Heat transfer and fluid dynamics 1Laajuus (3 ECTS)

Objective

On completion of the course the student will be familiar with and understand the basic concepts of heat transfer and fluid dynamics. The student will understand how fluid dynamics can be applied to the design of building services engineering networks and their fluid dynamic balancing. The student will also be able to design both open and closed loop piping, using either design diagrams or calculations and, further, be able to take the common pipe fittings into account in the calculations. The student will be able to solve the basic heat transfer and fluid dynamics calculation problems related to building services engineering, and to implement Bernoulli’s equation in HVAC systems. The student will also be able to calculate the pressure losses of both open and closed loop taking also the pipe fittings into account.

Content

Basic concepts of heat transfer and fluid dynamics. Design and fluid dynamic balancing of building services engineering systems. Open and closed loop pipe system design with design diagrams and calculations. Pipe fittings causing resistance and dimensioning criteria for piping. Performance characteristics of pumps and fans. Gravitational flow.

Qualifications

Introduction to HVAC Engineering

Assessment criteria, satisfactory (1)

The student is able to calculate the heat loss of a wall with given thermal conductivity. The student is able to calculate the mass flow rate and volume flow rate with given power demand and temperature difference. He or she is able to calculate the buoyancy in simple problems. The student is able to employ the continuity equation and Bernoulli’s equation in simple problems related to flow. The student is able to calculate the friction loss of a straight pipe and the pressure loss of single resistance with a given friction coefficient. The student is able to determine the correct pipe size by using nomograms. The student is able to explain the principle of fluid dynamic balancing.

Assessment criteria, good (3)

In addition to the requirements for grade (1): The student is able to determine the heat-transfer coefficient using the Moody diagram. The student is able to apply the connection between pressure loss and flow in simple problems. The student is able to balance the flow and pressure loss in HVAC systems and to choose control valves with preset values. The student is able to choose the pipe sizes for a simple gravity radiator system.

Assessment criteria, excellent (5)

In addition to the requirements for grade (3): The student is able to fluid dynamically scale the HVAC systems of a one-family house and to give the performance characteristics of pumps, fans and control valves.