Olson E.R.,Tyco Thermal Controls |
Lorenz R.D.,University of Wisconsin - Madison
IEEE Transactions on Industry Applications | Year: 2010
A methodology for decoupling cross-coupled fields in compact current-sensor designs is presented. The compactness of the current sensor is made possible by using highly sensitive field detectors, such as giant magnetoresistive (GMR) technology, which offers galvanic isolation, small size (∼mm2), and high bandwidth (> 1 MHz). By using known geometric relations between the conductor geometries and locations of the field detectors, cross-coupled magnetic-field signals can be used to extract necessary current signals, as well as separate unknown disturbance fields. This methodology can also be used to simplify the magnetic biasing required of GMR field detectors, including decoupling of the temperature dependence of the biasing magnet. Moreover, the methodology can also be extended to estimate the temperature of the magnet to provide an extra temperature signal for thermal management algorithms. © 2010 IEEE. Source
Liu N.,Tyco Thermal Controls
Proceedings of 2011 International Conference on Modelling, Identification and Control, ICMIC 2011 | Year: 2011
Self-regulating polymer heating cables are widely used in industry and the commercial world. Their applications include process temperature maintenance, frost heave protection, floor heating, and snow-melting. The heating cables automatically adjust their power output to compensate for temperature changes. This paper demonstrates a numerical approach based on a 3D finite element model to evaluate the cable performance in a concrete slab for snow-melting applications. A variety of thermal conditions are investigated to simulate the ambient temperature changes. Experiments were carried out to validate the finite element model. The numerical results and experimental data are compared and presented. © 2011 Shanghai Jiaotong Univ. Source
Jones J.,Tyco Thermal Controls
Health estate | Year: 2010
Jonathan Jones, European product manager at Tyco Thermal Controls, explains the economic and other benefits of using electrically trace-heated single pipe distribution, in place of the more "traditional" flow and return system, for hot water supply. Source
Tyco Thermal Controls | Date: 2011-09-15
A fluid pipeline has a first end and a second end. An elongated heat trace element is aligned and coupled to at least a portion of an outer surface of the fluid pipeline. The outer surface of fluid pipeline carries a first insulation material, wherein the first insulation covers a first portion of the outer surface. The outer surface of fluid pipeline further carries a second insulation material, wherein the second insulation covers a second portion of the outer surface and wherein the second portion of the outer surface is different than the first portion of the outer surface. The first and second insulation materials are configured to cover the outer surface of the fluid pipeline. The fluid pipeline further comprises a third insulation material carried over a second outer surface defined by the cooperation of the first and second insulation materials.
Electrical hard-wired connection kit for heating cables comprising metal grounding screws and nuts, non-metal pipe mounting brackets, metal lock nuts, non-metal grommets, metal and non-metal wire nuts, non-metal heat-shrinkable tubes, non-metal end seals, metal ring terminals, non-metal sealing gaskets and plastic labels. In-line splice kit for heating cables comprising manually operated wire crimps, manually operated braid crimps, non-metal clamp ties, non-metal cable ties, non-metal heat-shrinkable caps and tubes, non-metal end seals, cloth tape, and non-metal mastic strips; splice and tee kits for heat trace cable comprising manually operated wire crimps, manually operated braid crimps, non-metal clamp ties, non-metal cable ties, non-metal heat-shrinkable caps and tubes, non-metal end seals, cloth adhesive tape, and non-metal mastic strips. Plug in power connection kit for heating cables comprising plug-in ground fault equipment protection device, manually operated braid crimp, manually operated wire crimps, non-metal heat shrinkable tubes, nonmetal clamp ties, plastic labels, cloth adhesive tapes, non-metal mastic strips, and non-metal end seals. Parts of heating systems, namely, self-regulating crankcase heater for use in connection with compressors for air conditioners, heat pumps, and air chillers and refrigeration systems. Heat shrinkable end caps of plastic for cables; Heat shrinkable and preformed plastic end seals for heating cable; Plastic labels for identifying heat tracing locations; non-metal end seals for heating cables.