This work proposes an innovative approach to the ground source evaluation for heat pump systems. The initial characterization of the soil (e.g. thermo-physical properties, temperature.) is integrated with classical considerations about HVAC design. In particular, we propose to analyze the viability of a ground source project through the evaluation of its final operative performances. The achievable savings with respect to alternative technologies become the key-parameter for project viability and system design. The proposed methodology aims to investigate the best level of exploitation of the ground source according to soil thermo-physical properties, local external climate, building thermal load, and back-ups efficiency. Through a plain test case, we show how the utilization of the sole GSHP technology, even if technically feasible, might not be the best design solution: indeed, the large number of required ground heat exchangers could make the project unfavorable. On the contrary, a proper synergy among GSHP and back-up generators leads to notable energetic and economic benefits, ensuring higher energetic performances, lower installation costs, and a sustainable exploitation of the ground-source.
A novel evaluation criterion for GSHP systems based on operative performances
CONTI, PAOLO
2015-01-01
Abstract
This work proposes an innovative approach to the ground source evaluation for heat pump systems. The initial characterization of the soil (e.g. thermo-physical properties, temperature.) is integrated with classical considerations about HVAC design. In particular, we propose to analyze the viability of a ground source project through the evaluation of its final operative performances. The achievable savings with respect to alternative technologies become the key-parameter for project viability and system design. The proposed methodology aims to investigate the best level of exploitation of the ground source according to soil thermo-physical properties, local external climate, building thermal load, and back-ups efficiency. Through a plain test case, we show how the utilization of the sole GSHP technology, even if technically feasible, might not be the best design solution: indeed, the large number of required ground heat exchangers could make the project unfavorable. On the contrary, a proper synergy among GSHP and back-up generators leads to notable energetic and economic benefits, ensuring higher energetic performances, lower installation costs, and a sustainable exploitation of the ground-source.File | Dimensione | Formato | |
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