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Ventilation and Air Conditioning for Private Indoor Swimming Pool Halls

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Ventilation and Air Conditioning for Private Indoor Swimming Pool Halls PRIVATE INDOOR SWIMMING POOL Creating an ideal indoor climate for sportsmen and wellness fans. Good air means feeling good The air quality in an indoor swimming pool determines how long guests remain in the pool – they won’t stay long unless the pool air climate is comfortable and cozy. Mug- gy or cold air – or even drafts – quickly ruin any fun in a pool. Reduce energy costs Operating an indoor pool means expensive energy costs. The use of highly efficient technology lowers these costs and, in addition, makes a major, positive difference in assuring comfortable room climate. Protect building substance Poor thermal insulation, in conjunction with poorly installed moisture barriers, is the most frequent cause of damage when conditions fall below the dew point on the indoor side of a building shell. Over the long run, this leads to damage by condensa- tion. Hygienic coziness When water evaporates from the surface of an indoor swimming pool, by products of disinfection enter the room air. These are substances created by disinfection of the water that can release unpleasant odors. An intelligent control system, together with a highly efficient recuperator, dehumidifies the indoor pool with outdoor air. The excess humidity is extracted along with the exhaust air from the pool, and with the smelly substances. The feel-good factor makes the difference AND THE AIR HANDLING UNIT PLAYS A KEY ROLE TEMPERATURE AND ENERGY REQUIREMENTS Today, owing a private pool often com- lated air passes warmth over all building fier system, not only assure constant air As a rule, indoor pool water temperature the mugginess limit for an unclad per- 3. The evaporation heat requirement bines the comfort of a wellness oasis and components, which prevents conden- conditions in the pool: they also con- lies between 28 and 32 °C. son. Three variables basically determine (QE) describes the amount of heat a fitness facility. This makes an indoor pool sation on the cooler elements. Second, tribute – with effectively controlled and Pool air temperature is usually 2 to 4 °C the heat requirement of an indoor pool: required to compensate for the heat a pleasant place to retreat from the stress uniform air movement over the pool en- demand-driven outdoor air handling – higher than pool water temperature – but loss arising from evaporation of the pool of everyday life. ables by products of disinfection evapo- to a comfy and healthy room climate. not higher than 34 °C. This slight temper- 1. The transmission heat requirement water. Approx. 90 % of the heat requi- rated from the water to be extracted from Highly efficient heat recovery reduces en- ature difference is virtually unnoticeab- (QT) describes the amount of heat re- red for this evaporation is extracted Especially in a private swimming pool, the the pool by the room ventilation system. ergy consumption here to a minimum for le for the pool user. The partial-pressure quired to compensate for the loss of from the water, and approx. 10 %, from main focus is on the feel-good factor – Owing to uninterrupted evaporation from dehumidification of the swimming pool. difference resulting under these condi- heat through the building shell. Effec- the air: heat which must be replaced and a cozy, comfortable indoor climate at the water surface, dehumidification of the tions keeps the amounts of water evapo- tive thermal insulation for the building by the customer’s heating system. The the pool plays a key role. It is not only the pool air must take place around the clock, rated – and, in turn, the energy required for can keep this heat requirement at a low same applies to the heat requirement interplay between room temperature and even when the pool is not in use – to pre- dehumidification – at a comparatively low level. for replenishment of the evaporated humidity that makes a major contribution vent damage to the shell and to other level. The temperature and the relative 2. The ventilation heat requirement pool water and for heating it to the here – air-flow distribution is also essenti- components of the building. humidity in an indoor pool are extremely (QV) describes the amount of heat desired temperature. A heat pump with al and must be perfectly coordinated with important in determining the comfort ex- required to heat outdoor air to the a water-cooled condenser, integrated in room conditions. Drafts and misted-over Swimming pool equipment that dehumidi- perienced by the pool user. The absolute desired indoor-pool air temperature. the heat pump, can recover part of this windows should be avoided. Air-flow fies the air with outdoor air enables main- water content of the air in the indoor pool Employment of a high-efficiency re- heat from the dehumidification process. control must ensure uniform air circulation taining a comfortable pool atmosphere. plays an essential role here: a level of 14.3 g cuperator can reduce the associated around