The feasibility of zero carbon emission plants for heating, air conditioning and domestic hot water (DHW) supply, is analyzed, with respect to conventional plants, for a new residential building complex to be constructed, in Northern Italy. Two zero carbon plants are considered: the first is composed of air-to-water heat pumps for space heating and cooling, PV solar collectors, air dehumidifiers, thermal solar collectors and a wood pellet boiler for DHW supply; in the second, the air-to-water heat pumps are replaced by ground-coupled heat pumps. The conventional plant is composed of a condensing gas boiler, single-apartment air-to-air heat pumps, and thermal solar collectors. The economic analysis shows that both zero carbon plants are feasible, and that the air-to- air heat pumps yield a shorter payback time. The exergy analysis confirms the feasibility of both plants, and shows that the ground-coupled heat pumps yield a higher exergy saving.

Economic and exergy analysis of alternative plants for a zero carbon building complex

ZANCHINI, ENZO
2011

Abstract

The feasibility of zero carbon emission plants for heating, air conditioning and domestic hot water (DHW) supply, is analyzed, with respect to conventional plants, for a new residential building complex to be constructed, in Northern Italy. Two zero carbon plants are considered: the first is composed of air-to-water heat pumps for space heating and cooling, PV solar collectors, air dehumidifiers, thermal solar collectors and a wood pellet boiler for DHW supply; in the second, the air-to-water heat pumps are replaced by ground-coupled heat pumps. The conventional plant is composed of a condensing gas boiler, single-apartment air-to-air heat pumps, and thermal solar collectors. The economic analysis shows that both zero carbon plants are feasible, and that the air-to- air heat pumps yield a shorter payback time. The exergy analysis confirms the feasibility of both plants, and shows that the ground-coupled heat pumps yield a higher exergy saving.
T. Terlizzese; E. Zanchini
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/102686
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