Warm Water Pool System Simulation: Design and Manufacture

Human development and national competitivenes is one of the flagship programs from The Indonesian Government. Bali as one of the best tourist destination in the world is required to have an international standard tourism infrastructure. A swimming pool in a tourism accomodation is a standard facility in a tourist infrastructure. There are several types of swimming pools i.e. public swimming pools and private pools. During its development and demand, private pools develop into swimming pools with additional facilities such as warm water, which is often called a jacuzzi. Another additional facility is added pressure to the water in completing massage, fragrance and foam. The swimming pool is one of facilitity designed to hold water to allow swimming or other recreational activities. Pools can be built in the ground or on the ground as a free construction or as a part of structure and also with a common feature or a free style design. In-ground pools are the most common pools made and constructed from materials such as concrete, natural stone, metal, plastic, or fiberglass. To support comfort and satisfaction when using the swimming pool, the adequate water level in the swimming pool will be maintained by system with several supporting devices such as pumps, dirt filters and maintained at a certain level. Other things that support water quality include temperature, water turbidity, color, odor, pH, chlorine content etc.


INTRODUCTION
Bali as one of the best tourist destination in the world which visited by many local and foreign tourists. In order to welcoming tourists, the facilities provided must be standard such and accommodation e.g. villas, hotels, spa, etc. where in these facilities will provide a standard facilities as well. One of these facilities is a swimming pool. The pool may consist of a large swimming pool for all hotel guests and small swimming pool for guests in more private villa. Today, there is also a swimming pool that uses warm water, so hotel guests can choose either regular pool or warm water. A swimming pool, wading pool, paddle pool, pond, or simply swimming pool is a structure designed to hold water to allow swimming or other recreational activities. Swimming pool can be built in-ground or on ground as a free construction or as a part of structure and also with a common feature or a free style design [1]. In-ground pools are most commonly constructed from materials such as concrete, natural stone, metal, plastic, or fiberglass and can be a special size and shape or built as a standard sizes while the largest being an Olympic-sized swimming pool.
To support the comfort and satisfaction of guests at the hotel, the hotel will design a safe and appropriate swimming pool for hotel guests according to a comfort location, environment and maintain the quality and quantity of the pool water. The water quality referred to water turbidity, color, odor, Ph, chlorine content and so on [2]. While the water quantity is the amount of water in the swimming pool at the level it should be, so there is no pool leakage or in the pool water circulation system which causes the water level to drop or completely run out. To get the desired results, it needs knowledge and materials to maintain quality and quantity of pool water. These knowledge here is in the form of how the requirements for pool water standards, like how the actual pool water circulation and what kind of equipment needed to support the pool water circulation system and of course, different from the requirements for drinking water standards. And then, what materials are needed to maintain the quality of water and not to harmed the health of people who swim e.g. cause irritation to the skin or eyes. These knowledge must owned by a person who in charge of handling water treatment and water circulation systems and from that problem, the writer raised the title "Design and Build Simulation of Warm Water Swimming Pool".

METHODS
Research methods is explaining the operational definition of variables along with data measurement tools or how to collect data and data analysis methods. If the data measurement tool uses a questionnaire, it is necessary to include the results of the validity and reliability of the research instrument.
This research will be conduct with a simulation design of a warm water swimming pool system. The author carries out a simulation design of a warm water swimming pool system. This design discusses the components will be used for the warm water swimming pool circulation system and their function -each component of the warm water swimming pool circulation, manufacture and how to maintain the swimming pool.
The circulation system that will be used is skimmer system which is a simple swimming pool system for large and small swimming pool and suitable as a tool / simulation. This system is assisted by a skimmer, main drain, jet holes as an inlet, a heater as a water heater and a sand filter that helps to maintain water quality. Figure  1. shows how the system will be made. The way of this system works is that the water will be pumped by a circulation pump where the suction part is on the skimmer where the water impurities float on the surface of the water and will enter this channel. The heavy dirt under the pool will be sucked up by the main drain. And then the water will be entering the circulation pump and will be pumped into the sand filter to be cleaned by circulating it in the sand filter box. In this device, the water will circulate together with sand and the dirt will be tight in the sand. The water will flow to the water heater, heated and then go to the jet hole as inlet water, back into the pool and thus the water will continue to circulate. The water heater will be heated the water until 32-33 o C. For more clearly to see how it works can be seen at figure 2.

Results
The result of this design is a swimming pool simulation tool which later can be used as practical material for Mechanical Engineering students at Bali State Polytechnic as a provision before they do internships at hotels or any other accommodation who had a swimming pool. From the design carried out, after working less than 3 months, the results are:

Discussion
After the design has been completed, it is continued to test the simulation pool system. At this stage the tool functions properly and is followed by data retrieval. Water content testing is carried out using a water tester as it is commonly used in pool water tests. From the initial test, it appears that the Ph level shows a value of 7.8 -8.2 and the HCL level shows a value of 1.0 -1.5, as shown below. According to the Regulation of the Minister of Health of the Republic of Indonesia [1] which applies where the addition of chlorine in 1m³ of pond is added as much as 2.5 grams. It means when pool volume is 1.28m³ then it is added as much as 3.2gram and for 100m³ is added 1 litre of HCL. From the data that has been collected for 10 days and taken at the same time (10.28 AM, 11.38 AM and 02.06 PM) tables and graphs can be made as below.
From the graph above, it can be said that the average Ph is 7.72 where the value is slightly above the normal limit. For chlorine levels it has not met the requirements too, where the average chlorine content for 7 days is 0.87, 0.3 point less than the ideal value that must be met.