the pool. Air circulation is essential Advanced control systems, in connection water/kg air should not be exceeded for energy costs to an extremely low level. from two standpoints: first, properly circu- with an efficiently designed dehumidi- any lengthy period. This value represents 2 Private swimming pools | 2018/11/ENG | Subject to technical modifications. © Menerga GmbH | www.menerga.com Private swimming pools | 2018/11/ENG | Subject to technical modifications. © Menerga GmbH | www.menerga.com 3 Indoor pool dehumidification AHU in indoor swimming pools DIMENSIONING OF THE VENTILATION SYSTEM AIRFLOW DISTRIBUTION, USER COMFORT, AND ENERGY DEMAND The surface area of the water and the use rate from evaporation during pool-swim- and the extracted air (14.3 g/kg). This out- The AHU used in an indoor pool combine The positioning of the air valves and diffu- So-called disinfection by products can of the pool are key factors in evaporation ming and idle modes. Water attractions – door air mass flow required for dehumidifi- several functions. The main function of sers in the indoor pool plays a primary role be produced in the indoor pool during of the pool water. An additional, deciding e.g., a counter-current unit – increase the cation is converted, using the density of airflow distribution consists of extracting in determining user comfort. Air duffusers, pool cleaning and disinfection of the wa- influencing variable is the partial pressure amount of water evaporated. Calculation the air, into an outdoor air volume flow. moist air from the pool and feeding it to in particular, must be arranged such that ter. When the water evaporates, these difference: i.e., the difference in pressure of dehumidification capacity must take This volume flow determines the capacity an air handling unit. At the same time, the zones occupied by pool users are free by-products enter the air of the pool. If between the saturation vapor pressure at into consideration the use of such attrac- of the dehumidifier. the drier supply air will be fed upward of drafts. The supply air must produce air distribution ensures transport of these pool-water temperature, and the partial tions. Ideally, the calculated evaporative into the indoor pool via the duct system: flow that assures effective air circulation disinfection by-products in the air extrac- pressure of the water vapor in the pool water mass flow will be extracted via the as a rule, through diffusers in the vicinity in all areas of the pool. The effectiveness ted to the outside, this enhances pool user air. On the basis of these factors, guideline dehumidifier by outdoor air. The required of the windows. Inside the AHU, the out- of these functions essentially depends comfort. VDI 2089 sheet 1 of the Association of amount of outdoor air is calculated with door air required for dehumidification will on whether the fans at all operational German Engineers describes the calcula- reference to a difference in absolute water be mixed with the supply air. The required points provide constant amounts of sup- tions for determining the water mass flow content between the outdoor air (9 g/kg) amount of moist extracted air, with heat ply and extracted air. The position of the removed by the recuperator, will be trans- extract air valves must be located in ported outside as outgoing air. The heat the upper area of the pool such that obtained in this matter will be transferred it prevents a ventilation short-circuit in the recuperator to the supply air. between supply air and extracted air. QV QT Qsupply air = QT+QE © T. Phillippi © T. © T. Phillippi © T. © fnoxx slot diffuser Southern Germany Southern Germany Alsace, France WELLNESS POOL WELLNESS POOL SPORT AND WELLNESS POOL QE This private indoor pool seems to float over A splendid home for wellness in luxurious Private swimming pool with generous Q the roofs of the city. ambience. wellness zone. water Extracted air Supply air Machine room LPHW ETA SUP ODA EHA QV ETA EHA © htarchitektur BDA © htarchitektur © Klaus Bauer Lower Rhine, Germany Münsterland, Germany Majorca, Spain WELLNESS POOL SPORT AND WELLNESS POOL SPORT AND WELLNESS POOL This private pool offers ideal relaxation in a A combination of sports and wellness in a Stylish, Mediterranean facility in Spanish highly compact space. perfectly matched ambience. Majorca. 4 Private swimming pools | 2018/11/ENG | Subject to technical modifications. © Menerga GmbH | www.menerga.com Private swimming pools | 2018/11/ENG | Subject to technical modifications. © Menerga GmbH | www.menerga.com 5 IMPORTANT STANDARDS AND DIRECTIVES BUILDINGS AHU Directive for Ventilation Systems (LüAr) German directive on technical fire-protec- Energy Saving Ordinance (EnEG) Machine Directive 2006/42/EG tion requirements for ventilation systems German law for saving energy in buildings Ecological Design Directive 2009/125/ Technical Guide for Noise (TA-Lärm) Building Energy Ordinance (GEG) EG German technical guide for protection German ordinance for encouragement of German directive for stipulation of require- from noise renewable energy in heating areas.
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