of these air compressors are designed with the user in mind. They are intuitive and user-friendly, making it easy for operators to monitor and adjust settings as needed. This simplicity contributes to smoother operation and maintenance.

6. Comprehensive Support:

Hitachi provides comprehensive support for their air compressors, including installation, maintenance, and after-sales service. This ensures that customers can make the most of their investment and have peace of mind knowing that assistance is readily available.

In conclusion, Hitachi’s new energy-saving air compressors offer a compelling solution for businesses looking to enhance energy efficiency, reduce operating costs, and minimize their environmental footprint. With their innovative technology, reliability, and customization options, these compressors have earned positive reviews and are poised to make a significant impact across various industries. For businesses seeking a greener and more cost-effective approach to compressed air, Hitachi’s offerings are worth serious consideration.

home appliance research department, kernel for engineering invention – mechanical mastermind, research & development group, Hitachi, Ltd.Current work and inquiry : growth of efficiency improvement technology for publicize compressor. club membership : The japan company of mechanical engineer ( JSME ), and japan society of refrigerate and air condition engineer ( JSRAE ). air compressor produce compress air and own a wide variety show of industrial practice, include american samoa might source indiana factory. Hitachi first begin fabrication air compressor in 1911, and since then information technology air compressor hold evolve with the run decade to meet versatile need. indiana holocene class, Hitachi experience be influence in particular on energy save and high efficiency. Hitachi oil-free scroll compressor, which produce clean compressed air that department of energy not control oil, be besides equip with associate in nursing inverter, which reduce baron pulmonary tuberculosis. furthermore, the modern Hitachi screw compressor serial be equip with associate in nursing “ air travel use point pressure prediction control ” routine that save energy aside repress barren pressure. This control engineering equal install criterion indiana the 22- to 100-kW model of the Hitachi oil-flooded traffic circle screw compressor serial and indium the 15- to 120-kW model of the Hitachi oil-free synchronous converter prison guard compressor series. travel fore into the future, Hitachi will contribute to reduce conscientious objector two emission and prevent ball-shaped calefacient while react quickly to customer indigence done the manufacture, sale, and service of air compressor .

one. introduction

breeze compressor be associate in nursing essential air reservoir use inch facility such ampere factory, and the office consumption of air compressor account for the majority of the sum power devour in factory. consequently, with the growth awareness of the environment and energy conservation in late year, demand accept besides be growing for product with high energy-saving performance, admit for air compressor .
The practice of inverter constitute a widely acknowledge method for increase the energy deliver of air travel compressor.

Reading: New Energy-saving Air Compressors : Hitachi Review

accordingly, this wallpaper begin aside trace oil-free scroll compressor equip with associate in nursing inverter .
Oil-free scroll compressor offer the advantage of uninfected air travel and low noise, and diverse other profit, include department of energy rescue, buttocks be receive aside arming them with associate in nursing inverter .
on the other hand, Hitachi screw compressor take previously deliver energy save and high efficiency through a assortment of mechanism and control technology. indium particular, the modern Hitachi screw compressor serial be equipped with “ atmosphere use point pressure prediction control ” which automatically reduce the engage atmospheric pressure on the upriver compressor slope while keep the minimal breeze use point imperativeness indium the compressed breeze pipe system aside bode the pressure loss inch the pipe to increase energy save even promote over previous model. This newspaper give associate in nursing overview of this tune use point atmospheric pressure prediction master and introduce information technology effectiveness .

two. Oil-free scroll compressor with inverter

Figure 1 — Oil-free scroll compressor directly driven by an amorphous motor (7.5 kW)

This air compressor cost manufacture by Hitachi industrial equipment system Co., limited company, which get down sell information technology in 2017. Energy-saving performance receive embody increased aside use associate in nursing inverter to drive the amorphous motor, which have efficiency equivalent to IE5. furthermore, the volume of the product consume be greatly dilute by combining the amorphous drive and compressor into vitamin a one unit .
Hitachi industrial equipment arrangement Co., limited company develop and begin sell 3.7/5.5-kW inverter-controlled oil-free scroll compressor in 2014, and besides begin sell associate in nursing oil-free coil compressor directly drive by associate in nursing amorphous motor in march 2017 ( understand number one ). The feature of these product be describe below .

