We make gas heating greenhouses with our own hands

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Many own­ers of sum­mer cot­tages, for sure, would not give up the pos­si­bil­i­ty of har­vest­ing all year round. Unfor­tu­nate­ly, in most Euro­pean regions the cli­mate is such that this desire looks like a utopia. How­ev­er, arrang­ing a reli­able green­house equipped with a pro­duc­tive heat­ing sys­tem can be a solu­tion to this issue. Recent­ly, gas heat­ing of a green­house is con­sid­ered the most com­mon, which is explained by the appear­ance on the mar­ket of mod­ern tech­nol­o­gy — IR emit­ters and heat guns-con­vec­tors.

Classic variant

The tra­di­tion­al approach to the use of gas in order to ensure the opti­mal micro­cli­mate of green­hous­es involved the cre­ation of a ther­mal cir­cuit, the basis of which is a gas boil­er. This method is effec­tive and reli­able, but it is not very suit­able for a small pri­vate green­house, finan­cial invest­ments turn out to be impres­sive, it is nec­es­sary to form com­plex pipe lay­outs, install stop valves for fine tun­ing and adjust­ment of func­tion­ing. In addi­tion, such a method of gas heat­ing involves obtain­ing numer­ous cer­tifi­cates and per­mits, the tech­nique is clas­si­fied as poten­tial­ly dan­ger­ous, and there­fore approvals from reg­u­la­to­ry author­i­ties are required.

As a result, this scheme is rel­e­vant only if we are talk­ing about a large com­mer­cial green­house with an area of ​​​​sev­er­al hun­dred square meters. Then we can talk about the jus­ti­fi­ca­tion of all invest­ments, they are quick­ly com­pen­sat­ed. Cre­at­ing a sep­a­rate ther­mal cir­cuit for a small agri­cul­tur­al struc­ture is only appro­pri­ate if the own­ers use a gas boil­er to heat the main cot­tage, it is pos­si­ble to make a branch to the green­house.

Traditional mobile equipment

Gas heat­ing a pri­vate green­house is more eco­nom­i­cal if the own­ers use portable devices.

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The fol­low­ing mod­i­fi­ca­tions are pre­sent­ed on the mod­ern mar­ket:

  • Heater with open type burn­ers. The design assumes the pres­ence of a ther­mo­stat, a main burn­er and an aux­il­iary device. Both a cylin­der and a line are used as a pow­er source. The flame of the burn­er heats the air, which nat­u­ral­ly begins to rise to the roof, after which it set­tles even­ly, rais­ing the tem­per­a­ture in the sur­face zone, that is, exact­ly where the plants are locat­ed. The main dis­ad­van­tage of the tech­nique is that the com­bus­tion process reduces the oxy­gen con­tent in the air, and this is detri­men­tal to crops. This phe­nom­e­non can be com­pen­sat­ed by equip­ping a sim­ple ven­ti­la­tion sys­tem. Not far from the heater, a hole is punched in the wall with a diam­e­ter of at least 5 cen­time­ters. A PVC pipe is insert­ed into the hole. To pro­tect against insects and rodents, it is rec­om­mend­ed to install a met­al mesh with small cells.
  • Heat­ing with gas con­vec­tors. The instal­la­tion of this tech­nique is car­ried out on the walls, the design implies the pres­ence of a sealed com­bus­tion cham­ber based on steel or cast iron. Inside the cham­ber is the main burn­er, as well as a closed heat exchange cir­cuit. The oper­a­tion of the device is con­trolled by automa­tion, the main or bot­tled gas enters the main burn­er, due to which the inter­nal heat­ing of the body occurs. The heat exchange cir­cuit trans­fers ener­gy inside the green­house. Com­pared to a con­ven­tion­al open heater, this device inde­pen­dent­ly takes in air and exhausts com­bus­tion prod­ucts, that is, the lev­el of oxy­gen in the agri­cul­tur­al build­ing does not fall, and the need for addi­tion­al ven­ti­la­tion pipes is elim­i­nat­ed. The device auto­mat­i­cal­ly cor­rects the tem­per­a­ture in accor­dance with the set val­ues, safe­ty is guar­an­teed by a lock­ing mech­a­nism that cuts off the fuel sup­ply in sit­u­a­tions with drops in thrust or pres­sure. Such a heater is some­times addi­tion­al­ly sup­plied with a fan. Mod­ern­iza­tion increas­es effi­cien­cy, the air in the green­house warms up much faster, but there is a depen­dence on the elec­tric­i­ty sup­ply.

Modern approach

Heat­ing with infrared burn­ers is con­sid­ered the most advanced, gen­tle and eco­nom­i­cal way. The prin­ci­ple of oper­a­tion of infrared tech­nol­o­gy is based on elec­tro­mag­net­ic radi­a­tion pro­duced by heat­ing ele­ments that heat up dur­ing the com­bus­tion of fuel.

See also: do-it-your­self water heat­ing of a green­house.
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Devices are divid­ed into two groups:

  • “Dark” units are equipped with tubu­lar heat­ing ele­ments, the max­i­mum tem­per­a­ture of which is 600 degrees;
  • “Light” devices are equipped with mesh heat­ing ele­ments, or ceram­ic-based plates, the tem­per­a­ture of which can exceed 600 degrees.

Do not for­get to read the mate­r­i­al on heat­ing green­hous­es with your own hands.

The rea­son for this divi­sion into groups is the abil­i­ty of “light” burn­ers to pro­duce light in the vis­i­ble spec­trum, like ordi­nary incan­des­cent lamps. How­ev­er, 60 per­cent of the total heat flux comes from infrared radi­a­tion.

If we con­sid­er the design fea­tures, then the “dark” devices are based on an ele­ment elon­gat­ed in one direc­tion, which is explained by the tubu­lar shape of the heat­ing ele­ment. Addi­tion­al­ly, a pipe is mount­ed for the removal of com­bus­tion prod­ucts. “Light” IR ana­logues do not have their own chim­ney, com­bus­tion prod­ucts are thrown into the green­house, and there­fore it is nec­es­sary to addi­tion­al­ly equip the build­ing with ven­ti­la­tion ducts.

The advan­tage of the tech­nique oper­at­ing in the IR spec­trum is that with its help it is easy to orga­nize local heat­ing zones, to pre­vent the tem­per­a­ture in areas where the most heat-lov­ing crops grow. Prac­tice shows that the devices are most effec­tive when ger­mi­nat­ing seeds that also need an abun­dance of ther­mal ener­gy.

Conclusion

Thus, heat­ing a pri­vate green­house with a gas gun is not the only sce­nario when using this type of fuel. A com­pe­tent approach to the for­ma­tion of the scheme, tak­ing into account all kinds of fac­tors, atten­tion to mod­ern devices — all this will help to estab­lish a sys­tem that will not have weak­ness­es. Tak­ing into account the fact that gas in EU is sig­nif­i­cant­ly cheap­er than elec­tric­i­ty or sol­id fuel, a well-equipped scheme can pay off in a cou­ple of sea­sons.

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