5,068 research outputs found
Air and Water Flowrate Optimisation for a Fan Coil Unit in Heat Pump Systems
Full text linkThe degradation in efficiency of auxiliary components in heating/cooling systems when operating at part load is frequently reported. Through the use of variable speed components, the supplied capacity can be reduced to match the required load and hence reduce unnecessary energy consumption. However, for fan coil units, difficulties can arise when optimizing fan and pump speeds at part load. Practically locating optimal water and air flow rates from readily available information and for varying supplied capacities is necessary, in order to reduce the fan coil power consumption. This research attempts to identify whether optimal fan and pump speeds exist for a fan coil unit and how they can be implemented, in a practical manner, in a system control applications. Using an empirical fan coil and pump model, the total power consumption (fan and pump) for different combinations of fan and pump speeds over a range of capacities was calculated. It was observed that, for a given capacity, an optimal combination of fan and pump speeds exists and there was a significant change in power consumption for different combinations of fan and pump speeds supplying the same capacity. A control strategy is described that utilizes a simple fan coil capacity estimation model, coupled with air and water flow rates, along with nominal design data. The pump speed is optimized using PID control to maintain the space temperature at the chosen set-point, which matches the supplied capacity to the required capacity. At set-time intervals, the capacity estimation model is utilized to optimize the water and air flow rates for the required capacity. The control strategy is evaluated, using a full building simulation model for a daily load profile and is compared to two baseline conditions: for no control of the fancoils/pump combination and for PID circulation control of the pump only. The optimal fan and pump speed control resulted in a 43% and 24% decrease in power consumption with compared to the no control baseline and the PID controlled circulation pump strategy, respectively
Going beyond on-pitch success: fan engagement as a catalyst for growth
No full textThis research investigates the case of fan engagement as a strategy for long-term growth for football clubs. Through an exploratory methodology this study gains a
valuable insight into the current perceptions and usage of fan engagement, with a particular focus on social media.
Whilst the subject of social media is
growing in academic journals, there is very
little understanding of how sport organisations are
using this platform. 14 semi-structured interviews with key industry personnel and a fan focus group in addition to a content analysis of the Twitter feeds of 10 Premier
League football clubs was undertaken to offer new insight to the academic conversation in this subject area. The research findings suggest that
clubs need to develop ways to build and create long-term loyalty through fan engagement in
preference to unsustainable growth strategies based exclusively on winning and on-pitch performance.
Since winning is only possible for a select few every season, a strategy that places the fan at the centre of the club will prove beneficial to most clubs at all levels in the long term.
With the incoming financial controls being
implemented across the English football leagues in addition to UEFA’s Financial Fair Play legislation, the
significance of developing long-term profitability has never been more evident.
Those clubs which place Customer Relationship Management (CRM) as an overriding philosophy throughout the organisation and develop social media platforms effectively as part of a CRM strategy are best placed to improve their
understanding of fans and adapt their marketing strategies
to build loyalty and advocacy to the brand, which in time will deliver profitability and long-term growth
Method of Fundamental Solutions with External Source for the Eigenfrequencies of Waveguides
No full text3D Cartesian/Immersed-Boundary Finite-Element Analysis for Heat and Flow Patterns in a Two Roll Mill
No full textDirect Approach to Solve Nonhomogeneous Diffusion Problems Using Fundamental Solutions and Dual Reciprocity Methods
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The Method of Fundamental Solutions with Eigenfunctions Expansion Method for 3D Nonhomogeneous Diffusion Equation
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