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Waste Heat Recovery Unit (Direct-Heat Type)

Name: Waste Heat Recovery Unit (Direct-Heat Type)
Brand: Wan Beardsley Compressor (Shanghai) Co., Ltd.
Availability: InStock

Cold water enters and hot water exits, with an outlet temperature of 50–80°C. Based on heat‑balance calculations, the heat exchanger is sized to ensure that cold water is heated within 20 seconds, delivering hot water at 50–80°C directly.

Product Introduction

Waste Heat Recovery Unit (Direct-Heat Type)

Product Features

Direct‑heat heat exchange: cold water enters and hot water exits, with an outlet temperature of 50–80°C. Based on thermal balance calculations, the heat exchanger’s size and surface area are determined to ensure rapid heating of cold water within 20 seconds, delivering hot water at 50–80°C directly.

Constant‑temperature hot water: Utilizing a thermostatic control system and PLC touch‑screen technology, the unit ensures direct delivery of hot water with a stable outlet temperature maintained within ±2°C.

Maintaining Compressor Oil Temperature: Utilizing PLC‑based automatic control with a 7‑inch touch screen, the system ensures the air compressor operates within its optimal temperature range of 75–85°C. The heat generated by the compressor is matched to the heat exchanger of the waste‑heat recovery unit, enabling stable operating temperatures. After passing through the waste‑heat recovery unit, the compressor’s oil returns to its original cooler for further cooling, preventing overheating. When the compressor’s operating temperature drops below the set point of 65°C—such as during shutdown or unloading—the inlet water supply is automatically shut off, ensuring no heat exchange occurs between the hot oil and water and preventing a decline in oil temperature.

Pump‑free operation: The system can utilize the natural water pressure of the municipal supply. With its low heat‑exchanger resistance, even standard city water supplies typically provide pressures exceeding 2 kg/cm²—sufficient to meet the unit’s pressure requirements. Consequently, a circulation pump is unnecessary, enabling hot‑water production while reducing electricity costs. If the available water pressure is insufficient, a low‑power booster pump can be installed as needed.

Product model	Compatible air compressor (kW/HP)	Waste heat recovery capacity (kW)	Outlet water temperature	Water production rate m³/h (temperature rise of 40°C)	Interface pipe diameter (oil circuit/water circuit)	External dimensions mm (L×W×H)
WZS-30A/Z	22kW/30HP	17.6	55~80℃	0.38	DN25/DN25	700×400×800
WZS-50A/Z	37kW/5OHP	29.6	55~80℃	0.64	DN25/DN25	750×400×870
WZS-75A/Z	55kW/75HP	44	55~80℃	0.95	DN25/DN25	750×400×870
WZS-100A/Z	75kW/100HP	60	55~80℃	1.3	DN32/DN32	850×460×905
WZS-125A/Z	90kW/125HP	72	55~80℃	1.6	DN40/DN40	850×460×905
WZS-150A/Z	110kW/150HP	88	55~80℃	1.9	DN40/DN40	850×460×905
WZS-175A/Z	132kW/175HP	105.6	55~80℃	2.3	DN40/DN40	850×460×905
WZS-200A/Z	150kW/200HP	120	55~80℃	2.6	DN40/DN40	900×500×1000
WZS-220A/Z	160kW/220HP	128	55~80℃	2.8	DN40/DN40	900×500×1000
WZS-250A/Z	185kW/250HP	148	55~80℃	3.2	DN40/DN40	900×500×1000
WZS-300A/Z	225kW/300HP	180	55~80℃	3.8	DN50/DN50	1100×600×1100
WZS-350A/Z	250kW/350HP	200	55~80℃	4.3	DN50/DN50	1100×600×1100
WZS-400A/Z	300kW/400HP	240	55~80℃	5.1	DN50/DN50	1100×600×1100
WZS-450A/Z	315kW/450HP	252	55~80℃	5.4	DN50/DN50	1100×600×1100
WZS-500A/Z	355kW/500HP	284	55~80℃	6.1	DN50/DN50	1200×650×1200
WZS-550A/Z	400kW/550HP	320	55~80℃	6.8	DN65/DN50	1200×650×1200
WZS-600A/Z	450kW/600HP	360	55~80℃	7.7	DN65/DN50	1200×650×1200