Waterfront Hotels’ Chillers: Energy Benchmarking and ESG Reporting

Chillers consumes the largest amount power in subtropical hotels. To monitor chillers’ power usage is of critical importance in energy control. This study attempted to establish the benchmark of electricity usage of hotel chillers and elucidate how the benchmarking results can be integrated with the various types reports for monitoring purposes. A survey of 20 waterfront hotels in the city of Greater Bay Area was conducted and 13 complete samples were used in the analysis. Multiple regression with selected 12 parameters—outdoor temperature, solar radiation, wind speed, cooling degree days, room occupancy, number of employees, service types, and unequally sized chillers were employed. The investigation found that the mean electricity usage of a chiller is 118 kWh/m2 on an annual basis for a deluxe waterfront hotel. The analysis excluded air-conditioned floor area, an exploratory variable, as the valid factor in the chiller’s electricity usage. While the overall R2 of the modeling equation for the whole year was limited to 0.76, the explanatory power of equations for humid spring and deep summer reached 80%. Hoteliers may harness this exercise as a reference to monitor and report the performance of key energy production facility per the Environment, Social, and Governance (ESG) guide.

Quasi-analytical solutions of a turbulence-modeling equation on the robustness of decaying homogeneous turbulence

The present study introduces third-order quasi-analytical solutions of a turbulence-modeling equation, where the standard [Formula: see text] model equation is used because this model is commonly and widely used in engineering applications. These quasi-analytical solutions describe the robustness of decaying homogeneous turbulence. In the present study, decaying homogeneous turbulence influenced by a weak fluid acceleration of mean flow, which is equivalent to the small strain of the mean flow, is considered. Here, the small strain of the mean flow only slightly affects the anisotropy of the decaying homogeneous turbulence, as shown in previous experiments. Simplified governing equations are derived from the governing equations of the turbulence modeling by introducing the conditions of the small strain. Here, two nondimensional functions are introduced in order to describe the influence on the turbulent kinetic energy and its dissipation using decay laws of the turbulent kinetic energy and its dissipation. Three constants included in the quasi-analytical solutions could be obtained using observable parameters.

Brief modeling equation for metal-oxide; TGS type gas sensors

The main aim of this research is to propose a mathematical equation in order to reduce the model parameters based on temperature, humidity and gas density variation in metal-oxide semi-conductive sensors. Also the Arduino based Designed E-nose with the capability to change the temperature and humidity is used to obtain the real sensor?s response in various conditions. The sampling procedure consists of three sectors: fixed temperature and fixed humidity, variable temperature and fixed humidity, fixed temperature and variable humidity, which are stored in Excel software and analyzed with MATLAB. The output response is based on combination of First-Order Plus Dead Time (FOPDT) which has the Minimum Parameters system (MPS) to investigate the behavior of the sensors. Finally, after evaluating the models with the real sensor response and bi-sentence exponentials, it is suggested that the MPS model introduces fewer and simpler parameters, which helps to simulate the sensor?s behavior more accurately and consequently in order to draw a better short response.

УТИЦАЈ ЉУДСКОГ КАПИТАЛА НА ПОСЛОВНЕ ПЕРФОРМАНСЕ ХОТЕЛСКИХ ПРЕДУЗЕЋА У СРБИЈИ

In a knowledge-based economy, the success, growth and development of hotel companies relies in a large extent on knowledge, since employees are directly involved in the process of service production and consumption. The results of numerous studies demonstrate the impact of human capital on business performances, so management must invest and improve human capital in order to create differentiated products / services and ensure a stable competitive position. The main goal of the research is to analyze the interdependence of human capital components and business performance of the hotels in Serbia. The research results confirm the influence of human capital on the non-financial performance of hotel companies. In order to test the structural relationships between variables, reliability analysis, factor analysis and structural modeling equation are employed.

Interplay between sensation seeking and risky alcohol drinking in Mexican adolescents: An structural modeling equation approach.

Alcohol drinking represents one of the most important public health problems in adolescents. One axis of analysis of the correlates that affect alcohol consumption in adolescents is personality traits. In particular, sensation seeking maintains a consistent relationship with consumer behaviors. The objective of this research was tested in a structural equation model to show the structural effect of sensation seeking on risky alcohol drinking. The sensation seeking inventory (Palacios, 2015a) was used and alcohol drinking was measured with a survey of a sample of 550 Mexico City youth between 14 and 23 (M= 16.88; SD= 1.3) years old The results indicated the factorial validity of alcohol drinking in this sample. The structural equation modeling analyses suggested sensation seeking is a significant predictor for alcohol drinking behavior. The discussion analyzes the influence of sensation seeking on alcohol drinking and suggests implications for interventions.

Forward displacement analysis of a 3-RPR spherical parallel mechanism

The forward displacement analysis of spherical parallel mechanisms is a nonlinear problem and has attracted the attention of many researchers. A method is proposed to analyze the forward displacement of a 3-RPR spherical parallel mechanism. Firstly, based on spherical geometry and spherical trigonometry theory, a mathematical model is derived for the forward displacement analysis of the spherical parallel mechanism. After simplifying the mathematical model, the kinematical equations are then solved using the resultant elimination method. Using this method, one can obtain the three variables representing the position and pose of the moving platform directly. Finally, a numerical example is presented and Autodesk Inventor software is used to verify all the real solutions. The method of mathematical modeling, equation simplification, resultant elimination presented in this paper can be extended to solve similar problems effectively.