CN203475639U - Self-heat-preserving wall body of civil building - Google Patents

Abstract

The utility model discloses a self-heat-preserving wall body of a civil building. The heat-preserving wall body comprises an inner brick wall layer, an outer brick wall layer and a lap joint brick layer, wherein the inner brick wall layer is arranged on the side adjacent to the interior of a building, the outer brick wall layer is arranged on the side adjacent to the exterior of the building. The inner brick wall layer, the outer brick wall layer and the lap joint brick layer are composed of multiple inner wall bricks, multiple outer wall bricks and multiple lap joint bricks respectively. The inner wall bricks and the corresponding outer wall bricks are arranged in parallel and the two ends of each inner wall brick and the two ends of each outer wall brick are provided with the lap joint bricks which are arranged to be perpendicular to the inner wall bricks and the outer wall bricks. The inner brick wall layer, the outer brick wall layer and the lap joint brick layer are used for defining an air layer. According to the heat-preserving wall body of the civil building, through the optimized design of a wall body building envelope, the heat preserving performance of an outer wall is improved under the condition that a traditional building block production mode is not changed. Under the condition that heat preserving materials are not adopted, the outer wall heat transfer coefficient requirement in the southern area can also be met. On one hand, the engineering construction cost is saved and on the other hand, the good heat insulating and preserving effect is achieved and the effect of reducing energy consumption of the building is achieved.

Description

A kind of civilian construction self heat insulation wall

Technical field

The utility model relates to construction engineering technical field, particularly a kind of civilian construction self heat insulation wall.

Background technology

Because building 80% of the energy input that always conducts heat is lost by heat transfer across wall, therefore, the improvement of thermal performance of building envelope has very important significance for building energy conservation.Adopt appropriate space enclosing structure parts and reasonably construction measure can meet the various requirements such as insulation, heat insulation, daylighting, ventilation, both guaranteed indoor good physical environment, reduced again energy consumption, this is the primary condition that realizes building energy conservation.

The energy-saving design of space enclosing structure relate generally to because have exterior wall, roof, door and window, curtain wall etc.Exterior wall is the main body of architectural exterior-protecting construction, and its heat-insulating property directly affects the heat consumption of building, and external wall energy-saving occupies very important position in building energy conservation, and the heat transfer heat consumption of exterior wall accounts for the 23%-34% of building total heat consumption according to statistics.Southern area (Xia Redong cryogenic region, hot summer and warm winter region) residential building, public building have carried out strict restriction to the thermal transmittance limit value of external wall respectively for this reason.Visible enhancing exterior wall thermal property has important function for building energy conservation.

The method that urban architecture is mainly laid heat insulating material by exterior wall improves exterior wall thermal property, but can cause construction cost to increase owing to laying heat insulating material, and this has seriously restricted the popularization of the civilian space enclosing structure power-saving technologies of some rural areas tradition.

Utility model content

Goal of the invention of the present utility model is: for the problem of above-mentioned existence, provide a kind of and do not changing under the condition of traditional brick block production model, the civilian construction self heat insulation wall that can play good heat insulating effect and reduce building energy consumption.

The technical scheme of the utility model technology is achieved in that a kind of civilian construction self heat insulation wall, it is characterized in that: the outer brick wall layer and the overlap joint brick layer that comprise the interior brick wall layer near an indoor side, a close outdoor side, described interior brick wall layer, outer brick wall layer and overlap joint brick layer are comprised of some internal wall bricks, exterior wall tile and overlap joint brick respectively, described internal wall brick is arranged in parallel and is provided with to be arranged vertically with it at its two ends with corresponding exterior wall tile and overlaps brick, and described interior brick wall layer, outer brick wall layer and overlap joint brick layer surround into air layer.

Civilian construction self heat insulation wall described in the utility model, it scribbles respectively dope layer on a described interior brick wall layer side corresponding with outer brick wall layer, the inside wall that contacts with air layer, and the emissivity of coatings of described dope layer is less than or equal to 0.4.

Civilian construction self heat insulation wall described in the utility model, described in it, internal wall brick, exterior wall tile and overlap joint brick are all standing and are putting, and are staggered.

Civilian construction self heat insulation wall described in the utility model, overlaps overlap joint brick two of brick layer respectively near indoor and outdoor described in it.

The utility model is by the optimal design to masonry wall structure, realized and not changed under the condition of traditional brick block production model, the heat-insulating property of exterior wall is improved, in the situation that not adopting heat insulating material, also can meet southern area heat transfer coefficient of outer wall requirement, can save engineering construction cost on the one hand, the effect that can also play good heat insulating effect simultaneously and reduce building energy consumption.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation.

Fig. 2 is Calculation of Heat Transfer process flow schematic diagram of the present utility model.

