Heat and water vapour transfer in a greenhouse with an underground heat storage system part II. Model

Boulard, T.; Razafinjohany, E.; Baille, Alain

doi:10.1016/0168-1923(89)90043-9

Cited by 24 publications

(14 citation statements)

References 2 publications

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“…On basis of a former work on a greenhouse solar storage similar to ours [2], we hence developed an explicit numerical model [7] which simultaneously accounts for both phenomena, as well as for frictional losses and water infiltration and flow along the tubes. It further allows for control of air flow direction as well as for flexible geometry (inhomogenous soils, diverse border conditions, use of symmetries or pattern repetitions for runtime economy, see Fig.…”

Section: Numeric Simulationmentioning

confidence: 99%

Cooling and preheating with buried pipe systems: monitoring, simulation and economic aspects

Hollmuller

Lachal

2001

Energy and Buildings

111

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KeywordsEarth-channel, buried pipe system, sensible and latent heat exchanges, preheating / cooling of air. AbstractOn basis of extensive monitoring and simulation work, we examine the fundamental difference between winter preheating and summer cooling potential of buried pipe systems under Central European climate, as well from an energetic as from an economic point of view. Care is taken to account for exhaustive energy balances, taking into account sensible and latent heat exchanges, as well as diffusion through soil.

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Section: Numeric Simulationmentioning

confidence: 99%

Cooling and preheating with buried pipe systems: monitoring, simulation and economic aspects

Hollmuller

Lachal

2001

Energy and Buildings

111

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“…The transfer of heat between the air and the casing can be expressed by the following relationship:

P_{air, tub} = S_{t u b} h_{c} (T_{a i r} - T_{t u b}) .

…”

Section: Model Of the Heat Exchanger Air‐groundmentioning

confidence: 99%

Contribution to the Study of the Reduction of Energy Consumption through the Exchanger Coupled Conventional Air‐Ground‐Air Conditioner. Application to the Building

Benhamza

Brima

Houda

et al. 2017

Heat Trans. Asian Res.

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In this study, a new method of using the earth‐air heat exchangers to reduce energy consumption in buildings is discussed. The idea is to couple the EAHE with the condenser of a residential air conditioning system to enhance the effectiveness of the latter. Under the climatic conditions of high temperature in summer (south‐eastern region of Algeria), which can sometimes exceed 50 °C, what makes the heat exchange between the air conditioner and the external environment very difficult in addition to the problem of thermal comfort and the cost of energy consumption. Conducting a simulation by the TRNSYS software that allows to couple the model of the EAHE with the condenser of a residential air conditioner and connect the system with a building. The results show a clear reduction in the energy consumed by this system in connection with the direct use of the air conditioner and increase air conditioning efficiency, coefficient of performance, and energy efficiency rating. In this paper the Hollmuller model was ameliorated and the obtained results are in concord with it. The system is capable of resolving the problem of mal cooling of buildings by air conditioners under critical climate conditions, in addition to lowering the heat output of the condenser, and reducing its effect on the environment.

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“…Other ones represent several parallel running pipes, with or without possibility to treat more complicated cases than steady flow rate, homogenous and laterally adiabatic soils, or sole sensible heat exchange (Gygli and Fort [29], Boulard and al. [30], Gauthier and al. [31], De Paepe [32]).…”

Section: Numerical Modelsmentioning

confidence: 99%

Air–soil heat exchangers for heating and cooling of buildings: Design guidelines, potentials and constraints, system integration and global energy balance

Hollmuller

Lachal

2014

Applied Energy

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Air-soil heat exchangers for heating and cooling of buildings are analyzed under various aspects.Based on the analytically resolved case of a constant airflow subject to sinusoidal temperature input, we start by deriving climate independent design guidelines, for dampening of the daily and/or the yearly temperature oscillation. In a second step, constraints and potential of buried pipe systems are analyzed for the case of a typical Central European climate, for which the constraint between climate and comfort threshold induces a fundamental asymmetry between preheating and cooling potential. Finally, it is shown that the net yield of an air-soil heat exchanger has to take into account more than the mere input-output temperature differential. Keywordsair-soil heat exchanger, earth-air tunnel, buried pipe system, passive cooling and heating.

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Heat and water vapour transfer in a greenhouse with an underground heat storage system part II. Model

Cited by 24 publications

References 2 publications

Cooling and preheating with buried pipe systems: monitoring, simulation and economic aspects

Cooling and preheating with buried pipe systems: monitoring, simulation and economic aspects

Contribution to the Study of the Reduction of Energy Consumption through the Exchanger Coupled Conventional Air‐Ground‐Air Conditioner. Application to the Building

Air–soil heat exchangers for heating and cooling of buildings: Design guidelines, potentials and constraints, system integration and global energy balance

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