{"id":2384,"date":"2025-04-08T10:28:02","date_gmt":"2025-04-08T02:28:02","guid":{"rendered":"http:\/\/www.osaces.com\/?p=2384"},"modified":"2025-04-08T10:28:02","modified_gmt":"2025-04-08T02:28:02","slug":"youyongchitongfengyuchushixitongdehuangjinbilifengliangshiduyunenghaodepinghengfaze","status":"publish","type":"post","link":"http:\/\/www.osaces.com\/en\/youyongchitongfengyuchushixitongdehuangjinbilifengliangshiduyunenghaodepinghengfaze\/","title":{"rendered":"The Golden Ratio of Swimming Pool Ventilation and Dehumidification Systems: The Balancing Act of Airflow, Humidity and Energy Consumption"},"content":{"rendered":"<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 In the design and operation and maintenance of indoor swimming pools, the performance of ventilation and dehumidification systems directly affects the comfort, safety and operating costs of the pool environment. How to find the \"golden ratio\" between airflow, humidity and energy consumption is the core challenge for engineers, designers and operation and maintenance teams. Based on the ASHRAE standard and actual measurement data, this paper analyzes the dynamic balance strategy among the three, providing a scientific basis for swimming pool system optimization.<\/span><\/p>\n<hr \/>\n<h4><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>I. Theoretical Model: Basic Calculation of Air Volume and Humidity<\/strong>\u200c<\/span><\/h4>\n<ol style=\"list-style-type: upper-roman;\">\n<li>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>ASHRAE airflow calculation framework<\/strong>\u200c<\/span><br \/>\n<span style=\"font-family: helvetica, arial, sans-serif;\">According to ASHRAE 62.1, there are two conditions that need to be met for the minimum amount of fresh air for indoor pools:<\/span><\/p>\n<ul>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>human respiratory requirements<\/strong>: Calculated at 10 L\/s of fresh air per capita (based on maximum occupancy).<\/span><\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Humidity control requirements<\/strong>: Calculate the amount of dehumidification required by using the evaporation formula, and then invert the ventilation airflow.<\/span><\/li>\n<\/ul>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">Eq. simplifies the expression to:<span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">Q<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"mord mathnormal\">A<\/span><span class=\"mord mathnormal\">C<\/span><span class=\"mord mathnormal\">H<\/span><span class=\"mbin\">\u00d7<\/span><span class=\"mord mathnormal\">V\/60<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<ol>\n<li>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">Among them.<span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">Q<\/span><\/span><\/span><\/span>is the fresh air volume (m\u00b3\/h).<span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">A<\/span><span class=\"mord mathnormal\">C<\/span><span class=\"mord mathnormal\">H<\/span><\/span><\/span><\/span>is the number of air changes per hour.<span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">V<\/span><\/span><\/span><\/span>is the volume of the pool space (m\u00b3).ASHRAE recommends that the number of air changes for indoor pools be controlled at 4-6 times\/hour, which needs to be adjusted in conjunction with the humidity load.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Thresholds for humidity control: Dew point temperature vs. evaporation<\/strong>\u200c<\/span><br \/>\n<span style=\"font-family: helvetica, arial, sans-serif;\">Pool surface evaporation (<span class=\"katex\"><span class=\"katex-mathml\">W<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">W<\/span><\/span><\/span><\/span>) is calculated by the Dalton formula:<\/span><\/p>\n<p><span class=\"katex-display\" style=\"font-size: 18pt;\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">W<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mopen\">(<\/span><span class=\"mord\"><span class=\"mord mathnormal\">P<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">w<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mbin\">-<\/span><\/span><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">P<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">a<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mclose\">)<\/span><span class=\"mbin\">\u00d7<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">A<\/span><span class=\"mbin\">\u00d7<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">F<\/span><\/span><\/span><\/span><\/span><\/p>\n<ul>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">P<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">w<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>: Saturated vapor pressure (kPa) at the water surface, positively correlated with water temperature;<\/span><\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">P<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">a<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>: Actual vapor pressure of air (kPa);<\/span><\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">A<\/span><\/span><\/span><\/span>: Pool water surface area (m\u00b2);<\/span><\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">F<\/span><\/span><\/span><\/span>: Evaporation coefficient (usually taken as 0.1-0.2, influenced by wind speed and intensity of activity).