Fig. 3 is civilian wall heat transfer coefficient (summer) schematic diagram under different emissivity.

Fig. 4 is civilian wall heat transfer coefficient (winter) schematic diagram under different emissivity.

Fig. 5 is civilian wall heat transfer coefficient under different emissivity (excessively season) schematic diagram.

Mark in figure: 1 is internal wall brick, 2 is exterior wall tile, and 3 is overlap joint brick, and 4 is air layer, and 5 is dope layer.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in detail.

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model technology is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction utility model.

As shown in Figure 1, a kind of civilian construction self heat insulation wall, comprise the interior brick wall layer near an indoor side, outer brick wall layer and overlap joint brick layer near an outdoor side, described interior brick wall layer, outer brick wall layer and overlap joint brick layer are respectively by some internal wall bricks 1, exterior wall tile 2 and overlap joint brick 3 form, described internal wall brick 1 is arranged in parallel and at its two ends, is provided with to be arranged vertically with it with corresponding exterior wall tile 2 and overlaps brick 3, overlap joint brick 3 two of described overlap joint brick layer are respectively near indoor and outdoor, described interior brick wall layer, outer brick wall layer and overlap joint brick layer surround into air layer 4, described internal wall brick 1, exterior wall tile 2 and overlap joint brick 3 are all standing and are putting, and be staggered.

Wherein, on a described interior brick wall layer side corresponding with outer brick wall layer, the inside wall that contacts with air layer 4, scribble respectively dope layer 5, the emissivity of coatings of described dope layer 5 is less than or equal to 0.4.

Specific embodiment:

Embodiment builds overview: the high 3.3m of this external wall body of wall, and wide 10.3m, the brickwork that uses is of a size of 240 * 115 * 53mm.Calculating parameter input parameter is as following table:

Calculating parameter input table

Wherein, computational methods flow process as shown in Figure 2.

Through above hypothesis, the diabatic process computational methods of civilian construction self heat insulation wall described above, comprise the heat transfer of air layer body of wall and the heat transfer of overlap joint brick wall body, the heat transfer of described air layer body of wall comprises double teacher: 1. heat passes to exterior wall outside in the mode of composite heat-exchange, 2. heat passes through exterior wall with heat-conducting mode, 3. inner side of outer wall passes to interior wall outside in the mode of composite heat-exchange, 4. heat is in the mode of heat conduction by interior wall, and 5. heat passes to indoor environment in the mode of composite heat-exchange; The heat transfer of described overlap joint brick wall body comprises three phases: 1. heat passes to overlap joint brick wall outer side in the mode of composite heat-exchange, and 2. heat is in the mode of heat conduction by overlap joint brick brick body wall, and 3. heat passes to indoor environment in the mode of composite heat-exchange.

Wherein, the heat transfer of a, air layer body of wall:

1. outside wall surface heat convection, exterior surface of wall and air heat are with complex form heat exchange, and the heat flow density of this process can be calculated with formula (one):

Q=h ₀(t _f0-t _w0) ... (one)

2. exterior wall heat conduction, heat passes through (interior wall is identical with exterior wall computational methods) from exterior wall outer surface in the mode of heat conduction, and the heat flow density of this process can be calculated with formula (two):

$q=\frac{t_{w0}-t_{w1}}{{\mathrm{\δ}}_0/{\mathrm{\λ}}_z}$ ... (two)

3. air space heat exchange, heat passes through air layer in the mode of composite heat-exchange, this process can be regarded the heat transfer free convection in the confined space as, and the air layer in body of wall is vertical wall interlayer, and heat transfer free convection Correlation equations and correlometer formula (three) are as follows:

Grashof:

$\mathrm{Gr}=\frac{\mathrm{g\α}(t_{w1}-t_{w2}){\mathrm{\δ}}_a^3}{V^2}$ ... (four)

Can draw equivalent surface coefficient of heat transfer thus:

$h_e=\frac{{\mathrm{\λ}}_a}{{\mathrm{\δ}}_a}\mathrm{Nu}$ ... (five)

Body of wall radiating surface thermal transmittance:

$h_r=\mathrm{\ϵ}{C}_b\frac{T_{w1}^4-T_{w2}^4}{T_{w1}-T_{w2}}\×{10}^{-8}$ ... (six)

So air layer composite heat-exchange surface coefficient of heat transfer:

H ₁=h _e+ h _r... (seven)

Q=h ₁(t _w1-t _w2) ... (eight)

4. interior wall heat conduction, heat passes through (interior wall is identical with exterior wall computational methods) from inner wall outer surface in the mode of heat conduction, and the heat flow density of this process can be calculated with formula (two):

$q=\frac{t_{w2}-t_{w3}}{{\mathrm{\δ}}_0/{\mathrm{\λ}}_z+{\mathrm{\δ}}_c/{\mathrm{\λ}}_c}$ ... (nine)

