What is a large temperature difference fan coil unit

Large temperature difference fan coil unit

Simply put, it is a fan coil unit (FCU) specifically designed to adapt to the working conditions of large supply and return water temperature differences in chilled water, and belongs to the end of the water machine central air conditioning system; The standard air fan is typically designed for a 7 ℃ water supply/12 ℃ return water (5 ℃ temperature difference), while the large temperature difference version is designed for supply and return water temperature differences of 8-10 ℃ or even greater (such as 5 ℃/13 ℃, temperature difference of 8 ℃).

The core difference from ordinary fan coil units

1. Heat exchange coil structure

Large temperature difference fan plates generally use multiple rows of pipes (3 rows, 4 rows), high-efficiency copper pipes with internal teeth, optimized flow paths, and improved water side heat transfer capacity; Under the same cooling capacity, a smaller water flow rate and a greater water temperature rise are allowed. Most ordinary wind turbines have two rows of pipes, which are only suitable for small temperature differences of 5 ℃ and high flow operation.

2. Characteristics of waterways

Large temperature difference → With the same cooling capacity, the water flow rate is smaller, the power consumption of the chilled water pump decreases, and the pipe diameter can be chosen to be smaller, resulting in lower pipeline investment; The cost is that the water resistance of the coil is higher than that of the ordinary fan, and the head of the water pump needs to be recalculated.

3. Working condition risk

Ordinary fan plates forcibly run large temperature differences, resulting in insufficient heat exchange, easy condensation at the air outlet, and loss of dehumidification control; Special coils for large temperature differences are designed to ensure stable cooling capacity and dehumidification ability under large temperature difference conditions.

MECO high ΔT fan coil units suitable for projects such as centralized water machine air conditioning, regional cooling, cold storage air conditioning, large factories, shopping malls, and office buildings that require reducing transportation energy consumption. This product can reduce the flow rate of the water system and significantly save energy for the water pump; The specifications of water pipes, valves, and insulation materials have been reduced, saving on pipe and installation costs; Superior performance, suitable for centralized cooling, water storage cooling, and large-scale commercial/industrial water turbine projects.