Chiller control system

Maximum chiller efficiency is achieved by controlling refrigerant flow and getting the coldest possible water to the condensers. The chilled-water supply temperature is usually control led by the chiller. Most commonly, supply water temperature is used as the sensed variable to permit control of chiller capacity to meet system load demand. Supply- temperature control strategies may be used on either constant- or variable- flow systems.

Microprocessor-Based Control System s. One of the most significant changes in new chiller design is the control system.

Gone are the electro-mechanical system s of the past. The control valve is also control led with a PID control ler. Figure 2: Flownex model of the three stage chiller plant with control system. Both chiller types rely on three basic principles.

First - When a liquid is heated it vaporizes into a gas, and when a gas is cooled it condenses into a liquid. System components must work in harmony to maximize comfort, compliance and performance. Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state.

In a microprocessor-based system , the sensor input is converted to a digital form, where discrete instructions (algorithms) perform the process of comparison and control.

Most sub system s, from VAV boxes to boilers and chiller s, now have an onboard DDC system to optimize the performance of that unit. OptiPlant Trane OptiPlant is the customized control solution for comfort cooling installations with two air-cooled chillers of the same size in small buildings and commercial spaces. With the growing concern about energy consumption, DB Sales has made it a priority to partner with manufacturers who share our goals in providing the most environmentally responsible and resource-efficient products including air handlers and also high-efficiency chillers, boilers and air-side systems.

The PSG chiller controller was manufactured on an OEM bases for Drake Refrigeration located in Bensalem PA. This control routine calculates a reduced cooling capacity kW setpoint based on present chiller tonnage, capacity of the lag chiller to be stoppe and adjustable deadband to prevent short cycling. In the industrial chiller refrigeration system , the main role of the valve is to control the flow and direction of the refrigerant. In daily use, it also needs to use the valve frequently.

When the industrial chiller needs to stop or start, it all needs to use the valve. Whether it be one of our OEM exclusive controls, or a control from our ever advancing Hydromatic family, Micro-Air has once again been the leader and continues to bring emerging technologies to the field. Use of touch panels, supporting variable capacity systems, and CAN bus networking, are just a few. HVAC Controls and Systems. Our communicating controllers share information making sure your building automation systems work together maximizing both comfort and energy efficiency.

With controls ranging from thermostats and zoning systems to powerful, web-based software products, Carrier places the power to keep your system operating at peak performance at your fingertips. We’re experts in helping you balance the growing need for efficiency with the consistent demand for comfort. A liquid (glycol based) chiller with an air cooled condenser on the rooftop of a medium size commercial building. In air conditioning systems, chilled water is typically distributed to heat exchangers, or coils, in air handlers or other types of terminal devices which cool the air in their respective space(s).

Many people wonder what Building Automation Systems (BAS) can do.

Building Automation itself is an energy management system which saves management companies and building owners by efficiently controlling air conditioning and heating comfort and process systems. The basic components of a chiller consist of a pump to circulate the flui a reservoir to hold a volume of cold fluid in the chiller , a refrigeration system to cool the flui and a temperature control module. The H, the V, the AC in one piece of equipment. Uses air dampers, and chilled and heating water from the chiller and the boiler to heat and cool the air.

Also filters the air and draws in outside air. It is often located in the mechanical equipment room (Figure 4). Figure shows a typical single zone DDC system. The compressor and condenser are normally located on the outside part of the air conditioner while the evaporator is located on the inside.

Most central air conditioning systems in homes are split systems. Many today use for ductless mini-split systems, which can be installed by do-it-yourselfers,. Analog sensors are used to monitor continuously changing conditions. Improve machine performance and increase energy efficiency while reducing maintenance and improving reliability.

The primary job of any chilled water system is to remove heat from a product, space or system. To do this, chilled water systems transfer heat from water being pumped through a piping network to a refrigerant such as R-134a or ammonia. Four kinds of water chillers are available for commercial and industrial use. The Innotech IWP range of controllers is designed to regulate the staging of heating and cooling of air conditioning systems. Page 2: General Information days of delivery, claiming observed during maintenance and for the described damage.

We offer a wide selection of compres-sors and condensing units that are incorporated with these components to produce one of the most efficient chiller systems available. Chilled Water System Control 4. Finally, this type of control panel is from an older chiller. Modern chillers have microprocessor controls where precision control of the chiller adds efficiency and multiple levels of control. Our control systems are designed from the ground up to meet the most stringent building requirements and government regulations. Our professionals interact with the clients and in accordance with their requirements, plan and execute these services.

A LEADER IN CONTROL SYSTEM TECHNOLOGY. In contrast between and 1 flow is used to address of the cooling load in a conventional system. Water-based cooling systems are typically treated with chemicals to prevent mineral scale formation, control biological activity, and inhibit corrosion. Chemical water treatment in the chemicals or their toxic byproducts being released into the environment through leaks, water discharge (blowdown), air emissions, spills, spray, and drift. It includes coverage of commercial heating and cooling systems, indoor air quality, ventilation requirements,.

CPECS utilizes continual data feedback loops and advanced control algorithms to process chiller plant data in real time to analyze the load profiles of the building, climate data and equipment performance models to implement a precise load based matching approach that provides the maximum level of system performance while respecting chiller. These chemical emissions are environmentally harmful. In a cooling tower, chlorine or some other biocide is commonly used to control biological activity and reduce pathogens. Our customized panels combine industry-leading parts with your specific application requirements for an integrated package. By submitting this form, you are granting: Control System Labs, Inc.

For over years, Mokon has set the standard for high quality heating and cooling process temperature control systems. We provide accurate and reliable temperature control ranging from -20˚F to 700˚F (-29˚C to 371˚C). Increase Occupant Comfort and Safety. The second safety is a freezestat control.