5. interior wall face heat convection, body of wall inner surface and air heat are with complex form heat exchange, and the heat flow density of this process can be calculated with formula (ten):

Q=h ₂(t _w3-t _f1) ... (ten)

The heat transfer of b, overlap joint brick wall body:

Overlap joint brick wall inside and outside wall heat exchange design formulas, with the diabatic process of air layer body of wall, is calculated with (ten) according to formula (), and overlap joint brick wall body heat transferring is pressed formula (11) and calculated:

$q\′=\frac{t_{w0}-t_{w3}}{{\mathrm{\δ}}_1/{\mathrm{\λ}}_z}$ ... (11)

C, body of wall average heat transfer:

Can draw the overall coefficient of heat transfer of this body of wall thus:

K=K _ka+K _sb......(12)

$K_k=\frac{q}{t_{f0}-t_{f1}}$ ... (13)

$K_s=\frac{q\′}{t_{f0}-t_{f1}}$ ... (14)

A is the ratio that hollow wall area accounts for whole wall area, m ²/ m ²;

B is the ratio that solid wall area accounts for whole wall area, m ²/ m ²;

Heat exchange is calculated and is adopted trial and error procedure, and tentative calculation is crossed each section of heat flow density error of range request and is controlled in 5%; In above-mentioned design formulas, relevant parameter is as follows:

Q is for passing through air layer body of wall heat flow density, W/m ²

H ₀for exterior wall external surface composite heat-exchange coefficient, W/(m ²k)

T _f0for outside air temperature, ℃;

T _w0for exterior wall outer surface temperature, ℃

T _w1for inner side of outer wall surface temperature, ℃

δ ₀for the thickness of brick, mm

λ _zfor the coefficient of thermal conductivity of brick, W/(m ²k)

H _efor equivalent surface coefficient of heat transfer, W/(m ²k)

λ _afor the coefficient of thermal conductivity of air, W/(m ²k)

ε is the slin emissivity of brick

H ₁for air layer composite surface thermal transmittance, W/(m ²k)

T _w3for interior wall inner surface temperature, ℃

H ₂for body of wall mean thermal transmittance W/(m ²k)

K is body of wall mean thermal transmittance W/(m ²k)

λ _cfor the coefficient of thermal conductivity of cement mortar, W/(m ²k)

Nu is nusselt number

H is air layer height, m

Gr is grashof number

G is local acceleration of gravity, m ²/ s

α is the coefficient of cubical expansion, 1/K

T _w2for interior wall outer surface temperature, ℃

δ _afor air layer thickness, mm

ν is the dynamic viscosity of air under qualitative temperature, m ²/ s

H _rfor radiating surface thermal transmittance, W/(m ²k)

C _bblackbody coefficient, W/(m ²k ⁴)

T _f1for indoor air temperature, ℃;

Q ' is for passing through overlap joint brick wall body heat current density, W/m ²

δ ₁for the length of brick, mm

δ _cfor the thickness of cement mortar, mm.

Result of calculation: as shown in Fig. 3 to 5, as can be seen from the figure, no matter in which, thermal characteristic of wall is good, and (body of wall mean thermal transmittance is about 0.7W/m in season ²k), substantially meet energy-conserving construction wall thermal technology requirement.As can be seen here, the utility model can be saved engineering construction cost on the one hand, the effect that can also play good heat insulating effect simultaneously and reduce building energy consumption.

Claims (4)

1. a civilian construction self heat insulation wall, it is characterized in that: the outer brick wall layer and the overlap joint brick layer that comprise the interior brick wall layer near an indoor side, a close outdoor side, described interior brick wall layer, outer brick wall layer and overlap joint brick layer are comprised of some internal wall bricks (1), exterior wall tile (2) and overlap joint brick (3) respectively, described internal wall brick (1) is arranged in parallel and at its two ends, is provided with to be arranged vertically with it with corresponding exterior wall tile (2) and overlaps brick (3), and described interior brick wall layer, outer brick wall layer and overlap joint brick layer surround into air layer (4).

2. civilian construction self heat insulation wall according to claim 1, it is characterized in that: on a described interior brick wall layer side corresponding with outer brick wall layer, the inside wall that contacts with air layer (4), scribble respectively dope layer (5), the emissivity of coatings of described dope layer (5) is less than or equal to 0.4.

3. civilian construction self heat insulation wall according to claim 2, is characterized in that: described internal wall brick (1), exterior wall tile (2) and overlap joint brick (3) are all standing and putting, and are staggered.

4. according to the civilian construction self heat insulation wall described in claim 1,2 or 3, it is characterized in that: overlap joint brick (3) two of described overlap joint brick layer is respectively near indoor and outdoor.

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