  Employing Coulomb-coupled systems, we demonstrate a cryogenic non-local
refrigeration engine, that circumvents the need for a change in the energy
resolved system-to-reservoir coupling, demanded by the recently proposed
non-local refrigerators. We demonstrate that an intentionally introduced energy
difference between the ground states of adjacent tunnel coupled quantum dots,
associated with Coulomb coupling, is sufficient to extract heat from a remote
target reservoir. Investigating the performance and operating regime using
quantum-master-equation (QME) approach, we point out to some crucial aspects of
the proposed refrigeration engine. In particular, we demonstrate that the
maximum cooling power for the proposed set-up is limited to about $70\%$ of the
optimal design. Proceeding further, we point out that to achieve a target
reservoir temperature, lower compared to the average temperature of the current
path, the applied voltage must be greater than a given threshold voltage
$V_{TH}$, that increases with decrease in the target reservoir temperature. In
addition, we demonstrate that the maximum cooling power, as well as the
coefficient of performance deteriorates as one approaches a lower target
reservoir temperature. The novelty of the proposed refrigeration engine is the
integration of fabrication simplicity along with descent cooling power. The
idea proposed in this paper may pave the way towards the realization of
efficient non-local cryogenic refrigeration systems.
