AGO AG Energie + Anlagen invites to Kulmbach on the occasion of the Colloquium of Refrigeration Engineering on 25 September 2007

On 25 September 2007 AGO AG Energie + Anlagen and ILK Dresden are organizing an event in the Bavarian Brewery Museum of Kulmbach on the subject of waste heat utilization for low temperature cold production.

Whenever temperatures below 0°C are required in the food and beverage industry for cooling finished products or raw materials compression-type chillers operated by electric power come into play. Still! Because electricity keeps getting more expensive and its generation comes along with undesirable pollutant emissions. Therefore, the utilization of another kind of energy which many companies virtually dispose of for free as it already exists comes in useful. We are talking about waste heat which occurs during production processes for groceries (e.g. baking lines) or during the operation of combined heat and power plants but which is more or less completely discharged to the outside without any further use. What a waste!

The colloquium’s agenda includes lectures on the mode of operation, areas of application and most of all cost savings enabled by the ammonia/water absorption chiller for temperatures below 0°C. The target audience are decision makers from the food and beverage industry, in particular technical directors or production managers. Engineering consultants and planning agents who deal with efficient designs of production facilities and energy supply are also more than welcome.

The absorption chiller’s mode of operation
The refrigerant (ammonia) absorbs a heat flow on the ‘cold side’ and evaporates in doing so. The refrigerant vapour is absorbed by a liquid solution (aqueous ammonia solution) which has a higher dissolving power. The thereby released heat flow has to be dissipated. A pump with a low energy input conveys the incompressible solution with the refrigerant to a higher pressure level. By adding heat in the generator (propulsion of the process) the refrigerant escapes from the solution and is liquefied in the condenser by dissipating heat. The refrigerant cycle and solution cycle are closed by means of relief valves. In order to increase the energy efficiency the solution cycle is equipped with a heat exchanger. Ammonia as refrigerant has excellent thermodynamic characteristics. Therefore, it is one of the classic refrigerants, which has been used by Linde in their refrigeration devices and thus has been made available for a wide range of applications. To this day, ammonia has maintained its significance. Despite the toxicity and flammability (in a small range) of ammonia, this type of refrigeration plant is safe according to the state of the art.

Areas of application:

• Food and beverage industry
• Bakery, chips factories, deep fry factories
• Milk refrigeration
• Freeze / cold storage
• Fish processing companies
• Chemical and petrol-chemical industry
• Gas turbine air cooling
• etc.

About AGO AG Energie + Anlagen

AGO AG Energie + Anlagen, with its registered office in Kulmbach, was founded in 1980 and is specialized in the area of innovative and efficient energy supply facilities for industrial customers and municipalities. Main focus of AGO AG Energie + Anlagen is laid on the following business divisions: plant development and implementation, as well as service and consulting. The core competence of the company mainly commits to thermal power stations, to heating, cooling and ventilation technology plant construction, biomass cogeneration plants and trigeneration. Site studies and development, consulting in energy efficiency, resource and fossil fuel management as well as emission trade management – these factors complete the business model. AGO symbolizes efficiency, security and technological competence of your energy supply facilities.