Four basic processes
On the psychrometric chart, ventilation air moves along predictable lines:
- Heating: horizontal line to the right (dry-bulb up, moisture constant).
- Sensible cooling: horizontal line to the left (dry-bulb down, moisture constant).
- Humidification: line upward (more moisture).
- Dehumidification: line downward (condensation, latent heat released).
Sensible recovery = a move along the constant-humidity line
A 플레이트 코어 pre-heats or pre-cools the supply along a constant-humidity path: dry-bulb temperature changes, moisture does not. It is the simplest, cleanest recovery for separated airstreams.
Total-energy recovery = a move toward the exhaust state
A rotary enthalpy wheel or membrane pulls the supply state toward the exhaust state in both temperature and humidity. In winter, cold dry outdoor air approaches the warmer, more humid exhaust – picking up sensible and latent energy and cutting both heating and humidification load.
Where frost enters the picture
When exhaust falls below its dew point and frost point, moisture deposits as ice on the core. This is why cold-climate designs need defrost strategy, not just a bigger wheel.
Frequently asked questions
Does recovery change indoor RH? Sensible-only recovery does not; total-energy recovery can steady indoor humidity because it transfers moisture too.
Which process saves more energy in summer? In humid summers, the dehumidification (downward) leg of total recovery relieves the cooling coil most.
Need help specifying the right air-to-air heat recovery for your project? Contact the QIYU engineering team – WhatsApp +86 157 5335 5505, or email kuns913@gmail.com.
자주 묻는 질문
How does a heat recovery process appear on the chart?
Sensible recovery moves a state horizontally (temperature change, same moisture); enthalpy recovery moves it along a line blending both temperature and moisture toward the supply state.
Why do cooling and recovery processes often combine on the chart?
Precooling the exhaust with incoming air lowers the wet-bulb the cooling coil must handle, shrinking coil load and sometimes letting a smaller coil meet the setpoint.
자주 묻는 질문
How does a heat recovery process appear on the chart?
Sensible recovery moves a state horizontally (temperature change, same moisture); enthalpy recovery moves it along a line blending both temperature and moisture toward the supply state.
Why do cooling and recovery processes often combine on the chart?
Precooling the exhaust with incoming air lowers the wet-bulb the cooling coil must handle, shrinking coil load and sometimes letting a smaller coil meet the setpoint.
적합한 열교환기 선정
당사 엔지니어가 풍량, 온도, 압력 손실 예산에 맞춰 코어를 설계하고, 적용에 따라 판형·회전식·히트파이프 회수를 선택합니다. 다음을 읽으세요: 열교환기 가이드 , 또는 사양 관련 문의를 주세요.
관련 제품
HVAC 및 환기용 판형·회전식·히트파이프 회수.
공기 및 액체용 대면적 고정 코어.
대풍량용 고효율 에너지 회수.
청정 적용을 위한 수동적·완전 분리 유동.