language

BLOG

Specializing in the research, development, production, sales, equipment consulting, maintenance, and accessory services of heat exchange technology, equipment, and systems

Category >

Company Blog

Industry Blog

2018

Bypass plate heat exchanger

Author:

Summary:

1. Features and Uses The bypass plate heat exchanger is a newly developed product designed for urban centralized air conditioning heating systems. It has advantages such as high heat transfer efficiency, low pressure drop, compact structure, and easy installation. When operating under non-uniform flow conditions, it saves 30% of the heat exchange area compared to uniform cross-section plate heat exchangers. This product is also suitable for other non-uniform flow heat exchange scenarios. 2. Economic Efficiency of the Product In air conditioning heating systems, since the temperature difference between the supply and return water is more than twice that of the secondary water, the flow rate of the secondary water is more than twice that of the primary water during thermal balance. In this case, when selecting a heat exchanger, it is necessary to increase the number of flow passages.

1. Features and Uses

The bypass plate heat exchanger is a new product developed for urban centralized air conditioning heating systems. It has advantages such as high heat transfer efficiency, low pressure drop, compact structure, and easy installation. When operating under unequal flow conditions, it saves 30% of the heat exchange area compared to equal cross-section plate heat exchangers.

This product is also suitable for other occasions of unequal flow heat exchange.

2. Economic Efficiency of the Product

In air conditioning heating systems, since the temperature difference between the supply and return water of the primary water is more than twice that of the secondary water, the flow rate of the secondary water is more than twice that of the primary water during thermal balance. In this case, when selecting a heat exchanger, it is necessary to increase the number of flow passages to meet the pressure drop requirements of the secondary water, resulting in a multiplied increase in heat exchange area. Therefore, simply adopting this scheme in air conditioning heating systems is very uneconomical.

The bypass plate heat exchanger utilizes the diversion effect of the bypass pipe and adjusts the opening of the temperature regulator, allowing 20% to 50% of the secondary water to enter the heat exchanger. This way, the flow rates of the secondary and primary water are similar, without being limited by flow resistance, effectively utilizing the high heat transfer efficiency of the plate heat exchanger, significantly reducing the heat exchange area, and consequently lowering system costs.

3. Product Structure and Working Principle

The bypass plate heat exchanger mainly consists of the BR series equal cross-section plate heat exchanger and the bypass pipe and temperature regulator in parallel on the secondary water side.

The heat source of this product is steam or hot water (primary water). All primary water or steam flows through the heat exchanger for heat exchange. A portion of the secondary water flows through the heat exchanger for heat exchange, while another portion mixes with the secondary water exiting the heat exchanger through the bypass pipe at the secondary water outlet, ensuring the mixed temperature meets the required supply temperature for the usage water.

4. Operation and Adjustment

(1) Before putting this product into operation, the temperature regulator in the bypass pipe should be opened to more than half of its opening, then fill the secondary water first, followed by filling the primary water or steam, and venting the air from the equipment.

(2) Adjust the flow rates of the primary and secondary water to the design values, then make the following adjustments to the bypass valve of the heat exchanger:

1. When the pressure drop of the secondary water exceeds the allowable value or the supply temperature is too high, the opening of the bypass butterfly valve should be increased to enhance the bypass flow, reducing the pressure drop of the secondary water to below the specified value, which will also lower the supply temperature.

2. When the pressure drop of the secondary water is far below the allowable value or the supply temperature is below the working condition requirements (the flow through the heat exchanger is too small), the opening of the bypass valve should be reduced to decrease the bypass diversion, increasing the flow through the heat exchanger to meet the supply temperature requirements.

(3) When the supply temperature of the primary water is below the design value, the flow rate of the primary water should be increased; conversely, it should be decreased.

(4) When shutting down, first close the primary water (or steam) valve, then close the secondary water valve.

Maintenance of plate heat exchangers

Instructions for Using Tube Coolers

:Next

Maintenance of plate heat exchangers

Instructions for Using Tube Coolers

Heat Exchanger Standards

2025-09-17

Heat exchange equipment solutions

Chongqing Southwest Saiwei Heat Exchange Equipment Co., Ltd. is committed to providing customers with excellent heat exchange equipment solutions. With the rapid development of the industrial field, the demand and application of heat exchange equipment are becoming more and more extensive. The company deeply knows that each customer's needs are unique, so customized solutions have become our core competitiveness.

2025-08-13

Which heat exchanger is good?

2025-07-22

Heat exchanger material and corrosion resistance

2025-07-08

Which heat exchanger is good?

2025-06-27

Chongqing Southwest Saiwei Heat Exchange Equipment Co., Ltd. boosts the take-off of China's heat exchange technology.

2025-05-30

Contact Information

Telephone:

Customer service hotline:

+86-23-63521288

+86-23-63521388

+8613500387128

Address:

Baishiyi, Jiulongpo District, Chongqing

E-mail:

cqb@saiwell.com

Quick Connect

Home
About Us
Products
Production Equipment
Case s
Service & Support
Blog
Contact Us

Chongqing Southwest Saiwell Heat Exchange Equipment Co., Ltd.

Specializing in the research, development, production and sales, equipment consulting, maintenance, and accessory services of heat exchange technology, equipment, and systems, and undertaking the design and installation of thermal system engineering, energy conservation and emission reduction, and energy conservation and emission reduction system engineering.

Business License

COOKIES

Our website uses cookies and similar technologies to personalize the advertising shown to you and to help you get the best experience on our website. For more information, see our Privacy & Cookie Policy

COOKIES

required

These cookies are necessary for basic functions such as payment. Standard cookies cannot be turned off and do not store any of your information.

analyze

These cookies collect information, such as how many people are using our site or which pages are popular, to help us improve the customer experience. Turning these cookies off will mean we can't collect information to improve your experience.

Feature

These cookies enable the website to provide enhanced functionality and personalization. They may be set by us or by third-party providers whose services we have added to our pages. If you do not allow these cookies, some or all of these services may not function properly.

advertise

These cookies help us understand what you are interested in so that we can show you relevant advertising on other websites. Turning these cookies off will mean we are unable to show you any personalized advertising.