earth-to-air heat exchanger

The performance of a passive heating system was evaluated as part of design works for the project of an office building. The passive heating system incorporates an array of buried pipes together with a solar chimney. The solar chimney collects solar energy, heating fresh air and pulling it from an array of buried pipes. The array of buried pipes was used as an open loop earth-to-air heat exchanger and air circulation inside pipes is due to the action of the solar chimney. We studied the heating fractions due to the solar chimney and to the buried pipes.

Earth-to-air heat exchangers are energy-efficient systems that use the ground for cooling in summer and heating in winter. Design, simulation and planning tools are available in the market, and earth-to-air heat exchangers are well-accepted in the built environment. Furthermore, there is a wide knowledge on their performance in operation. Based on long experiences in the design and operation of earth-to-air heat exchangers, pre-defined operation strategies are applied in ventilation concepts.

An Earth-to-Air Heat Exchanger (ETAHE) uses the ground’s thermal storage capacity to dampen ambient air temperature oscillations by delivering the outdoor air to the indoors through a horizontally buried duct. Most ETAHE simulation models assume the airfl

An Earth-to-Air Heat Exchanger (ETAHE) is a low energy cooling and heating technology for buildings. It uses the ground’s thermal storage capacity to dampen ambient air temperature oscillations by delivering outdoor air to indoor through a horizontally bu