Master thesis – Detecting leaking valves

Job title:

Master thesis – Detecting leaking valves

Company

FlaktGroup

Job description

Every day, you breathe in over 20,000 liters of air and spend an average of 90% of your time indoors. Indoor ventilation solutions affect everyone – whether you see our products or not. FläktGroup is a market leader in innovative and energy-efficient indoor climate solutions, which ensure comfort, safety and performance while reducing the carbon footprint. We have been setting the technical standard for over 100 years and with our broad product portfolio we can meet the most comprehensive customer requirements. FläktGroup is owned by Triton and has its headquarters in Germany. We have approximately 4,000 employees worldwide, with production facilities in Europe, Asia and the United States.
Together We Create Excellence. For Life. Read more about us atAbout our function
At R&D, we work to drive the development of our products in ventilation. In Jönköping, we are responsible for the development of air handling units and chilled beams, which means that expertise, product development and a large part of the manufacturing of the products take place here. Our function consists of teams in mechanical design, control and regulation, laboratory and technology development, and we have, among other things, one of Europe’s largest and most advanced laboratories.General backgroundIn an AHU, the heat recovery system is the first in line of components that are used to heat the incoming outdoor air, but if the recovered heat is not enough, additional external heating is needed. External heating is sometimes provided from a hydronic heating system via an air coil in which heat is transferred from the liquid to the incoming air stream. The liquid side of the air coil is made up of copper tubes while the air side is made up of aluminum fins, whereof the area of the fins in total is much larger than the total area of the copper tubes due to the limited heat capacity of air in relation to liquid.As the available capacity in the hydronic heating system typically is much larger than the capacity that is required to heat the air stream, the amount of heat that is transferred in the air coil must be limited. At the same time, the required heating capacity varies, depending on outdoor air temperature, amount of recovered heat, user demand etc., which means that the transferred heat continuously needs to be adjusted to the current conditions. This is typically done with the means of control valves that either adjust the inlet temperature at the liquid side of the coil by mixing the coil outlet stream with the coil inlet stream, or by adjusting the flow rate of liquid through the coil.Project backgroundAs indicated in the background, if the demand for external heat in the AHU is zero, the valve should close, and no heat should then be transferred from the hydronic system to the air stream. However, a common error of valves is leakage, which can occur anytime during its life-time, and the reason could be both mechanical or electronical. Typical mechanical errors can be plunger blockage caused by small particles, build-up of limestone or magnetite in the valve seat, damage on sealings or plunger due to cavitation etc., broken shafts or misalignment between seat and plunger. Typical electronical errors could be damaged actuator (to gears or electronics), wrongly installed actuator resulting in that the end position does not match the closed position of the valve, power failures, force deficits etc.Nevertheless, any of the errors above will cause the valve to leak which means that energy will be used even though there is no demand. Since an AHU typically is equipped with both heater and cooler, any leaking valves will be automatically compensated by an increased operation of the other unit which means that the energy waste will double without any easy ways to identification.Project descriptionThe project aims to develop and evaluate different technological features to detect leaking valves in the application of heating and cooling in AHUs. Several ideas have already been proposed from FläktGroup and part of the work includes summarizing, structure and describing, and further, to test and validate the concepts in our laboratory. An appropriate background of the project members is in mechanical, energy or mechatronics on a master’s degree level.Time planThe project will start after agreement between the students and us.Our promiseIt is simple for us. To be the leaders in air technology, our technical development and our dedicated employees are central. FläktGroup Sweden AB has about 750 employees, and we have production and development in Jönköping and Järna and 16 sales offices in different locations across Sweden. We offer exciting challenges in an international environment. Specialists and generalists work here in areas such as sales, development, production, IT, logistics, marketing and finance. At FläktGroup, the cooperation between our knowledgeable employees in several professional areas is a strength. Our culture is characterized by teamwork and entrepreneurship, where our everyday life is about an ambitious and flexible attitude. We help each other to find the best solution, no matter what challenges we encounter. Both in our work and for our customers.
Together We Create Excellence. For life.Additional informationThis bachelor thesis must be written in English. In your application you send in your CV and a motivation to why you would like to do this project in collaboration with us.If you have any questions you are welcome to contact Mattias Gruber, Global Technology Director at mattias.gruber@flaktgroup.comLast application date is the 24th of November.Varje dygn andas du in över 20 000 liter luft och spenderar i genomsnitt 90% av din tid inomhus. Inomhusventilationslösningar påverkar alla – oavsett om du ser våra produkter eller inte.FläktGroup är marknadsledande av innovativa och energieffektiva lösningar för inomhusklimat, som säkerställer komfort, säkerhet och prestanda samtidigt som vi minskar klimatavtrycket.
Vi har satt den tekniska standarden i över 100 år och kan med våra breda produktportfölj möta de mest omfattande kundkraven. FläktGroup ägs av Triton och har huvudkontor i Tyskland. Vi har cirka 4 000 anställda över hela världen, med produktionsanläggningar i Europa, Asien och USA.

Expected salary

Location

Jönköping

Job date

Thu, 24 Oct 2024 23:38:07 GMT

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