Performance evaluation and energy conservation potential of earth–air–tunnel system coupled with non-air-conditioned building

Kumar, Rakesh; Ramesh, Srikonda; Kaushik, S.C.

doi:10.1016/s0360-1323(03)00024-6

Cited by 91 publications

(32 citation statements)

References 7 publications

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“…Further, effects of ground temperature gradient, surface conditions, moisture content, have also been identified as important design aspects of earth air tunnel heat exchanger (Kumar et al, 2003), along with effect of length, radius of pipe and air mass flow rate (Sodha et al, 1993) on the cooling potential of an underground air pipe system.…”

Section: Introductionmentioning

confidence: 99%

Transient effect of soil thermal diffusivity on performance of EATHE system

et al. 2015

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a b s t r a c tThis paper presents effect of thermo-physical properties of soil on performance of an Earth Air Tunnel Heat Exchanger (EATHE). The analysis has been carried out using a validated three-dimensional, transient numerical model for three different types of soil. The governing equations, based on the k-ε model and energy equation were used to describe the turbulence and heat transfer phenomena, are solved by using finite volume method. Comparisons were made in terms of temperature drop, heat transfer rate and COP of the EATHE system by operating it continuously for 12 h duration. The study reveals that each soil exhibits different rate of heat dissipation and thermal saturation over a period of continuous operation, which adversely affects the performance of EATHE. Dissipation of heat from the EATHE pipes to its surrounding soil and subsequently to the outer subsoil region is mainly found to be depending upon the thermal conductivity of soil; even of their thermal diffusivity is of different order.

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Section: Introductionmentioning

confidence: 99%

Transient effect of soil thermal diffusivity on performance of EATHE system

et al. 2015

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“…In this EAHX model, input parameters' were evaluated using 3-D transient codes for coupled neutronic and simultaneous heat and mass transfer into the soil and the circulating air in Ref. [2]. The proposed algorithm is demonstrated by successfully generating sensitive parameters for an actual heating and cooling potential of an EAHX at Mathura, India.…”

Section: Introductionmentioning

confidence: 99%

A design optimization tool of earth-to-air heat exchanger using a genetic algorithm

et al. 2008

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Advancement in genetic algorithm (GA) optimization tools for design applications, coupled with techniques of soft computing, have led to new possibilities in the way computers interact with the optimization process. In this paper, the concept of goal-oriented GA has been used to design a tool for evaluating and optimizing various aspects of earth-to-air heat exchanger behavior. A new optimization method based on GA is applied as a generative and search procedure to optimize the design of earth-to-air heat exchanger. The GA is used to generate possible design solutions, which are evaluated in terms of passive heating and cooling of building, using a detailed thermal analysis of non air-condition building environment The results from the simulations are subsequently used to further guide the GA search to find the high-energy solutions for optimized design parameters. The specific problem addressed in this study is the sizing of earth-to-air heat exchanger in a non air-conditioned residential building. The developed algorithm is suitable for the calculation of the outlet air temperature and therefore of the heating and cooling potential of the earth-to-air heat exchanger system. This methodology is applicable to a wide range of design optimization problems like choice of building such as green house, solar house, or heating and cooling of buildings by mechanical system. r

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“…However, there are numerous publications that are associated (at least in part) to the current research. For example, a coupled heat and mass transfer model to predict the energy conservation potential of an earth-air heat exchanger system has been developed [19]. Here, passive thermal performance of buildings was considered along with various design aspects of an earth-air-tunnel.…”

Section: Introductionmentioning

confidence: 99%