• 설비공학논문집
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• 제17권5호
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• pp.496-504
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• 2005

Heat recovery ventilators (HRV) are developed in order to satisfy both energy conservation and the improvement of indoor air quality as an alternative for current natural ventilation systems and local mechanical ventilation systems in kitchens and bathrooms. However, the performance of HRV system and the consequent effect on heating and cooling energy saving have not been sufficiently validated quantitatively in case of the application of HRVs in real residences. In this study, field measurement and computer simulation were conducted in both summer and winter period to assess the performance and validate energy conservation effect of HRVs. Under the Korea weather condition, average total heat recovery efficiency was $27\%$ in summer and $46\%$ in winter. According to the field measurement, HRV system can save the energy by $10\%$ in summer and 15$\%$ in winter. Furthermore, according to the simulation assessment, HRV system can save the energy by $17\%$ in summer and $17\%$ in winter.

• Journal of Advanced Marine Engineering and Technology
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• 제40권6호
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• pp.468-475
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• 2016

본 연구에서는 기존 열회수형 환기장치의 음향 문제점을 파악하고, 흡음덕트 설치위치별 열회수형 환기장치의 소음저감 방안을 강구하기 위하여 관련된 국내 외 규격을 기준으로 열회수형 환기장치의 크기, 풍량 및 흡음덕트 길이를 파라미터로 한 발생소음을 측정하여 비교하고 고찰하였다. 그 결과, 무향실에서 열회수형 환기장치에 대한 소음은 흡음덕트를 설치하지 않았을 경우에 소형 및 중형 모두 풍량에 관계없이 거의 대부분 소음기준인 50 dB(A) 보다 높게 나타났고, 흡음덕트를 설치하였을 경우에는 소음도가 감소됨을 알았다. 또한, 흡음덕트의 길이에 따른 주파수 대역별 음압수준은 소형과 중형 열회수형 환기장치에서 흡음덕트의 길이가 클수록 대체적으로 감소하였고, 풍량이 클수록 대체적으로 음압수준이 증가하였다.

• 설비공학논문집
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• 제29권2호
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• pp.68-73
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• 2017

Recently, energy recovery ventilators (ERVs) have been installed for energy saving in many multi-residential buildings in Korea. The performance of the heat exchanger of an ERV is analyzed in this study under specific indoor and outdoor conditions in a test-cell measurement. However, the performance of the heat exchanger varies according to the indoor and outdoor condition. In this study, the performance of energy recovery of the ventilation system was therefore analyzed in actual weather conditions using field measurement. Experiments were conducted under winter conditions in a multi-residential building for 20 days. Based on the measurement results, the characteristics of sensible heat and latent heat exchange rates were analyzed.

• 설비공학논문집
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• 제20권1호
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• pp.26-34
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• 2008

Heat recovery ventilator(HRV) is recommended to improve indoor air quarlity (IAQ) and energy conservation in apartment houses. Recently, in Korea, HRV is produced from many manufacturers. However, there have been not so many experiences to apply HRV in apartment houses and verification on the performance such as heat exchange efficiency, carry-over rate, internal leakage, etc. have not been carried out sufficiently. So in this study, fan performance, heat exchange efficiency, air leakage, internal exhaust leakage, external leakage and sound level of HRV were examined for selected HRV models under domestic and international standard. Results of performance test, there were need to improve latent heat exchange efficiency and sound level of HRV.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2006년도 하계학술발표대회 논문집
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• pp.417-422
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• 2006

On trends of 'well-being', heat recovery ventilators(HRV) are recently installed in high rise buildings. HRV is not energy saving instrument but ventilating one. But many people have not been aware of the accurate fact. In this study, performances of HRV are tested under foreign and domestic standards. Especially air-tightness is measured three times by using gas concentration method and pressing equipment. Wet effective ventilating air volume is acquired by solving gas concentration equations. After research air-tightness and effective ventilating air volume must be more focused on than heat transfer efficiency to select the optimal HRV. Heat transfer efficiency must be adjusted by air-tightness results.

• 설비공학논문집
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• 제28권6호
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• pp.232-241
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• 2016

Installing a ventilator for an apartment house composed of over 100 dwelling units was mandated in 2006 to improve indoor air quality. In the case of mechanical ventilators, the air change rate is kept stable, however 68% of dwellers do not operate their ventilator because of an increased electrical bill and noise. In the case of natural ventilators, the former problems are settled, but there are concerns about cold draught and an increase of heating/cooling cost. Authors are developing a heat recovery type natural ventilator which is a natural ventilator equipped with total heat recovery element, and it is expected that those problems of mechanical ventilator and natural ventilator are resolved by this. The combined type diffuser of this study is an under developed fit to the heat recovery type natural ventilator above. There are no standards to evaluate the performance for this type of diffuser. Due to this issue this study investigated the performance of the ventilation and maintained a thermal environment for the combined type diffuser by comparing it with existing diffusers. The results revealed that the performances of the combined type of diffusers showed different features from the existing ones, and was estimated to be high enough in the performances above.

• 설비공학논문집
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• 제23권3호
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• pp.201-207
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• 2011

Total heat recovery type ventilators that are connected to each room with ducts are mainly installed in Korea, but they raise concern over duct pollution. In this study, indoor environments made by thin line type ventilators installed in dwelling units of apartment houses are investigated by CFD. Results show the case that thin line type ventilators installed in each room-including kitchens-make the best indoor environment that maintains air velocity at under 0.25m/s, and evenly distributes the age of air in all areas.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2006년도 동계학술발표대회 논문집
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• pp.26-26
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• 2006

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2009년도 춘계학술대회 논문집
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• pp.310-311
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• 2009

• 한국산학기술학회논문지
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• 제19권5호
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• pp.593-598
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• 2018

본 연구는 혹한기 결빙 방지를 위한 열회수형 환기장치의 개발에 관한 연구로써, 개발에 필요한 내부 리턴 댐퍼를 최적화하여 적용하기 위하여 전산유체해석(Computational Fluid Dynamics)을 수행하였고 이를 바탕으로 실험을 위한 시제품을 만들어 혹한기 결로 및 결빙실험을 수행하였다. 배기 재순환 비율이 최대가 되는 최적의 내부 리턴 댐퍼를 설계하기 위하여 총 16 model의 전산유체해석을 수행하였다. 전산유체해석 결과 외기에 대한 배기 재순환 비율은 59.9% ~ 62.3%로 나타났다. 외기온도(Outdoor Air Temperature)가 $-15^{\circ}C$ 이상에서는 배기 재순환 운전과 통상 운전 모두 결로와 결빙이 발생하지 않았다. 그러나 외기온도가 $-20^{\circ}C$에서는 내부 리턴 댐퍼를 $45^{\circ}$ 열어 배기 재순환 운전을 하여야 결로와 결빙이 발생하지 않았다. 혹한기 결빙 방지를 위한 열회수형 환기장치는 외기온도에 따라 통상 운전 모드와 배기 재순환 운전 모드의 두 가지 운전모드로 운전하여야 한다. 외기온도가 $-15^{\circ}C$보다 높을 경우에는 통상 운전 모드로 작동하고 외기온도가 $-15^{\circ}C$보다 낮을 경우에는 재순환 운전 모드로 작동하는 열회수형 환기장치의 운전 알고리즘을 개발하여 적용하였다.