Topsfield Engineering Service provides full thermal design engineering support for your projects under development. Thermal design is a process that involves:

      · Establishment of specific design thermal limits for temperature, fluid flow, and heat flow.

      · Development of a thermal design strategy to achieve a design consistent with those limits and the requirements of the other  disciplines.

      · Thermal and Flow modeling, using network or finite element methods, to develop the design.

      · Experimentation and testing to prove the design.

      · Documentation of the design requirements, strategy, analysis/experimentation work,and design verification test results. For equipment development, where heat flow is a factor, our clients are discovering that thermal design and accurate thermal analysis, early in the design cycle, are essential to successful (on time and within budget) product development.

      We stand ready to support you in executing any or all of the steps in the thermal design process.


      Network modeling is, in fact, a computerized hand calculation in that it uses classical heat transfer/fluid flow correlations and equations. The thermal engineer defines the nodal & fluid lump connections and boundary conditions and the computer then solves the network with ease. Network modeling allows the thermal engineer to focus on the design requirements and not get bogged down in error-prone hand computations or over-simplify the problem and thus miss or ignore significant thermal paths.

      Many space based systems rely on round or space based systems may also include a fluid (or fluids) to transport heat to or from the equipment under design.

      Steady-state thermal model output includes node temperatures, node heat flow details, and temperature profiles. If the model is executed using a time-dependent mode, results include node temperatures and heat stored at selected time steps, end time node heat flow and storage details, and heatup/cooldown plots for selected nodes.

      Network models are usually developed using C&R Thermal Desktop®, a graphical user interface (GUI) for C&R SINDA/FLUINT, the network analyzer, Over the years, C & R Technologies has made significant improvements in the capability of SINDA/FLUINT and it is still possible to add logic to control boundary conditions or include proprietary techniques for heat transfer or fluid flow calculation.

      TES engineers will also work with any other proprietary network modeling codes or finite element codes, as required by our clients.

      With sound modeling, designs are built with a high degree of assurance that they will function, thermally, as expected. The results are:

      · Designs with lower development costs.

      · Reduced design cycle time.

      · No thermal surprises when the equipment is put into service.