407 refrigerant usage: For a single unit of 15 horsepower, it is approximately≈ 6-8 kilograms.
For a 60HP requirement: 8 * 4KG ≈32KG

Differences Between Air-Cooled Chillers and Water-Cooled Chillers
Many customers mistakenly think that air-cooled chillers blow out cold air, and only water-cooled chillers are for cooling water. In fact, this is not the case.
Both air-cooled and water-cooled chillers are used to cool the water in equipment or containers; the two only differ in heat dissipation processes and operating conditions.
For an air-cooled chiller, after the water tank converts water into chilled water and pumps it into the customer's equipment, the chiller dissipates its own heat through the heat dissipation net and fans inside the unit. It features simple pipe connection – you only need to connect a tap water pipe to the chiller's water tank and two inlet and outlet pipes to the customer's equipment for operation. It is easy to use and move, making it suitable for factories that find it inconvenient or troublesome to connect a cooling tower. However, the air-cooled chiller has requirements for its placement environment: it cannot be placed against walls or in corners, the workshop floor cannot be too low, the workshop cannot be too stuffy, and there must be good air circulation. Otherwise, its heat dissipation and refrigeration functions will be affected.
The working principle of a water-cooled chiller is that after the water tank cools the water, the water pump sends it into the customer's equipment that needs cooling. The chiller's own heat is removed by the cooling water of the cooling tower from the heat source in the chiller's condenser. Its advantages are that it is not picky about the environment or placement location – you can even place it in a corner against the wall without any impact on its heat dissipation and refrigeration. The refrigeration speed of a water-cooled chiller is 1.2 times that of an air-cooled chiller! Its disadvantage is that it must be used with a connected cooling tower, involving complicated pipe connection and being not easy to move at will.

风冷式冷水机组与水冷式冷水机组的区别
许多客户错误地认为，风冷式冷水机组只会吹出冷空气，而只有水冷式冷水机组才用于冷却水。实际上并非如此。
风冷式和水冷式冷水机组都用于冷却设备或容器中的水；它们的区别仅在于散热过程和运行条件。
对于风冷式冷水机组而言，水箱将水转化为冷冻水并将其泵入客户的设备后，冷水机组会通过机组内部的散热网和风扇来散发自身热量。其特点在于管道连接简单——只需将自来水管道连接到冷水机组的水箱，以及将两根进水管和出水管连接到客户的设备即可进行运行。使用和移动都很方便，使其适合那些觉得连接冷却塔不方便或麻烦的工厂。然而，风冷式冷水机组对放置环境有要求：不能紧贴墙壁或在角落放置，车间地面不能太低，车间不能太闷热，必须有良好的空气流通。否则，其散热和制冷功能将会受到影响。
水冷式冷水机组的工作原理是：水箱将水冷却后，水泵将水输送到需要冷却的客户设备中。冷水机组自身的热量由冷却塔中的冷却水从冷水机组冷凝器中的热源中带走。其优点是它对环境和安装位置不挑剔——你甚至可以把它放在墙角，而不会对其散热和制冷产生任何影响。水冷式冷水机组的制冷速度是风冷式冷水机组的 1.2 倍！其缺点是必须与连接的冷却塔一起使用，涉及复杂的管道连接，并且不易随意移动。

Standard model air-cooled Chiller 标准款风冷式冷水机

Lobe-type air-cooled chiller 螺杆式风冷冷水机

Water-cooled chiller 水冷式冷水机

     The water-cooled chiller has excellent heat dissipation performance and can operate normally for cooling even when the temperature reaches 40 degrees in summer. As long as the cooling tower at  factory has sufficient heat dissipation capacity, the cooling efficiency of the water-cooled chiller is 30% faster than that of the air-cooled type. Moreover, the water-cooled chiller is not picky about the environment or temperature. As long as the cooling water from the cooling tower can provide sufficient heat dissipation for the chiller, there is no need to worry about the cooling process!

水冷式冷水机它具有良好的散热性能，而且在夏季温度达到40度的情况下是可以正常运行冷却的，只要工厂冷却塔有足够的散热量，那水冷冷水机它的制冷时效是比风冷的要快30%时效的，而且水冷式冷水机它不挑环境不挑气温，只要冷却塔的散热水可以供冷水机散热，那使用冷却是不需要担心的！

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