An open question in the study of quasiconvex function is the characterization of the class of functions which are sum of quasiconvex functions. In this paper we restrict attention to quasiconvex radiant functions, i.e. those whose level sets are radiant as well as convex and deal with the claim that a function can be expressed as the sum of quasiconvex radiant functions if and only if it is rad...

Radiant systems have been proven to be an energy-efficient and resource-effective heating cooling solution for buildings. A key feature of a thermally active building system (TABS), one type radiant system, is its ability activate control the thermal mass structure. The advantage this peak load shifting effect by mass, which leads energy saving compared conventional e.g., all-air system. This c...

Radiant floor heating systems provide comfortable indoor thermal environment. Primary air supply can be used to remove contaminants in the space heated by radiant floor. In this study, performance of integrated system impinging jet ventilation (IJV) and was numerically investigated. The lowest capacity 0 W/m 2 gradually increased 50W/m , primary temperature supplied IJV were 14, 16 18°C, respec...

Abstract The presented study deals with univariate and multivariate analysis of the dependencies between factor consequent variables in efficiency a heat pump unit radiant evaporator. strength direction connections these is studied discussed. values correlation determination coefficients were determined equations models describing them derived. considered as valuable tool for heating, ventilati...

Energy-efficient radiant heating and cooling require surface temperature thermal capacity analysis. Simplified pipe modeling is applied to save time resources for numerical analysis when evaluating the system. Therefore, this study investigated distribution of a system using simplified modeling. To do this, steady-state heat transfer simulation was performed Physibel BISCO. The difference betwe...

Abstract Photovoltaic-thermal (PV/T) systems and hydronic radiant floor heating can enhance energy efficiency economic viability. This study investigates their integration through experimental research designs an experiment to test performance under typical winter conditions. The heat pump system achieves average COP of 5.66 photovoltaic power output 107.5 W. underfloor quickly reaches maintain...