<\/span><\/li>\n<\/ul>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">When the ventilation airflow is insufficient<span class=\"katex\"><span class=\"katex-mathml\">Pa<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">P<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">a<\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>Elevated, resulting in evaporation<span class=\"katex\"><span class=\"katex-mathml\">W<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">W<\/span><\/span><\/span><\/span>The humidity will drop, but too much humidity will cause condensation problems; on the other hand, excessive ventilation can reduce humidity, but it will cause heat loss and energy consumption to rise.<\/span><\/p>\n<\/li>\n<\/ol>\n<hr \/>\n<h4><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Second, dynamic equilibrium: air volume, humidity and energy consumption of the game<\/strong>\u200c<\/span><\/h4>\n<ol>\n<li>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>\"The Three Core Principles of the Golden Ratio<\/strong>\u200c<\/span><\/p>\n<ul>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Principle 1: Prioritize humidity<\/strong>--Control air humidity at 50%-60% (dew point temperature \u226414\u2103) to avoid structural corrosion and mold growth.<\/span><\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Principle 2: Minimum airflow<\/strong>--Select the minimum number of air changes (e.g., 4\/hour) to minimize heat loss while meeting humidity requirements.<\/span><\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Principle 3: Energy recovery<\/strong>--Compensate for energy loss due to ventilation by recovering latent heat of evaporation through heat pump dehumidifiers.<\/span><\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Energy saving optimization path<\/strong>\u200c<\/span><\/p>\n<ul>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Path 1: air volume hierarchical control<\/strong>\u200c<\/span><br \/>\n<span style=\"font-family: helvetica, arial, sans-serif;\">Dynamically adjust the airflow according to the intensity of pool use (e.g. opening hours, number of visitors). Example:<\/span><\/p>\n<ul>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">Peak hours: 6 air changes\/hour enabled;<\/span><\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">Low hours: drop to 4 times\/hour in conjunction with a dehumidifier to maintain humidity.<\/span><\/li>\n<\/ul>\n<\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Path 2: Heat pump system integration<\/strong>\u200c<\/span><br \/>\n<span style=\"font-family: helvetica, arial, sans-serif;\">With dehumidifiers with heat recovery (such as the Dantherm CDP series), the heat recovered during dehumidification is used for pool water or air heating, saving energy up to 60%-70%.<\/span><\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Path 3: Intelligent Predictive Control<\/strong>\u200c<\/span><br \/>\n<span style=\"font-family: helvetica, arial, sans-serif;\">Through the humidity sensor + AI algorithm to pre-determine changes in evaporation (e.g., sudden weather changes or event bookings), the ventilation and dehumidification modes are adjusted in advance to avoid overloading or redundant operation of the system.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<hr \/>\n<h4><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>III. Practical verification: comparison of measured data and cases<\/strong>\u200c<\/span><\/h4>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">An international hotel swimming pool renovation project as an example, the original system uses a fixed 6 times \/ hour air exchange + traditional dehumidifier, after the renovation upgraded to variable frequency ventilation + heat pump dehumidification linkage system, data comparison is as follows:<\/span><\/p>\n<table style=\"width: 41.1757%;\">\n<thead>\n<tr>\n<th style=\"width: 34.767%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">norm<\/span><\/th>\n<th style=\"width: 26.1656%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">pre-remodeling<\/span><\/th>\n<th style=\"width: 27.3334%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">after remodeling<\/span><\/th>\n<th style=\"width: 35.8169%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">degree of reduction (in prices, numbers etc)<\/span><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"width: 34.767%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">Average annual energy consumption (kWh\/m\u00b2)<\/span><\/td>\n<td style=\"width: 26.1656%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">320<\/span><\/td>\n<td style=\"width: 27.3334%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">180<\/span><\/td>\n<td style=\"width: 35.8169%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">43.8%<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 