Single pile and double pile energy storage

Can energy piles be used as ground heat exchangers?

Energy piles offer a promising and eco-friendly technique to heat or cool buildings. Energy piles can be exploited as ground heat exchangers of a ground source heat pump system. In such application, the energy pile and its surrounding soil are subjected to temperature changes that could significantly affect the pile–soil interaction behaviour.

What is an energy pile?

Energy piles, also called thermo-active piles, are an alternative solution for heating and/or cooling needs. Energy piles are double purpose structures that allow transferring the loads from the superstructure to the soil and that integrate pipe circuits allowing heat exchange between the pile and the surrounding ground.

Why do buildings need a group of energy piles?

Adjacent energy piles The heat transfer capacity of a single pile is usually insufficient to cover the heating and cooling loads of a building. Thus, buildings require the activation of a group of piles to meet the thermal loads.

Can energy piles be used for underground energy exchange?

Energy piles, which are combinations of BHEs with pile foundations, could be used for underground energy exchange without the need for drilling holes [ , , ]. Energy piles have been combined with ground source heat pump (GSHP) systems for building heating or cooling for years [ 33 ].

Can a multi-objective optimization improve the dual performance of energy pile systems?

It is concluded that a multi-objective optimization is highly recommended to enhance the dual performance of an energy pile system coupled with a heat pump using the 4E evaluation criteria (energy, exergy, economy, and environment) while ensuring the safety of the foundation under thermal cyclic loads. 1. Introduction

Do energy piles need seasonal thermal storage?

Unbalanced operation of energy piles, where more heat is being extracted than rejected, in some cases may lead to a significant decrease in long-term energy performance. Therefore, to maintain stable operation of energy piles in a long-term perspective, consideration of seasonal thermal storage may become feasible.