Before Buying Any Energy System: 7 Questions That Should Come First

Before Buying Any Energy System: 7 Questions That Should Come First When energy bills rise or an existing system becomes expensive to operate, the first reaction is often: What equipment should we buy? A heat pump? A new chiller? Solar PV? A larger boiler? VRF? From an engineering perspective, this question comes too early. The first question should be: What problem are we actually trying to solve? Many project failures begin before installation, when technology is selected before the facility’s real loads, operating conditions, and constraints are understood. Good engineering starts with data—not products. 1. What Is the Facility’s Actual Load? Installed equipment capacity does not necessarily represent actual demand. A facility may have a 1,000 kW boiler but require that full output for only a few hours each year. A chiller may have been selected years ago when the building operated differently. Engineering must therefore distinguish between: Installed Capacity and: Actual Load Sizing a new system from nameplate capacity alone can result in oversizing, higher investment, short cycling, and lower operating efficiency. 2. How Does the Load Change Throughout the Day and Year? Maximum load is not enough. The better question is: How many hours does the facility operate at each load level? This is where the load profile and load-duration curve become valuable. A facility may spend most of its operating hours at only 20–30% of peak demand. In that case, a system designed around the base load, with existing equipment retained for peaks, may produce a better investment outcome. Real Example At Hive Fitness in Amman, the heat pump was not sized to match the existing boiler capacity. Load-duration analysis showed that the base load represented most annual operating hours. The heat pump was therefore sized at less than 20% of the boiler’s rated capacity, while the boiler remained available for peak demand and backup. 3. What Temperatures Are Actually Required? This is particularly important for heat pumps. “Hot water” is not an engineering specification. Do you need: 35°C? 45°C? 55°C? 60°C? As required water temperature rises, heat pump operating conditions become more demanding and efficiency generally decreases. A low-temperature underfloor heating system may therefore be highly suitable for heat pumps, while a high-temperature industrial application requires a different evaluation. 4. What Does Energy Actually Cost the Facility? Energy decisions should not be based only on kWh. Facilities may use: - Electricity - Diesel - Natural gas - LPG - Steam - Other thermal-energy sources The analysis should consider tariffs, demand charges, peak periods, taxes, system efficiency, and maintenance. The useful comparison is: Cost per useful unit of energy delivered not simply the purchase price of fuel. 5. Is the Problem Generation, Distribution, or Control? Sometimes the equipment itself is not the main problem. Poor performance may be caused by: - Pumping - Water flow - Hydraulic imbalance - Insulation - Thermal storage - Controls - Setpoints - Short cycling - Air distribution - Filters - BMS logic In HVAC systems, the complete chain should be evaluated: Generation → Storage → Pumping → Distribution → Control → Terminal Units Replacing the generator alone will not solve a distribution or control problem. 6. Do We Need to Replace the Existing System Completely? Not always. The strongest solution may be a hybrid strategy. For example: - Heat pump for base load - Boiler for peak demand - Solar thermal for preheating - Solar PV for electrical demand - Thermal storage - Improved controls InterContinental Aqaba Example At InterContinental Aqaba, heat pumps were integrated to serve a major portion of the thermal load while the existing diesel system remained available for peaks and emergency backup. The objective was not to remove everything. It was to reduce operating cost while maintaining reliability. The measured operating-cost reduction reached approximately 70% during the verified period. 7. How Will We Know the Project Worked? This question should be answered before installation. Define: - The baseline - What will be measured - Required meters - Measurement period - Success KPI - Weather adjustments - COP measurement - Thermal-energy measurement - Cost or consumption comparison Without a measurement strategy, proving success after implementation becomes much harder. Selling Equipment vs Engineering a Decision Equipment selling starts with the product: “This is a great heat pump. Where can we install it?” Engineering starts with the problem: What is the load? How does it operate? What does it cost? What alternatives exist? What constraints apply? Then the technology is selected. The answer may be a heat pump. It may be solar PV. It may be HVAC controls. It may be a hybrid system. Or the right answer may be: Do not replace the system yet. That can also be a good engineering decision. Why Solar PV Should Not Start with Roof Area A common question is: How many panels can we fit? The better question is: How much generation does the facility actually need? PV design should begin with: - Electrical consumption - Load profile - Operating hours - Future loads - Electrification opportunities - Grid arrangements - Regulatory constraints Then available area is evaluated. In many projects, the better sequence is: Reduce consumption → Electrify thermal loads → Generate renewable energy rather than the reverse. What Data Should You Prepare? Before an engineering assessment, useful information includes: - 12 months of electricity bills - Fuel or gas bills - Operating hours - Existing equipment - Installed capacities - Required temperatures - Facility area - Drawings - Production data - Existing meters - Current operational problems Every additional data point reduces uncertainty. A Simple Engineering Decision Process 1. Measure Understand consumption and load. 2. Diagnose Identify the actual problem or opportunity. 3. Compare Evaluate technical and financial alternatives. 4. Implement Install the right solution at the right size. 5. Verify Measure actual post-implementation performance. This process matters more than the brand name printed on the equipment. Warning Signs Before Buying Be cautious when you hear: “This system always saves 50%.” “Just match the old boiler capacity.” “A bigger heat pump is better.” “Fill every available roof area with solar panels.” “You do not need measurement; the bill will show the result.” Engineering problems vary between facilities. Good decisions require facility-specific answers. Conclusion Engineering decisions do not begin with equipment. They begin with understanding the facility. Before asking: What system should we buy? ask: What is the real load? How does it change? What does the current system cost? What is the actual problem? What alternatives exist? What is the feasibility? How will we verify the result? Once these questions are answered, technology selection becomes much clearer. The knowledge that comes before the decision is not an extra step. It determines whether the decision itself is right.