Assessment of energy savings and indirect reduction of CO2 emissions by vertical gardening

Анотація

In the study, the formation of the prerequisites for sustainable development is considered, taking into account the safety factor. Thanks to the introduction of green building technologies, preconditions are being created for improving human security in an urbanized environment both at the stage of the production process (from the manufacture of building materials and their disposal and during construction work), and during the operation of already constructed buildings. It is shown that one of the effective ways to increase comfort and safety in the construction industry and in any urban environment is the vertical gardening of buildings. The field studies of the “cooling effect” of the vertical gardening of buildings carried out in the previous work showed an increased cooling effect compared to horizontal gardening. When calmness for gardening with Virginia creeper (Parthenocissus), the value of the "cooling effect" is 1.23 K. Based on this value, amendments are made to the formula for determinationof the dependence of the cooling effect on wind speed. The energy savings and indirect reduction of CO2 emissions from the cooling effect of vertical gardening for various types of fuel in the warm season are calculated. Saving cold from the wall with a minimum (in Ukraine) heat transfer resistance of 3.3 m2 K/W (overall heat transfer coefficient U = 1 / 3.3 = 0.303 W/(m2·K) ) is 8083 J / m2. The indirect (at the energy source) reduction in CO2 emissions for coal combustion is 632 g / m2, and for gas – 372 g / m2. For comparison, at gardening with perennial ryegrass (Lolium perenne) of a roof with minimum (for Ukraine) heat transfer resistance 6 m2 K / W (overall heat transfer coefficient U = 1 / 6 = 0.167 W/(m2·K) ), we have the saving of cold 3620 J / m2. The indirect (at the energy source) reduction in CO2 emissions for coal combustion is 283 g / m2, and for gas – 167 g / m2. The results show the feasibility of using vertical gardening to increase the energy efficiency of buildings and reduce greenhouse gas emissions from heat generators.

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