Agrartechnik Hohenheim 1 ASABE ILES VIII Brazil: September 1 st, ) 1)University of Hohenheim, Stuttgart, Germany 2)Cairo University, Giza, Egypt M. Samer 1), H. Grimm 1), M. Hatem 2), R. Doluschitz 1), T. Jungbluth 1) Spreadsheet Modeling to Size Dairy Sprinkler and Fan Cooling System

Agrartechnik Hohenheim 2 Contents 1. Introduction 2. Materials and Methods 4. Conclusions 3. Results and Discussion 3.2 Mathematical Model 3.3 Computer Software 3.1 Electronic Spark Map 3.4 Validation and Evaluation 5. Summary 6. Perspective

Agrartechnik Hohenheim 3 Introduction Skin and rectal temperature, and respiration rate of dairy cows increase with the increasing of the ambient temperature Therefore, installing a cooling system is highly recommended for dairy farms located in hot climates When the temperature exceeds the upper critical temperature (25 o C) a great degree loss in milk production occurs

Agrartechnik Hohenheim 4 Introduction Figure 2: Cooling system components (Harner et al., 1999) Figure 1: Typical sprinkler located over feed line (Harner et al., 1999) (a) Side View (b) Top View

Agrartechnik Hohenheim 5 Introduction Objectives The objective is to develop a mathematical model in order to: configure the microsprinklers and fans cooling system specify its engineering parameters, e.g. pump discharge & pressure calculate capital investment and fixed, variable, and total costs

Agrartechnik Hohenheim 6 An electronic spark map was developed using MS-Excel Materials and Methods A mathematical model was developed for designing cooling systems The mathematical model was then integrated into the spark map Model validation was carried out using data of 4 cooling systems COV and σ were calculated C# was used to develop a computer software

Agrartechnik Hohenheim 7 Using the mathematical model, the spark map calculates the following: o discharge and pressure of cooling system pump o length and diameter of cooling system pipelines o number of microsprinklers o number of cooling fans o costs of the configured cooling system Materials and Methods

Agrartechnik Hohenheim 8 Results and Discussion Electronic Spark Map Figure 3: Spark Map Engineerin g Parameters System Components Cost s

Agrartechnik Hohenheim 9 Results and Discussion Mathematical Model

Agrartechnik Hohenheim 10 Results and Discussion Mathematical Model

Agrartechnik Hohenheim 11 Results and Discussion Mathematical Model

Agrartechnik Hohenheim 12 Results and Discussion Mathematical Model

Agrartechnik Hohenheim 13 Results and Discussion Mathematical Model

Agrartechnik Hohenheim 14 Results and Discussion Computer Software Figure 4: Input data window of cooling system model

Agrartechnik Hohenheim 15 Results and Discussion Computer Software Figure 5: Output data window of cooling system model Figure 4: Input data window of cooling system model

Agrartechnik Hohenheim 16 COV ranges between 2.25% and 4.13% The system’s accuracy is 97.8% Results and Discussion Validation and Evaluation Table 1: Data of 4 cooling systems

Agrartechnik Hohenheim 17 The spark map can be then instantly used to make calculations, and to get automatically the results of the input settings Most mathematical models can be developed as spark maps in order to simplify their use for practical implementation Spark map (semi-automatic system) → back diagram code of the computer software (automatic system) Conclusions

Agrartechnik Hohenheim 18 Summary The mathematical model is then integrated into the spark map A mathematical model and a spark map were developed A computer software was developed using C# language Data of 4 cooling systems were used to carry out the model validation and evaluation

Agrartechnik Hohenheim 19 Perspective Additional sub-models were developed: Concrete Base Forage Storage Roof Materials & Structures Water Consumption and Sources Electricity Consumption and Sources Farm Planning Milking Parlor Constructions Manure Tanks The main models were developed: 1. Design Model 2. Costs Calculation Model Cooling System Biogas Plant Constructions Expert System Configuration

Agrartechnik Hohenheim 20 Thank You !