Рекуператор. Плюсы и минусы. Чего больше?!

Everything in this world has more than just positive properties. And sellers always have a rule: "either good or nothing." Therefore, finding information about the true qualities of things is not easy, but it is possible. So, we'll try to figure out: Is a recuperator as economical as it's made out to be? What's the relationship between excessive noise and useful performance? What harm can this device do to your health? Let's do the math: House area: 52 square meters Volume: 130 cubic meters Temperature difference: 30 degrees Heat capacity of air: 1.3 kJ/m3 1 kilojoule = 0.0002777 kilowatt hours 1.3 kJ (1 cubic meter of air) = 0.0003611 kWh 130 x 0.0003611 x 30 = 1.4 kW at -8°C/hour 1.4 kW x 24 = 33.6 kW/day without heat recovery Flow rate in a 125 mm duct with a volume of 130 cubic meters is 3.6 m/sec Real efficiency 50%. Total savings of 17 kWh. The heat recovery unit emits 17 kWh. Now let's look at what happens when two people live together. One person needs 30 cubic meters per hour, two people need 60 cubic meters. Let's say they emit these 60 cubic meters without heat recovery, and they lose the same 17 kWh. Now let's look at how the flows are distributed. For living spaces, it's one times the volume, for the kitchen, three times, and for bathrooms, four times – this is according to the standards. The system is clearly balanced, but it's poorly balanced in any case. A small bedroom has a volume of 15 cubic meters. Two people sleep there, and they need at least 40 cubic meters for a restful state. But the balance, according to air exchange rate standards, is three times lower. Air shortage. Which is exactly what we observed. We had to open the windows, even at speed 1. At speed 4, the experiment failed. It's impossible to sleep. The noise. It prevents you from falling asleep through the diffuser. Well, never mind the noise. There's another problem here. If we supply 40 cubic meters to the bedroom, then we need another 40 to the other, 90 to the kitchen, 40 to the living room, 10 to the hallway (I estimated it based on the settings), for a total of 220 cubic meters. We won't be constantly adjusting the diffuser flow rate. So, by emitting 220 cubic meters, we'll lose more than 34 kW. An hour per day, and 220 x 0.0003611 x 30 x 24 = 57 kW. Minus the efficiency of the recuperator, 28 kWh ended up in the street. And with two of us, we had to throw away 17. Let's assume we forgot to close a window somewhere and threw away the same 28 kWh. So what? We lost exactly the same amount, but we don't have to deal with noise, extra space, unremovable dirt, and we don't have to pay for our troubles. If four people live in the house, then according to calculations (assuming we remember to close the windows), the presence or absence of a recuperator doesn't provide any operational benefit. The cost of the device itself, the height of the floors and ceilings where the ventilation ducts need to be hidden, the cost of the ventilation system, noise, dirt, and health risks are all factors. A dubious savings. Conclusion: don't bring a recuperator into your home. A completely useless undertaking. The benefit you'll receive will have all the hallmarks of a tweaked result. You'll start recording your electricity meter readings, but you won't notice how you've started chasing your family for turning off a light bulb at the wrong time. #Heatpipe#heatrecuperator#house#savings#efficiency#energy#inexpensiveheatrecuperators#warmair#ventilation#houseinFinland#airexchange#energyloss#temperature#kilowatts#ventilationsystem#errors#diffuser#exhaustdiffuser#supplydiffuser#heating#dryingcabinet#duct#pipes#kW#fan#filter#losses#CO2 Thanks for watching! Website: http://www.teplowoda.ru/ Facebook:   / teplowoda1   VK: https://vk.com/club77517367 Website: http://www.teplowoda.ru/ VK: https://vk.com/club77517367 Telegram: https://t.me/teplowoda Facebook:   / teplowoda1   Zen: https://dzen.ru/id/5fd8d6670e30e806cd... Rutube: https://rutube.ru/channel/30591681/