How to design the energy saving cooling system for factory production line and office building

How to design the energy saving cooling system for factory production line and office building | Hstarschiller.com

Project Overview

This project is for one of the new factory buildings for one of the 500 fortune company of Dairy industry . The factory new workshop building area is about 17,000 square meters, with a total of 2 floors. H.Stars Group has helped this company to design the energy saving cooling system by adopting low-temperature chiller and low-ambient temperature air source heat pump unit

Project Requirement

low-temperature chiller

Project design
This project has air conditioning system, ice water system and hot water system, which has both cooling demand and heating load. The design of a system for the project can meet all the above requirements. Under the premise of ensuring safe and reliable operation, this scheme should balance the cold and heat as much as possible to make the system efficient and energy-saving. See the system flow chart for details.
The whole project designs a refrigeration station, equipped with a flooded type water-cooled low-temperature chiller (with heat recovery) + a low-ambient temperature air source heat pump unit (with cold recovery), and a square closed cooling tower. The system is designed with 2 thermal insulation water tanks, namely -5℃ ice water tank and 50℃ hot water tank.

Device Configuration

System flow chart

On-site real picture

Energy saving analysis
1. Winter energy-saving measures: When the ambient temperature of the room is lower than 0°C, the system preferentially uses a closed cooling tower to produce 2°C ice water to reduce the running time of the low-temperature chiller and reduce the load of the chiller by 15%.
2. The air-conditioning system is designed for high-temperature cooling in summer, and its water supply temperature is 12°C. The COP of the equipment is 35% higher than the existing use conditions, which reduces the initial investment and operating costs.
3. The low-temperature chiller adopts a large temperature difference design, the overall efficiency is increased by 7.5%, the pump power is reduced by 32% and the cost of supporting projects is 30%.
4. The low-ambient temperature air source heat pump unit is equipped with cold and heat energy recovery, one input produces two outputs, which optimizes the use of cold and heat and reduces initial investment and operating costs.

Advantage of solution
(1) Highly integrated: a set of systems integrates three functions:Coolin, heating and hot water.
(2) Green and environmental protection: No boiler room system is required for heating, and there is no emission pollution during use.
(3) Safe and reliable: The unit adopts dual-system loop design to ensure operational reliability.
(4) High efficiency and energy saving: the unit is equipped with cold and heat energy recovery, making full use of energy.
(5) Intelligent control: The equipment adopts PLC automatic control, no special person is required to supervise the machine room.

Solution Summary
The scheme design integrates a variety of systems with different working conditions and makes full use of the cold and heat energy of the system. The system design enables each unit to produce two benefits during operation. The energy discharged in the conventional scheme system design is reused, which greatly reduces the initial investment and operating costs.

For more details, welcome to contact us at sales@hstars.com.cn or www.hstarschillercom

Avoid Downtime, Cut Costs: Smart Maintenance for Smarter Chillers

Screw water-cooled chillers typically operate around 3,000 hours per year, depending on China's climate and geographical conditions. Regular and scientific maintenance is crucial to ensure long-term, reliable operation, extend the lifespan, and reduce operating costs. Maintenance and Upkeep Preventive maintenance during operation and inspection involves creating annual and monthly maintenance plans based on actual operating conditions. Shutdown Procedures In winter, clean and dry the unit. Open the drain valve to empty the shell-and-tube heat exchanger to avoid freezing. The shutdown sequence is: chiller off - cooling tower fan off - cooling water pump off - chilled water pump off. Special attention to anti-freezing: 1. Drain the evaporator and condenser if the unit is outdoors below 0°C during standby. 2. Interlock the water flow switch with the unit to prevent freezing when the chilled water flow switch malfunctions. 3. Ensure water in the evaporator is flowi...

阅读全文

What Are the Key Requirements for Flooded-Type Heat Exchangers in Air Suspension Chillers

Air suspension chillers are crucial in many industrial and commercial applications, and the flooded-type heat exchanger is one of the most important components of these systems. Understanding the requirements of the heat exchanger is essential to ensuring the air suspension units operate efficiently and remain stable. A flooded-type heat exchanger works by transferring heat between two fluids with different temperatures. In air suspension chillers, it helps regulate temperature, optimize energy use, and improve overall performance. For instance, it can transfer heat from high-temperature gases to low-temperature liquids, or vice versa. 1. Material Requirements 1.1 Corrosion Resistance In many industrial environments, fluids can be corrosive. For example, they may come into contact with acidic or alkaline substances. To withstand these conditions, the heat exchanger’s tubes and casing need to be made from corrosion-resistant materials, such as stainless steel. Stainless ste...

阅读全文

Hotels Go Green: Heat Recovery Chillers Cut Costs and Carbon Footprints

In the operation of hotels, energy costs are a significant factor that cannot be overlooked. The advent of heat recovery chillers offers an efficient and energy-saving solution for hotels. A heat recovery chiller, in simple terms, not only performs cooling tasks but also effectively recovers heat. For hotels, this is a highly practical feature. Traditional chillers only accomplish cooling, wasting the heat generated. However, heat recovery chillers are different; they can convert the otherwise wasted heat into usable hot water. In principle, during the cooling cycle of a chiller, the refrigerant releases heat. Heat recovery chillers use special devices to collect this heat, and through a series of heat exchange processes, they can produce hot water. This hot water can be used in various scenarios within the hotel. For example, it can supply water for guest rooms' washing and brushing, provide hot water for the hotel's restaurant kitchen, and even be used for heati...

阅读全文

H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

搜索此博客