{"id":2791,"date":"2025-02-27T19:51:24","date_gmt":"2025-02-27T18:51:24","guid":{"rendered":"https:\/\/jureknawrocki.com\/?p=2791"},"modified":"2026-03-14T08:04:27","modified_gmt":"2026-03-14T07:04:27","slug":"co-poszlo-zle-cz-i","status":"publish","type":"post","link":"https:\/\/jureknawrocki.com\/en\/co-poszlo-zle-cz-i\/","title":{"rendered":"What went wrong. Part I"},"content":{"rendered":"<p class=\"wp-block-paragraph\">From time to time I will describe cases from expertise that I do. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Below is an example of a terrible design and even worse execution of a very good idea to use floor heating of tunnels where a delicate agricultural production is conducted. The area of \u200b\u200bthe floor  heating is ... 0.22 ha, i.e. 2200 m2 ! Huge.. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1008\" height=\"767\" src=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-6.jpg\" alt=\"\" class=\"wp-image-2807\" srcset=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-6.jpg 1008w, https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-6-980x746.jpg 980w, https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-6-480x365.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1008px, 100vw\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1008\" height=\"419\" src=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-5.jpg\" alt=\"\" class=\"wp-image-2808\" srcset=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-5.jpg 1008w, https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-5-980x407.jpg 980w, https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-5-480x200.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1008px, 100vw\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In the design phase, the heat demand for heating the temperature inside all six foil tunnels to 20C was not calculated. This is the first time I have come across a central heating installation project in which the heat demand was not calculated. As a result, the 12 pumps \n in two cascade generates negligible heat power in relation to the demand. As a result, 60 tons of heating oil are used for one and a half heating seasons (which cost about PLN 350,000) in order to maintain the temperature of +20C inside the tunnels, which is crucial for the investor's delicate agricultural production.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The second very good idea was to build in a heat source from a cascade of air heat pumps. Then we have a perfect combination of a floor heater and a heat pump. This is what people are taught in engineering studies. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unfortunately, the contractor built two cascades of six (!) heat pumps each. 26,712 hours passed between the day of signing the work completion protocol and the day of reading the controllers. Let's make an optimistic assumption that the heating season in connection with agricultural production in foil tunnels is half a year. This means that the pumps should have worked 13,356 hours. They should have, but they didn't. For example, pump P1 worked 43,859 hours, and the difference between the extreme values \u200b\u200bof working times was more than 11 times. This is the result of building a cascade of heat or cooling sources in a quantity greater than the optimum, which is usually three. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is what the floor loop distributor mounted horizontally inside the foil tunnels looks like after two seasons of operation. <\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"765\" src=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-1-1024x765.jpg\" alt=\"\" class=\"wp-image-2794\" srcset=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-1-1024x765.jpg 1024w, https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-1-980x732.jpg 980w, https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-1-480x359.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This is how it should look and how it looks in thousands of normal implementations.  <\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"706\" height=\"586\" src=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-4.jpg\" alt=\"\" class=\"wp-image-2800\" style=\"width:431px;height:auto\" srcset=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-4.jpg 706w, https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-4-480x398.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 706px, 100vw\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">An example of mounting a temperature sensor on a valve housing using the proverbial spit.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"521\" height=\"505\" src=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-2.jpg\" alt=\"\" class=\"wp-image-2796\" srcset=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-2.jpg 521w, https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-2-480x465.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 521px, 100vw\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The installation of all heat pumps was designed on the roof of one container. As a result of this solution, the minimum distances from building partitions were not maintained. The heat pumps are placed face to face. For such a configuration of heat pumps, it is not the minimum service space that is crucial. It is the unobstructed freedom of ventilation air flow for heat exchanger ventilation. A conservative solution should be adopted and the minimum distance should be set at 2C, i.e. 160 cm. The measured distance is 45 cm, so it is ~3.5 times smaller.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"641\" height=\"508\" src=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-3.jpg\" alt=\"\" class=\"wp-image-2798\" srcset=\"https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-3.jpg 641w, https:\/\/jureknawrocki.com\/wp-content\/uploads\/Pompa-ciepla-3-480x380.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 641px, 100vw\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Co jaki\u015b czas b\u0119d\u0119 opisywa\u0142 przypadki z ekspertyz, kt\u00f3re robi\u0119. Zatem what went wrong pomi\u0119dzy Ba\u0142tykiem a Tatrami. Poni\u017cej przyk\u0142ad fatalnego zaprojektowania i jeszcze gorszego wykonania bardzo dobrego pomys\u0142u ogrzewania pod\u0142og\u00f3wk\u0105 tuneli z delikatn\u0105 produkcj\u0105 roliczn\u0105. Powierzchnia grzejnika pod\u0142ogowego to &#8230;. 0.22 ha ! W fazie projektu nie policzono zapotrzebowania ciep\u0142a na ogrzanie temperatury wewn\u0105trz [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":2792,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"off","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[126,123,15],"tags":[21],"class_list":["post-2791","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologia","category-obliczenia-wytrzymalosciowe-rur-i-aparatow","category-projekty","tag-hvac"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Co posz\u0142o \u017ale cz.I - Jerzy Nawrocki<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jureknawrocki.com\/en\/co-poszlo-zle-cz-i\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Co posz\u0142o \u017ale cz.I - Jerzy Nawrocki\" \/>\n<meta property=\"og:description\" content=\"Co jaki\u015b czas b\u0119d\u0119 opisywa\u0142 przypadki z ekspertyz, kt\u00f3re robi\u0119. Zatem what went wrong pomi\u0119dzy Ba\u0142tykiem a Tatrami. Poni\u017cej przyk\u0142ad fatalnego zaprojektowania i jeszcze gorszego wykonania bardzo dobrego pomys\u0142u ogrzewania pod\u0142og\u00f3wk\u0105 tuneli z delikatn\u0105 produkcj\u0105 roliczn\u0105. Powierzchnia grzejnika pod\u0142ogowego to &#8230;. 0.22 ha ! 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Zatem what went wrong pomi\u0119dzy Ba\u0142tykiem a Tatrami. Poni\u017cej przyk\u0142ad fatalnego zaprojektowania i jeszcze gorszego wykonania bardzo dobrego pomys\u0142u ogrzewania pod\u0142og\u00f3wk\u0105 tuneli z delikatn\u0105 produkcj\u0105 roliczn\u0105. Powierzchnia grzejnika pod\u0142ogowego to &#8230;. 0.22 ha ! 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