**Question 2**The specific enthalpy of the cold water, h2, in kJ/kg is[Text Box]---**Question 3**The specific enthalpy of the warm mixed water, h3, in kJ/kg is[Text Box]---**Question 4**The rate of heat loss in kW is[Text Box] ### Mixing Process of Hot and Cold Water Streams**Scenario:**A hot-water stream at 90 °C enters an insulated mixing chamber with a mass flow rate of \( m_h = 0.75 \, \text{kg/s} \). It is mixed with a stream of cold water at 25 °C in a steady state, steady flow process. The objective is for the mixture to exit the chamber at 45 °C.**Figure Explanation:**- **Hot Water Inlet (1):** - Pressure: \( P_1 = 300 \, \text{kPa} \) - Temperature: \( T_1 = 90 \, \text{°C} \) - Mass Flow Rate: \( \dot{m}_h = 0.75 \, \text{kg/s} \)- **Cold Water Inlet (2):** - Pressure: \( P_2 = 300 \, \text{kPa} \) - Temperature: \( T_2 = 25 \, \text{°C} \) - Mass Flow Rate: \( \dot{m}_c = ? \)- **Mixed Warm Water Outlet (3):** - Pressure: \( P_3 = 300 \, \text{kPa} \) - Temperature: \( T_3 = 45 \, \text{°C} \) - Mass Flow Rate: \( \dot{m}_3 \)### Important Concepts:- **Insulated Mixing Chamber:** Assumes no heat loss to surroundings.- **Mass and Energy Balance:** Calculations should ensure the balance of mass and energy as no accumulation occurs due to steady state.- **Pressure Continuity:** All streams maintain a constant pressure of 300 kPa throughout the process.This setup assists in understanding practical applications of thermodynamics in fluid mixing processes, commonly used in various engineering systems.

Answered: Image /qna-images/answer/a407b2ad-843c-4eee-a83c-9f1468a27d07.jpg

A hot-water stream at 90 °C enters an insulated mixing chamber with a mass flow rate of mh=0.75 kg/s where it is mixed with a stream of cold water at 25°C in a steady state steady flow process. It is desired that the mixture leaves the chamber at 45°C as shown in the Figure Hot water P₁=300 kPa T₁=90°C m=0.75 kg/s Cold water P-300 kPa T₁=25% m=? 1 2 Mixing Chamber Mixed warm wate P-300 kPa T=45°C m3

A hot-water stream at 90 °C enters an insulated mixing chamber with a mass flow rate of mh=0.75 kg/s where it is mixed with a stream of cold water at 25°C in a steady state steady flow process. It is desired that the mixture leaves the chamber at 45°C as shown in the Figure Hot water P₁=300 kPa T₁=90°C m=0.75 kg/s Cold water P-300 kPa T₁=25% m=? 1 2 Mixing Chamber Mixed warm wate P-300 kPa T=45°C m3

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

### Mixing Process of Hot and Cold Water Streams

**Scenario:**
A hot-water stream at 90 °C enters an insulated mixing chamber with a mass flow rate of \( m_h = 0.75 \, \text{kg/s} \). It is mixed with a stream of cold water at 25 °C in a steady state, steady flow process. The objective is for the mixture to exit the chamber at 45 °C.

**Figure Explanation:**

- **Hot Water Inlet (1):**
- Pressure: \( P_1 = 300 \, \text{kPa} \)
- Temperature: \( T_1 = 90 \, \text{°C} \)
- Mass Flow Rate: \( \dot{m}_h = 0.75 \, \text{kg/s} \)

- **Cold Water Inlet (2):**
- Pressure: \( P_2 = 300 \, \text{kPa} \)
- Temperature: \( T_2 = 25 \, \text{°C} \)
- Mass Flow Rate: \( \dot{m}_c = ? \)

- **Mixed Warm Water Outlet (3):**
- Pressure: \( P_3 = 300 \, \text{kPa} \)
- Temperature: \( T_3 = 45 \, \text{°C} \)
- Mass Flow Rate: \( \dot{m}_3 \)

### Important Concepts:

- **Insulated Mixing Chamber:** Assumes no heat loss to surroundings.
- **Mass and Energy Balance:** Calculations should ensure the balance of mass and energy as no accumulation occurs due to steady state.
- **Pressure Continuity:** All streams maintain a constant pressure of 300 kPa throughout the process.

This setup assists in understanding practical applications of thermodynamics in fluid mixing processes, commonly used in various engineering systems.

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