Divided Water Receiving Tanks with Preheating for Hot Water Savings
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Solution Overview
Problem
Existing hot water supply systems face challenges in achieving energy savings and low facility costs, as the capacity of a single water receiving tank must be set to accommodate both hot and cold water demands, making it difficult to efficiently respond to energy-saving and cost-reduction requirements.
Innovation Solution
A hot water supply system is divided into a temperature non-raising water receiving tank and a temperature raising water receiving tank, with a preheating device that preheats water in the latter, allowing preheated water to be supplied to a hot water storage tank, thereby optimizing tank capacities and reducing facility costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single water receiving tank is used to supply both hot and cold water, then the system can meet overall water demand, but the tank capacity must be large to accommodate one-day use amount, increasing facility cost
Solution Approach 1:
The water receiving tank is divided into two separate tanks: a cold water receiving tank for general water supply and a hot water receiving tank for preheating water. This segmentation allows each tank to be sized according to its specific function rather than requiring one large tank to handle all water demands, reducing overall facility cost while maintaining supply reliability.
2Device complexity
If a single water receiving tank is used, then the system structure is simple, but energy consumption increases because all water must be heated from cold
Solution Approach 1:
The hot water receiving tank preheats water before it enters the hot water storage tank, performing a preliminary heating action. This reduces the energy burden on the hot water supply device, which only needs to raise the temperature further to the final required level, thereby reducing overall energy consumption while maintaining relatively simple system structure.
3Ease of manufacture
If the water receiving tank capacity is reduced for cost savings, then facility cost decreases, but the system cannot meet the one-day use amount requirement
Solution Approach 1:
By segmenting the water receiving tank into cold and hot water receiving tanks, the system can optimize the capacity of each tank for its specific purpose. The cold water receiving tank handles general supply requirements, while the hot water receiving tank is sized appropriately for preheating needs, allowing the system to meet total water quantity requirements at lower facility cost.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for energy savings and reduced facility costs by enabling the temperature non-raising tank to be compacted, while preheated water is efficiently supplied to the hot water storage tank, minimizing energy consumption and CO2 emissions.
Implementation Method 1
a preheating device preheating the water stored in the temperature raising water receiving tank
Data Source
AI summary
The present invention achieves energy saving and a decrease in facility cost for a hot water supply device by dividing a water receiving tank. A hot water supply system comprising: a water receiving tank receiving water supplied from a water supply source; a hot water storage tank connected to the water receiving tank via a connection pipe and storing hot water and supplying hot water to a hot water supply load; and a hot water supply device supplying the water stored in the hot water storage tank. The water receiving tank including: a temperature non-raising water receiving tank storing water supplied from the water supply source, the temperature non-raising water receiving tank, a general water supply pipe performing general water supply being connected; a temperature raising water receiving tank storing the water supplied from the water supply source and supplying the stored water to the hot water storage tank; and a preheating device preheating the water stored in the temperature raising water receiving tank.