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heat recovery ventilation : ウィキペディア英語版
heat recovery ventilation

Heat recovery ventilation (HRV), also known as mechanical ventilation heat recovery (MVHR), is an energy recovery ventilation system using equipment known as a heat recovery ventilator, heat exchanger, air exchanger, or air-to-air heat exchanger which employs a cross flow or counter-flow heat exchanger (countercurrent heat exchange) between the inbound and outbound air flow.〔''Most HRVs are balanced ventilators in which heat is transferred from one airstream to another. These balanced HRVs are often called air-to-air heat exchangers (AAHXs). Central-exhaust heat-pump water heaters are HRVs but they are not AAHXs because they transfer heat from one airstream into water, not between two airstreams. Another term often used is energy recovery ventilator (ERV). All HRVs transfer sensible heat from one airstream to another or to water. If latent heat is also transferred, then an HRV can be called an ERV. While there are specific differences between these different terms, many people use HRV, AAHX, and ERV interchangeably. '' The Healthy House Institute. Staff. "ERV". Understanding Ventilation: How to Design, Select, and Install Residential Ventilation Systems. June 4, 2009. December 9, 2009. 〕 HRV provides fresh air and improved climate control, while also saving energy by reducing heating (and cooling) requirements for many applications including vehicles.〔D. Denkenberger, M. Parisi, J.M. Pearce. (Towards Low-Cost Microchannel Heat Exchangers: Vehicle Heat Recovery Ventilator Prototype ). ''Proceedings of the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics'' (HEFAT), 14–16 July 2014, Orlando, FL, USA.〕
Energy recovery ventilators (ERVs) are closely related, however ERVs also transfer the humidity level of the exhaust air to the intake air.
==Benefits==
As building efficiency is improved with insulation and weather stripping, buildings are intentionally made more airtight, and consequently less well ventilated. Since all buildings require a source of fresh air, the need for HRVs has become obvious. While opening a window does provide ventilation, the building's heat and humidity will then be lost in the winter and gained in the summer, both of which are undesirable for the indoor climate and for energy efficiency, since the building's HVAC systems must compensate. HRV introduces fresh air to a building and improves climate control, whilst promoting efficient energy use.
UK building regulations require one air change every two hours (0.5 ACH). With traditional extract-only ventilation that means your boiler has to warm up a house full of cold air 12 times a day.〔http://www.solarcrest.co.uk/heat-recovery-ventilation.asp〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「heat recovery ventilation」の詳細全文を読む



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