Bypass Factor & its significance – HVAC & Engineering
2021年12月25日 · Bypass factor is the function of the physical & operating characteristic of the conditioning apparatus. It represents that portion of the air which is considered to pass through the conditioning apparatus completely unaltered.
Moist Air - Cooling and Dehumidifying - The Engineering ToolBox
Bypass Factor - BPF. The Bypass Factor - BPF - (or BF) is also used to express cooling coil efficiency as. BPF = (h B - h C) / (h A - h C) = (t B - t C) / (t A - t C) = (x B - x C) / (x A - x C) (2) where. BPF = Bypass Factor (BF) The relationship between the Contact Factor and the Bypass Factor can be expressed as. BPF = 1 - β (3)
Coil SHR, Ventilation, and Bypass Factor - HVAC School
2020年5月15日 · However, a small percentage of air will bypass the coil and not transfer its heat to the coil. This can be calculated using the known apparatus dew point. The bypass factor formula is as follows: Bypass Factor = (Supply Air Temperature – Apparatus Dew Point) ÷ (Mixed Air Temperature – Apparatus Dew Point)
Air cooling : Contact factor and Bypass factor of air cooling coils
What is the contact factor of a cooling coil ? What is the bypass factor of an AHU ? How to calculate the cooling capacity of a coil to cool down air ?
bypass factor - HVAC & Engineering
2022年3月14日 · Bypass factor is the function of the physical & operating characteristic of the conditioning apparatus. It represents that portion of the air which is considered to pass through the conditioning apparatus completely unaltered.
Typical bypass factors for various applications (adapted from …
The cooling coil has an intrinsic bypass factor, depending on its geometrical characteristics, with typical values given in Table 1, or can be bypassed by a mixture of outdoor and return air,...
The percentage of air that passes through the coil unchanged is called the bypass factor. Do you know why the actual process is not a straight line? Can you draw such a cycle for Hong Kong summer conditions? 1. Sensible heat ratio (SHR) 2. Space cooling load. 3. Cooling coil’s load/capacity. 4. Humidification capacity. 5. Mixing processes.
Bypass Factor (Short Podcast #56) - HVAC School
In this short podcast episode, Bryan covers the bypass factor in airflow and psychrometrics. He also explains why it matters to techs. The bypass factor is a ratio: you take the difference between the evaporator coil temperature and outlet air temperature as compared to the inlet.
Psychrometric Process (with chart)| Air Conditioning | Thermal Engineering
The ratio of the bypassed air to the total air is called the bypass factor (BF). Given the bypass factor and the coil surface temperature, actual temperature of air can be found by using the equation.
Module 9: The basic psychrometric processes - CIBSE Journal
The term ‘bypass factor’ is sometimes used and is simply (1 – contact factor). The process that would typically result from a steam humidifier (almost pure latent heating) is indicated in Figure 4 – it can reasonably be considered as a vertical line following a constant dry-bulb temperature.