Our solutions
산업용 공구 및 솔루션
Solutions
업계 지원
산업용 공구 및 솔루션
산업용 어셈블리
업계 지원
업계 지원
항공우주
업계 지원
항공우주
항공우주
항공우주
항공우주
제품
산업용 공구 및 솔루션
드릴 솔루션
볼팅 솔루션
어셈블리 공구 및 솔루션
에어 라인 부속품
제품
에어 라인 부속품
에어 라인 부속품
에어 라인 부속품
서비스
산업용 공구 및 솔루션
아틀라스콥코 서비스 솔루션
서비스
아틀라스콥코 서비스 솔루션
아틀라스콥코 서비스 솔루션
아틀라스콥코 서비스 솔루션
전문가 허브(Expert Hub)
산업용 공구 및 솔루션
전문가 허브(Expert Hub)
전문가 허브(Expert Hub)
전문가 허브(Expert Hub)
전문가 허브(Expert Hub)
전문가 허브(Expert Hub)
산업용 공구 및 솔루션
아트라스콥코 렌탈
Solutions
솔루션 적용 분야
아트라스콥코 렌탈
솔루션 적용 분야
솔루션 적용 분야
솔루션 적용 분야
솔루션 적용 분야
렌탈이 필요한 이유
아트라스콥코 렌탈
렌탈이 필요한 이유
렌탈이 필요한 이유
렌탈이 필요한 이유
아트라스콥코 렌탈
컴프레서
Solutions
제품
컴프레서
Condensate Treatment (응축수 처리) 솔루션 제품군
제품
Condensate Treatment (응축수 처리) 솔루션 제품군
Condensate Treatment (응축수 처리) 솔루션 제품군
Condensate Treatment (응축수 처리) 솔루션 제품군
Condensate Treatment (응축수 처리) 솔루션 제품군
공정 가스 및 에어 장비
서비스 및 부품
컴프레서
공기 압축기 부품
서비스 및 부품
공기 압축기 부품
공기 압축기 부품
공기 압축기 부품
공기 압축기 부품
서비스 플랜 (Service Plan)
서비스 및 부품
서비스 플랜 (Service Plan)
서비스 플랜 (Service Plan)
서비스 플랜 (Service Plan)
터보 기계류 관련 글로벌 애프터마켓 서비스
서비스 및 부품
터보 기계류 관련 글로벌 애프터마켓 서비스
터보 기계류 관련 글로벌 애프터마켓 서비스
효율성 극대화
서비스 및 부품
효율성 극대화
효율성 극대화

Dimensioning Compressor Installations at High Altitude

Compressors Dimensioning Compressed Air Wiki Compressor Installations

Both the ambient pressure and temperature decrease with altitude above sea level. This lower inlet pressure impacts the pressure ratio, for the compressors as well as for the connected equipment, which, in practice, signifies an impact on both power consumption and air consumption. At the same time, the changes due to higher altitude will also affect the available rated power from electric motors and from combustion engines.

How does altitude influence compressor installations?

Compressor at high altitude, on mountain

The way in which ambient conditions influence the end consumer application must also be taken into account. Is a specific mass flow rate (in a process) or a volume flow rate required? Was the pressure ratio, absolute pressure or gauge pressure used for dimensioning? Is the compressed air temperature significant? All of these considerations create different conditions for dimensioning a compressed air installation installed at a high altitude and can be fairly complex to calculate.

What effect does altitude have on the compressor choice?

To choose the correct compressor where the ambient conditions differ from those stated on the data sheet, the following factors should be taken into consideration:

- height above sea level or ambient pressure
- ambient temperature
- humidity
- coolant temperature
- type of compressor
- power source

These factors primarily affect the following:

- max. working pressure
- capacity
- power consumption
- cooling requirement

The most important factor is the inlet pressure variations at altitude. A compressor with a pressure ratio of 8.0 at sea level will have a pressure ratio of 11.1 at an altitude of 3000 meters (pro-vided that the application's operating pressure is unchanged). This affects the efficiency and, consequently, the power requirement. The amount of change is dependent on the type of compressor and the design. The ambient temperature, humidity and coolant temperature all interact and affect the compressor performance to different degrees on single-stage or multi-stage compressors, dynamic compressors or displacement compressors.

How does altitude affect electric motors?

how does height affect the electrical motor?

Cooling is impaired on electric motors by the lower density air at high altitudes. Standard motors should be able to work up to 1000 m and with an ambient temperature of 40°C without any impacts on rated data. At higher altitudes, the table below can be used as a guide for standard motor performance deration. Note that for some compressor types, the electric motor performance is impaired more than the compressor requisite shaft power at high altitude. Therefore, operating a standard compressor at high altitude requires lowering the working pressure or else fitting an oversized motor.

How does altitude affect internal combustion engines?

A reduction in ambient pressure, temperature increase or reduction in humidity reduces the oxygen content in the air used for combustion and, consequently, the extractable power from the internal combustion (IC) engine. The degree of shaft power deration depends on the type of engine and its breathing method (naturally aspirated or turbocharged) as set out in the table below. The humidity plays a smaller role (de-ration <1% per 1000 m) when the temperature falls below 30°C.

Note that the engine power falls more rapidly than the compressor requisite shaft power. This implies that for each compressor/engine combination, there is a maximum working height that will use the entire power margin of the engine over the compressor for use at sea level. Generally, suppliers should be entrusted with calculating and stating the specific data that applies to the compressor, engine and air consumption equipment in question. If anything is unclear or for any questions, the installer should always contact the equipment manufacturer.

Read more on the different aspects of dimensioning compressor installations below.

Related articles

how to install a compressor?

압축기 설치

과거에 비해 압축기 시스템 설치가 더 쉬워졌습니다. 설치 시 고려해야 하는 몇 가지 요소들 중 가장 중요한 것은 압축기 배치 위치와 압축기 주변 공간을 구성하는 방법입니다. 여기에서 자세히 알아보십시오.