Source: Energy & Management Powernews, 04 October 2022
For a climbing hall "RMB/ENERGIE" has installed the CHP plant. The CHP is an essential element in the complex interaction of heating, ventilation and the energy supply.
Due to the weather, climbing training in the alpine mountains is not always possible without danger. In Kaufering, Upper Bavaria, climbing enthusiasts can pursue their hobby in any weather. The "Kletter- und Boulderhalle am Lech GmbH" had the hall called "Kletterei" built, including offices and a restaurant. The climbing and bouldering hall poses special challenges in terms of temperature and ventilation conditions. Since it also has a high overall energy requirement, a combined heat and power plant is an essential component for supplying electricity, heat and also cooling.
Markus Wasserle is managing director of the Kaufering climbing hall. Together with the local groups of the German Alpine Club (DAV), he planned the equipment for the facility. A key requirement in the process was to conserve as much energy and resources as possible. After all, despite all the efforts to achieve high energy efficiency, it is clear that there are limits to this in such a large leisure facility that can hardly be undercut, namely for room air conditioning and for the hot water supply. The operator therefore opted for a highly efficient CHP plant. The combined heat and power plant comes from the manufacturer RMB Energie, from the company Rössle Technikplanung the building services.
The CHP with up to 20 kW of electrical and up to 45.8 kW of thermal power serves the base load of heat and power supply since 2019 with an overall efficiency of 109.2%, according to the manufacturer. Together with a 99-kW photovoltaic system, it covers most of the total annual electricity demand of around 350,000 kWh. About 6,000 kWh are purchased from the public grid. A 60 kW gas condensing boiler from Weishaupt was also installed for additional heat generation.
Base-load CHP for high self-sufficiency
The heat-controlled CHP takes over the base load and the condensing boiler the peak load. The heat supplied by the CHP - and if necessary by the gas condensing boiler - is used in the climbing plant for heating not only in winter. In summer, according to RMB Energie, it is used to feed a Fahrenheit brand adsorption chiller with a cooling capacity of 25 kW from a storage tank that is continuously tempered to 80 degrees Celsius. To the plant belongs besides a buffer memory with approximately 1,250 liters.
Since the "neoTower BHKW" works modulating over a broad achievement span, a clocking enterprise with frequent starts is largely avoided. "The CHP runs through over long phases. In doing so, it adapts in a modulating manner depending on the amount of energy required," explains Roy Block of the manufacturer RMB Energie. According to the manufacturer, the power range is between 10.7 and 20 kW of electrical output and, on the heat side, between 29.1 and 45.8 kW of thermal output. This is significant not least in the interest of a high self-supply of electricity, which is extremely lucrative for the operator and ensures him a manageable payback period. In addition, it requires less gas.
The long maintenance interval, which is due with the Neo Tower 20.0 only every 6,000 operating hours, also contributes to the low operating costs. The service at the equipment can be automated moreover, if one concludes one of the three different maintenance contract models, communicates the manufacturer in addition further. The operator of the climbing hall decided for the economical basis maintenance contract, which covers services and a remote monitoring.
Constructively already ex factory low-noise conceived, became the CHP by a structure-borne sound decoupling with underlaid Sylodynstreifen and by the absorption sound absorber set ASD-17 in DN 80 of "ATEC" so quietly that it is acoustically no longer perceptible in the climbing hall itself. From Atec also comes the rest of the exhaust system for the combined heat and power plant.
Heating and ventilation system the largest electricity consumer
The heating and ventilation system is the largest electricity consumer of the "climbing". For example, the handles of the climbing facility need to be cleaned regularly. In comparable facilities, they are usually cleaned cold, which did not seem hygienic enough to the operator of the "Kletterei". He therefore uses a high-pressure cleaner with hot water, which is also supplied by the CHP unit. This cleaning is not only more thorough, but also faster, which therefore also saves personnel costs.
In addition, draft-free hall ventilation, heating and air conditioning were desired. On the one hand to favor with sweaty sportswear no colds, on the other hand to avoid high dust loads in the room air. Climbing also requires a lot of magnesium powder for the hands, which must be removed so as not to contaminate the room air. In "climbing," the airflow of the two-zone air conditioning system helps to reduce the amount of dust. One zone is assigned to the 15-meter-high climbing hall, the other to the bouldering hall, which is about five meters high.
In the climbing hall, the space between the inner wall and the climbing walls mounted at a distance from it is used for ventilation and exhaust. The air ducting is separated by a partition at a height of four meters. In the lower part, the exhaust air is led underground to the technical room through ground collectors. Special filters catch the particles and clean the air, which is enriched by filtered outside air and then fed back into the hall through the holes in the climbing walls. Due to the wide distribution of a large number of such holes, this happens absolutely draught-free.
The plant at a glance
- Operator: Kletter- und Boulderhalle am Lech GmbH
- Plant: BHKW "neoTower 20.0" from the manufacturer RMB Energy, gas condensing boiler from Weishaupt with 60 kW and an absorption silencer set ASD-17 in DN 80 from "ATEC", adsorption chiller from Fahrenheit
- Special feature: base-load CHP with modular operation to ensure the needs of the sensitive temperature and ventilation conditions in the climbing hall
- Contact : Roy Block, Sales Germany South, Austria at RMB Energy, Contact by Mail
Author: Heidi Roider
Accessibility
Language
