An introduction to heat transfer

Introduction to heat transfer

http://mail.seedengr.com/documents/Ventilation%20performance%20prediction%20for%20buildings.pdf

Ventilation performance prediction for buildings: A method overview and recent applications

Vertical-borehole ground-coupled heat pumps: A review of models and systems

Occupant productivity and office indoor environment quality: A review of the literature

The ability to predict both the long-term and short-term behavior of ground loop heat exchangers is critical to the design and energy analysis of ground source heat pump systems. A numerical model for the simulation of transient heat transfer in vertical ground loop heat exchangers is presented. The model is based on a two-dimensional fully implicit finite volume formulation. Numerical grids have been generated for different pipe sizes, shank spacing and borehole sizes using an automated parametric grid generation algorithm. The numerical method and grid generation techniques have been validated against an analytical model. The model has been developed with two main purposes in mind. The first application is used in a parameter estimation technique used to find the borehole thermal properties from short time scale test data. The second application is the calculation of nondimensional temperature response factors for short time scales that can be used in annual energy simulation.

A transient two-dimensional finite volume model for the simulation of vertical U-tube ground heat exchangers

A Simple Model of PV System Performance and its Use in Fault Detection

A preliminary study has been made of the effects of groundwater flow on the heat transfer characteristics of vertical closed-loop heat exchangers and the ability of current design and in-situ thermal conductivity measurement techniques to deal with these effects. It is shown that an initial assessment of the significance of groundwater flow can be made by examining the Peclet number of the flow. A finite-element numerical groundwater flow and heat transfer model has been used to simulate the effects of groundwater flow on a single closed-loop heat exchanger in various geologic materials. These simulations show that advection of heat by groundwater flow significantly enhances heat transfer in geologic materials with high hydraulic conductivity, such as sands, gravels, and rocks exhibiting fractures and solution channels. Simulation data were also used to derive effective thermal conductivities with an in-situ thermal conductivity estimation procedure. These data were used to design borehole fields of different depths for a small commercial building. The performance of these borehole field designs was investigated by simulating each borehole field using the pre-calculated building loads over a ten-year period. Results of these simulations, in terms of the minimum and peak loop temperatures, were used to examine the ability ofmore » current design methods to produce workable and efficient designs under a range of groundwater flow conditions.« less

A preliminary assessment of the effects of groundwater flow on closed-loop ground source heat pump systems

http://depa.fquim.unam.mx/amyd/archivero/DesarrolloModelosMatematicosNo1_14696.pdf

Simon J. Rees

Papers

A transient two-dimensional finite volume model for the simulation of vertical U-tube ground heat exchangers

A Simple Model of PV System Performance and its Use in Fault Detection

A preliminary assessment of the effects of groundwater flow on closed-loop ground source heat pump systems

Modeling snow melting on heated pavement surfaces. Part I: Model development

A three-dimensional numerical model of borehole heat exchanger heat transfer and fluid flow