34.767%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">Humidity compliance (%)<\/span><\/td>\n<td style=\"width: 26.1656%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">75% (highly volatile)<\/span><\/td>\n<td style=\"width: 27.3334%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">95% (stabilized)<\/span><\/td>\n<td style=\"width: 35.8169%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">&#8211;<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 34.767%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">Equipment failure rate (times\/year)<\/span><\/td>\n<td style=\"width: 26.1656%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">8<\/span><\/td>\n<td style=\"width: 27.3334%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">2<\/span><\/td>\n<td style=\"width: 35.8169%; text-align: center;\"><span style=\"font-family: helvetica, arial, sans-serif;\">75%<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Key improvement points<\/strong>::<\/span><\/p>\n<ul>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">Frequency-controlled fans adjust airflow according to real-time humidity, reducing ineffective ventilation;<\/span><\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">Heat pump dehumidifiers recover heat for pool water thermostat and reduce boiler load;<\/span><\/li>\n<li><span style=\"font-family: helvetica, arial, sans-serif;\">Intelligent control system reduces manual intervention errors.<\/span><\/li>\n<\/ul>\n<hr \/>\n<h4><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>IV. Design recommendations: 4 steps to realize the \"golden ratio\"<\/strong>\u200c<\/span><\/h4>\n<ol>\n<li>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Accurate load calculation<\/strong>\u200c<\/span><br \/>\n<span style=\"font-family: helvetica, arial, sans-serif;\">Use specialized software (e.g. Carrier HAP or IESVE) to simulate pool evaporation, ventilation requirements and heat loss to avoid equipment selection errors due to empiricism.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Selection of highly integrated devices<\/strong>\u200c<\/span><br \/>\n<span style=\"font-family: helvetica, arial, sans-serif;\">Prioritize the use of 3-in-1 systems for ventilation, dehumidification, and heat recovery (e.g., Calorex Varipac) to reduce plumbing complexity and space occupation.<\/span><\/p>\n<\/li>\n<li>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Allow for redundancy in regulation<\/strong>\u200c<\/span><br \/>\n<span style=\"font-family: helvetica, arial, sans-serif;\">Adding 10%-15% of regulation margin to the airflow design value to cope with unexpected high load scenarios (e.g. pool parties or tournament events).<\/span><\/p>\n<\/li>\n<li>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>Long-term monitoring and iteration<\/strong>\u200c<\/span><br \/>\n<span style=\"font-family: helvetica, arial, sans-serif;\">Installation of IoT sensors to monitor humidity, airflow and energy consumption data, quarterly analysis of the system's energy efficiency ratio (COP), and continuous optimization of operation strategies.<\/span><\/p>\n<\/li>\n<\/ol>\n<hr \/>\n<h4><span style=\"font-family: helvetica, arial, sans-serif;\">\u200c<strong>concluding remarks<\/strong>\u200c<\/span><\/h4>\n<p class=\"marklang-paragraph\"><span style=\"font-family: helvetica, arial, sans-serif;\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 The essence of the \"golden ratio\" of swimming pool ventilation and dehumidification system is to find the optimal solution between environmental safety and energy efficiency through scientific modeling and technological innovation. With the advancement of heat pump technology and intelligent control algorithms, this balance will be more refined and dynamic, providing a solid guarantee for the sustainable development of indoor swimming pools.<\/span><\/p>\n<p><span class=\"katex-display\" style=\"font-family: helvetica, arial, sans-serif;\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 In the design and operation and maintenance of indoor swimming pools, the performance of ventilation and dehumidification systems directly affects the comfort, safety and operating costs of the pool environment. How [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[125],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u6e38\u6cf3\u6c60\u901a\u98ce\u4e0e\u9664\u6e7f\u7cfb\u7edf\u7684\u201c\u9ec4\u91d1\u6bd4\u4f8b\u201d\uff1a\u98ce\u91cf\u3001\u6e7f\u5ea6\u4e0e\u80fd\u8017\u7684\u5e73\u8861\u6cd5\u5219 - \u5965\u5229\u4ed5\uff08\u5e7f\u5dde\uff09\u5eb7\u4f53\u8bbe\u5907\u6709\u9650\u516c\u53f8<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.osaces.com\/en\/youyongchitongfengyuchushixitongdehuangjinbilifengliangshiduyunenghaodepinghengfaze\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6e38\u6cf3\u6c60\u901a\u98ce\u4e0e\u9664\u6e7f\u7cfb\u7edf\u7684\u201c\u9ec4\u91d1\u6bd4\u4f8b\u201d\uff1a\u98ce\u91cf\u3001\u6e7f\u5ea6\u4e0e\u80fd\u8017\u7684\u5e73\u8861\u6cd5\u5219 - 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