Energy design for dense neighborhoods: One heat pump rejects heat, the other absorbs heat from the same loop

Abstract

a b s t r a c tThis paper documents the joint performance of heat pumps that are served by a common loop buried in the ground, and which operate simultaneously: one heat pump absorbs heat from the buried loop whereas the other one rejects heat. A background flow is circulated in the underground loop even when the two heat pumps are not operating. The objective is to determine the performance and the manner in which it is affected by the way in which the two heat pumps are connected to the loop. The performance measures are the heat transfer rates into and out of the heat pumps, and the total pumping power required by the assembly. The paper documents the individual performance of the heat pumps, and their relative performance, which is the ratio of heating absorbed by one pump to the heating rejected by the other pump.

Current trends in constructal law and evolutionary design

“…The problem was made closer to real‐life applications by considering assemblies of heat pumps of different sizes . As the heating requirements of buildings may differ from one to the other, in Almerbati, Lorente, and Bejan, we considered an underground heat exchanger connecting one heat pump that rejected heat to the stream while the other heat pump absorbed heat from the same stream. The case was developed further with the objective of modeling how a data center should be cooled while heating neighboring buildings.…”

Measurement and Verification of Integrated Ground Source Heat Pumps on a Shared Ground Loop

“…Energies 2020, 13, 1752 3 of 24 As multiple heat pumps with different demands in different buildings are attached to the shared ground loop, Alavy et al [12] mentioned that the load imbalance between the heating and cooling demands of ground heat pumps sharing a common ground loop would eventually result in longer ground heat exchangers to meet peak heating and cooling loads. Therefore, intelligent combinations and configurations of heating-dominant buildings and cooling-dominant buildings [13,14] can reduce the length of the required ground loop, and the total costs as well.…”

“…W hw (t)dt + t 1 W glp (t)dt (2) COP cs = t 1 . q s (t)dt − t 1 W ch (t)dt t 1 W ch (t)dt + t 1 W glp (t)dt(3)Energies 2020,13, 1752 …”