Air cooling and drying units (LKTA, LK, LKL)

With our air-conditioning systems, we can cover virtually all quantities of air, temperature and dew point ranges.

Our customised devices are primarily used in the process air area for use wherever conventional devices in the field of technical building equipment cannot provide satisfactory solutions. In addition to a wide service range, our air-conditioning units can take into consideration customer-specific factory standards or specific hygiene requirements.

We can already cover a wide range of services with our standardised designs, the LK, LKTA or LKL process air coolers. The proven and advanced devices offer an ideal price-performance ratio, especially for the pneumatic transportation of bulk materials.

Our process air coolers (LK) are characterised by very low pressure loss and are ideal for air cooling and air drying of pneumatic flow rates. Of course, other applications are also possible. The process air cooler (LK) is filled with a water-glycol mixture, which is either supplied by the customer or by a WEISSHAAR liquid cooler.

Our compact process air cooler units (LKTA) are always used wherever individual process volume flows are to be conditioned and no refrigerant (e.g. water-glycol), which is supplied by the customer, can be used. The refrigeration is integrated directly in the LKTA process air cooler and ensures stand-alone operation of the chiller without additional costs and thus without the associated assembly. Depending on the condition of the machinery room, we can offer our LKTA device as a split unit with an external air-cooled condenser. The condenser heat is then discharged outside the machinery room without adversely affecting the building’s air-conditioning system.

Our air-to-air cooler series (LKL) is primarily used for pre-cooling a compressed process air flow. The compression heat can be initially discharged to the outside air using an air-to-air cooler in an energy-efficient manner and without supplying expensive cooling medium. If additional cooling is required, a corresponding after-cooler is installed, whose load is efficiently reduced by the upstream air-to-air cooler, depending on the ambient temperature.

Please contact us about how to use the valuable waste heat of this process air. We have already implemented a number of beneficial heat recovery installations.

With low dew points (< 4°C), an additional drying step is required in addition to the traditional cool drying. After the pre-drying stage, the process volume flow passes through a sorption dryer, which is already integrated in the system. The sorption dryer consists of a rotating drying wheel which contains highly hygroscopic material that binds moisture from the air.

For more information, see the PDF.

1. What distinguishes the series process air cooler from other coolers?

The LK and LKTA series use an optimised air cooler, which has a negligible loss of pressure in pneumatic applications. The design is suitable for both atmospheric and pressure-resistant processes. The heat exchanger has an energy-efficient design.

2. What does direct evaporation mean?

Direct expansion refers to the direct exchange of heat between the refrigerant and process air. No other refrigerant, such as glycol/water, is used. This means that the cooling energy can be generated at the ideal temperature level, because there are no additional losses, such as additional heat exchanger and pump losses. This makes the system highly energy efficient. With several parallel systems, however, a central refrigeration supply is more favourable. We are happy to provide you with any necessary assistance.

3. Our company already uses cold brine as a ring line. The low pressure loss of your system would be beneficial for us. Can we use your devices?

The process air cooler is also available for ice water or glycol/water mixtures supplied by the customer. An integrated control group considerably simplifies the local piping costs.