Ground Source Heat Hump is one of the emerging technic to utilize the reservoir of geothermal energy in Europe. The crucial factor is to find the optimal length of the borehole to successfully design a heating system. The length of the borehole varies depending on the geographical area, the capacity of the heat pump and heat load of the desired building in consideration. Several methods have be...

To address the regional applicability of heat-source tower heat pumps (HSTHPs), a mathematical model HSTHPs was established and experimentally verified. In different thermal zones, seasonal operation characteristics were investigated in winter summer conditions. The results showed that, heating performance factor (HSPF) value cold zone is lowest, but it can reach 2.40 winter, HSPF values hot-su...

a novel mathematical model has been developed to aid the formulation of emulsion explosives. this mathematical model calculated heat of explosion, oxygen balance and raw material cost as a function of explosive ingredients, and the solution of the mathematical model was obtained by a ms excel program. the effects of the different content of nh4no3, nano3, h2o, and span-80 and composite fuel oil...

In this paper, we consider boundary stabilization problem of heat equation with multi-point source. Firstly, a state feedback controller is designed mainly by backstepping approach. Under the controller, exponential stability closed-loop system guaranteed. Then, an observer-based output proposed. We prove resulting using operator semigroup theory. Finally, and controllers are effective via some...

In this paper, thermoacoustic dynamic behaviour patterns of a Rijke tube with a distributed heat source have been investigated. The heat release model consists of a row of distributed heat sources with individual heat release rates. The integrated heat release rate is then coupled with the acoustic perturbation for thermoacoustic analysis. Unlike the conventional approach utilizing the Galerkin...