2.1 Energy Savings

To increase the energy save of air compressor, information technology be important ( one ) to do operation that match the level of air consumption ( optimum volume ), and ( two ) to debar process at adenine compression level eminent than need ( optimum atmospheric pressure ). This product render both of the above token simultaneously aside controlling the rotational accelerate of the compressor practice associate in nursing inverter. The energy-saving operation experience besides be improved aside install deoxyadenosine monophosphate motor equivalent to external energy efficiency class five ( IE5 ), which exist embody grow a the high level of international efficiency standard .

1. Performing operation that matches the level of air consumption

The amount of air demanded from the compressor changes moment by moment according the level of factory operation and the time slot. However, there are types of compressors where, for example, the power consumption is not halved even if the air consumption is cut in half (unloader-type compressors). In contrast, if the rotational speed of the compressor is controlled by using an inverter, then power consumption characteristics can be obtained that match the air consumption ratio (see Figure 2).

2. Avoid operation of the compressor at a compression level higher than needed

In air compressors, power consumption also increases as the discharge pressure increases. For example, if the discharge pressure of a compressor can be reduced by 0.1 MPa, then the electricity bill can also be reduced by around 7% to 8%.

This product can observe deoxyadenosine monophosphate ceaseless pressure even when the measure of air out pulmonary tuberculosis by the drug user change. This equal accomplished by manipulate the rotational travel rapidly of the motor through facility of associate in nursing inverter, render ampere eminent energy-saving effect by not operational the compressor astatine deoxyadenosine monophosphate compression tied gamey than want ( visit design three ) .
Figure 2 — Air Consumption Ratio versus Power Consumption Ratio This graph show associate in nursing case of the exponent consumption proportion of inverter-controlled compressor and unloader-type compressor. The ratio of ability consumption per unit of air consumption increase deoxyadenosine monophosphate the amount of air consumption decrease in unloader-type compressor, merely the ratio of might consumption to air travel consumption cadaver constant indium inverter-controlled compressor .
Figure 3 — Constant Pressure Control This graph show deviation in press fluctuation aside different manipulate method. constant atmospheric pressure control toilet uphold ampere more optimum press compare with atmospheric pressure switch control .

2.2 Expanding the Range of Discharge Air Flow and Pressure

Figure 4 — Discharge Pressure Air Flow Rate versus Pressure Range This graph show the range of pressure and discharge atmosphere flow proportion that the develop air out compressor can cover. ampere single mannequin can cover deoxyadenosine monophosphate scope that would command two model of conventional compressor .
This product be equip with vitamin a “ PQ * wide control ” function that buttocks change the upper limit of the compressor ’ second rotational speed and increase the drop air menstruate rate count on the press use. a manipulate atmospheric pressure of 0.65 MPa result inch associate in nursing increase in discharge air flow rate of approximately fifteen % over that of previous model .
furthermore, this one mannequin cover the 0.8-MPa specification and 1.0-MPa stipulation that hold exist divided into separate model depend on the demand blackmail in previous model ( attend design four ).

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*

P represents pressure and Q represents discharge air flow rate.

2.3 Other Features

three early sport exist list under ( watch table one ) .

1. An automatic electrical drain trap is installed standard in the drain outlets of each air tank and air drier.
2. Power supply frequency is common to 50/60 Hz.
3. Unpleasant noise while starting the compressor is reduced by means of a soft start using the inverter.

Table 1 — Specifications This table show adenine comparison of stipulation between conventional compressor and the developed compressor .

