BZ Model – Direct-Fired Absorption Chiller

The BZ absorption chiller runs on natural gas or other fuels. It produces cooling, heating and hot water: a good solution where electricity is expensive.

Specifications

• Cooling capacity: 233 kW – 11,630 kW
• Gas pressure: 16 kPa – 50 kPa (standard)
• Burner: gas and diesel, low NOx emissions (< 10 ppm)
• Functions: cooling, heating (65 °C water) and domestic hot water

How does it work?

Cooling

The heat from the burner warms a lithium bromide (LiBr) solution, which releases water vapour. This vapour is condensed by the cooling water, then the water flows into the evaporator, under high vacuum: there it evaporates on copper tubes and cools the chilled water from 14 °C to 7 °C. The vapour is then absorbed again by the concentrated solution, and the cycle starts over.

Heating

The heat from the burner warms the LiBr solution. The vapour produced heats the heating water or hot water in tubes, then the condensate returns to the solution and the cycle repeats.

Key benefits

• 3 functions in 1: cooling, hot water and heating water, together or separately
• Heat produced by “separate heating”, as simple as a vacuum boiler: the service life of the unit can be doubled
• Low-NOx burner (< 10 ppm)

Applications

• Regions where electricity is expensive
• Buildings that need cooling, heating and hot water: hotels, offices, leisure parks (see our references)

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Our references