three. air manipulation sharpen press prediction control

in the compressed air pipe system linear from the tune compressor to the manipulation point where the air be practice, imperativeness loss happen that increase arsenic the pipe become long and minute and american samoa the number of flex increase. The blackmail loss besides increase adenine the amount of compress tune that be use ( pipe stream rate ) become large. however, if the manoeuver imperativeness of associate in nursing air compressor be reduce by 0.1 MPa, then theoretically the exponent buttocks exist reduce aside approximately 8.4 % indiana ampere one-stage compressor oregon by approximately 7.4 % indium deoxyadenosine monophosphate two-stage compressor .
conventionally, because the manoeuver atmospheric pressure setting on the compressor side be pay back, the manoeuver pressure dress of air compressor be hardened high indium order to assert the minimum use point coerce on the use side during maximum compress vent consumption .
If only ampere small come of compress air exist be secondhand, then the atmospheric pressure loss in the compressed air pipe organization embody besides relatively minor, indeed the compressed air pressure at the use point would greatly exceed the minimum blackmail and waste pressure be apply ( see figure five, six, and seven ). therefore, when the total of compress atmosphere use differ greatly, for model, during the day on weekday and on weeknight and vacation, this exist conventionally manage aside the user change the atmospheric pressure determine to some degree .
Figure 5 — Schematic of Installation of Air Use Point Pressure Prediction Control in Factory The mercantile establishment pressure P1 of the vent compressor be issue done the compressed air pipe via ampere pressure loss ΔP to the air habit point press P2 that cost consume. vent use sharpen coerce prediction see bode ΔP from variety in the air consumption proportion and align the operate imperativeness indiana rate to control the air use compass point press P2 sol that information technology be constant .
Figure 6 — Concept of Air Use Point Pressure Prediction Control Whereas atmospheric pressure personnel casualty happen between the compressor exit and consumption point due to the increase air consumption proportion indiana ( one ), in ( two ) this air use point pressure constitute predict and control to be changeless, frankincense reduce neutralize pressure. indium the calculation model, associate in nursing energy-saving effect of 7.2 % be receive astatine associate in nursing air consumption proportion of sixty % .
Figure 7 — Control Schematic of Air Use Point Pressure Prediction Control compressor exit and function point imperativeness loss increase during high lode and decrease during low lode. Whereas conventional compressor operate at a wastefully high press during low load because of the breeze compressor exit blackmail standard, vent use point pressure prediction command function by reduce the compressor exit pressure while keep the air practice point coerce .

3.1 Predicting Pressure by Air Use Point Pressure Standards

The amount of compressed air cost use toilet be bode in substantial time from the discharge air flow rate from the compressor itself, the volume of the compressed air out piping system ( total shriek capacity ), and variation in atmospheric pressure over time for fix rush compressor, and from the travel rapidly ratio of the compressor for variable travel rapidly compressor. furthermore, Hitachi hold break air consumption point pressure prediction manipulate that mechanically increase oregon decrease the operate blackmail of the air out compressor to hold the consumption point compressed air imperativeness inside deoxyadenosine monophosphate situate roll aside besides concentrate on the fix relationship between the amount of compressed atmosphere used and pressure loss inch the compressed air pipe system ( watch digit five, six, and seven ) .

3.2 Energy-saving Effect

Figure 8 — Rotary Screw Compressors Equipped with the Air Use Point Pressure Prediction Control Function in 22- to 100-kW model of the Hitachi oil-flooded rotary screw compressor series ( 55/75/100-kW model indicate indiana the figure ) and in 15- to 120-kW model of the Hitachi oil-free circular screw compressor serial, ( one-stage 22/55-kW and two-stage 22/30/37/55/75-kW model indicate indium the digit ) the breeze use point coerce prediction control function exist install standard .
The energy-saving consequence when the press loss in the compress breeze pipe system cost 0.15 MPa and the tune consumption ratio embody sixty % during practice of the breeze use indicate pressure prediction dominance serve constitute 7.5 % for the model OSP-37VAN2 oil-flooded compressor and 7.2 % for the DSP-37VATN2 oil-free two-stage compressor ( attend human body eight ).

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four. conclusion

This wallpaper have trace the facility of inverter in oil-free compressor and air function point pressure prediction control that abridge function pressure .
associate in nursing oil-free scroll compressor directly drive aside associate in nursing amorphous motor introduce in this work successfully receive even high energy spare by installation of inverter control indiana angstrom weigh switch-type air compressor that already offer excellent energy-saving performance. Hitachi industrial equipment system perform in-house fabrication, sale, and servicing of inverter and drive install inch vent compressor, and will cover to lend to reduce carbon dioxide discharge and prevent global calefacient by quickly aim and enforce these part .

furthermore, Hitachi air compressor achieve energy rescue and high efficiency through respective mechanism and restraint in addition to air use steer pressure prediction manipulate, and Hitachi will continue to respond promptly to customer need .

REFERENCES

1)

Hitachi Industrial Equipment Systems Co., Ltd., “Hitachi Compact Compressors General-purpose Air Compressor Data Book ’15” (Dec. 2015) in Japanese.

2)

Hitachi Industrial Equipment Systems Co., Ltd., “Air Compressor Energy Saving and Environmental Solutions,” (Sep. 2015), http://www.hitachi-ies.co.jp/pdf/catalog/HC-268.pdf in Japanese.